Author: "Macromolecular Science and Engineering" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Macromolecular Science and Engineering"' showing total 1,594 results

Start Over Author "Macromolecular Science and Engineering"

1,594 results on '"Macromolecular Science and Engineering"'

1. Organic Dye Design Tools for Efficient Photocurrent Generation in Dye???Sensitized Solar Cells: Exciton Binding Energy and Electron Acceptors

Author: Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA., Department of Material Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Kim, Bong???gi, Zhen, Chang???gua, Jeong, Eun Jeong, Kieffer, John, Kim, Jinsang, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA., Department of Material Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Kim, Bong???gi, Zhen, Chang???gua, Jeong, Eun Jeong, Kieffer, John, and Kim, Jinsang
Abstract: The relationship between the exciton binding energies of several pure organic dyes and their chemical structures is explored using density functional theory calculations in order to optimize the molecular design in terms of the light???to???electric energy???conversion efficiency in dye???sensitized solar cell devices. Comparing calculations with measurements reveals that the exciton binding energy and quantum yield are inversely correlated, implying that dyes with lower exciton binding energy produce electric current from the absorbed photons more efficiently. When a strong electron???accepting moiety is inserted in the middle of the dye framework, the light???to???electric energy???conversion behavior significantly deteriorates. As verified by electronic???structure calculations, this is likely due to electron localization near the electron???deficient group. The combined computational and experimental design approach provides insight into the functioning of organic photosensitizing dyes for solar???cell applications. This is exemplified by the development of a novel, all???organic dye (EB???01) exhibiting a power conversion efficiency of over 9%. A combined computational and experimental design approach provides insight into the functioning of organic photosensitizer dyes for solar cell applications. Comparing calculations with measurements reveals that the exciton binding energy and quantum yield are inversely correlated. When a strong electron???accepting moiety is inserted in the middle of the dye framework, the light???to???electric energy conversion behavior significantly deteriorates.
Published: 2012

2. Macromol. Rapid Commun. 8/2012

Author: Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von??? Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen, Germany., Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von??? Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen, Germany, Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Deng, Xiaopei, Eyster, Thomas W., Elkasabi, Yaseen, Lahann, Joerg, Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von??? Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen, Germany., Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von??? Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen, Germany, Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Deng, Xiaopei, Eyster, Thomas W., Elkasabi, Yaseen, and Lahann, Joerg
Published: 2012

3. Engineering, Characterization and Directional Self-Assembly of Anisotropically Modified Nanocolloids

Author: Macromolecular Science and Engineering, University of Michigan, Ann Arbor, 48109, USA, Department of Chemical Engineering, University of Michigan, Ann Arbor, 48109, USA, Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, 48109, USA ; Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, 48109, USA., Centre for Nanoscale Science and Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide, 5001, Australia, Bhaskar, Srijanani, Gibson, Christopher T., Yoshida, Mutsumi, Nandivada, Himabindu, Deng, Xiaopei, Voelcker, Nicolas H., Lahann, Joerg, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, 48109, USA, Department of Chemical Engineering, University of Michigan, Ann Arbor, 48109, USA, Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, 48109, USA ; Departments of Chemical Engineering, Materials Science and Engineering, Macromolecular Science and Engineering and Biomedical Engineering, University of Michigan, Ann Arbor, 48109, USA., Centre for Nanoscale Science and Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide, 5001, Australia, Bhaskar, Srijanani, Gibson, Christopher T., Yoshida, Mutsumi, Nandivada, Himabindu, Deng, Xiaopei, Voelcker, Nicolas H., and Lahann, Joerg
Abstract: Along with traditional attributes such as the size, shape, and chemical structure of polymeric micro-objects, control over material distribution, or selective compartmentalization, appears to be increasingly important for maximizing the functionality and efficacy of biomaterials. The fabrication of tri- and tetracompartmental colloids made from biodegradable poly(lactide-co-glycolide) polymers via electrohydrodynamic co-jetting is demonstrated. The presence of three compartments is confirmed via flow cytometry. Additional chemical functionality is introduced via the incorporation of acetylene-functionalized polymers into individual compartments of the particles. Direct visualization of the spatioselective distribution of acetylene groups is demonstrated by confocal Raman microscopy as well as by reaction of the acetylene groups with azide-biotin via ???click chemistry???. Biotin???streptavidin binding is then utilized for the controlled assembly and orientation of bicompartmental particles onto functionalized, micropatterned substrates prepared via chemical vapor deposition polymerization.
Published: 2011

4. Macromol. Rapid Commun. 5/2011

Author: Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA, Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA ; Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA Fax: (+1) 734 764 7453., Lee, Kyung Jin, Hwang, Sangyeul, Yoon, Jaewon, Bhaskar, Srijanani, Park, Tae-Hong, Lahann, Joerg, Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA, Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA ; Department of Chemical Engineering, Macromolecular Science and Engineering, and Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA Fax: (+1) 734 764 7453., Lee, Kyung Jin, Hwang, Sangyeul, Yoon, Jaewon, Bhaskar, Srijanani, Park, Tae-Hong, and Lahann, Joerg
Abstract: No Abstract.
Published: 2011

5. Primary rat hepatocyte culture on 3D nanofibrous polymer scaffolds for toxicology and pharmaceutical research

Author: University of Michigan, Macromolecular Science and Engineering Center, Ann Arbor, Michigan, Department of Biologic and Materials Sciences, Department of Biomedical Engineering, University of Michigan, Macromolecular Science and Engineering Center, 1011 North University Ave, Room 2211, Ann Arbor, Michigan 48109-1078; telephone: +1-734-764-2209; fax: +1-734-647-2110 ; Department of Biologic and Materials Sciences, Department of Biomedical Engineering, University of Michigan, Macromolecular Science and Engineering Center, 1011 North University Ave, Room 2211, Ann Arbor, Michigan 48109-1078; telephone: +1-734-764-2209; fax: +1-734-647-2110., Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311, Department of Internal Medicine and Department of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311 ; Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311., Bierwolf, Jeanette, Lutgehetmann, Marc, Feng, Kai, Erbes, Johannes, Deichmann, Steffen, Toronyi, Eva, Stieglitz, Christina, Nashan, Bjoern, Ma, Peter X., Pollok, Joerg M., University of Michigan, Macromolecular Science and Engineering Center, Ann Arbor, Michigan, Department of Biologic and Materials Sciences, Department of Biomedical Engineering, University of Michigan, Macromolecular Science and Engineering Center, 1011 North University Ave, Room 2211, Ann Arbor, Michigan 48109-1078; telephone: +1-734-764-2209; fax: +1-734-647-2110 ; Department of Biologic and Materials Sciences, Department of Biomedical Engineering, University of Michigan, Macromolecular Science and Engineering Center, 1011 North University Ave, Room 2211, Ann Arbor, Michigan 48109-1078; telephone: +1-734-764-2209; fax: +1-734-647-2110., Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311, Department of Internal Medicine and Department of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311 ; Department of Hepatobiliary and Transplant Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany; telephone: +49-40-7410-58572; fax: +49-40-7410-45311., Bierwolf, Jeanette, Lutgehetmann, Marc, Feng, Kai, Erbes, Johannes, Deichmann, Steffen, Toronyi, Eva, Stieglitz, Christina, Nashan, Bjoern, Ma, Peter X., and Pollok, Joerg M.
Abstract: Primary rat hepatocytes are a widely used experimental model to estimate drug metabolism and toxicity. In currently used two-dimensional (2D) cell culture systems, typical problems like morphological changes and the loss of liver cell-specific functions occur. We hypothesize that the use of polymer scaffolds could overcome these problems and support the establishment of three-dimensional (3D) culture systems in pharmaceutical research. Isolated primary rat hepatocytes were cultured on collagen-coated nanofibrous scaffolds for 7 days. Cell loading efficiency was quantified via DNA content measurement. Cell viability and presence of liver-cell-specific functions (albumin secretion, glycogen storage capacity) were evaluated. The activity of liver-specific factors was analyzed by immunofluorescent staining. RNA was isolated to establish quantitative real-time PCR. Our results indicate that primary rat hepatocytes cultured on nanofibrous scaffolds revealed high viability and well-preserved glycogen storage. Albumin secretion was existent during the entire culture period. Hepatocytes remain HNF-4 positive, indicating highly preserved cell differentiation. Aggregated hepatocytes re-established positive signaling for Connexin 32, a marker for differentiated hepatocyte interaction. ZO-1-positive hepatocytes were detected indicating formation of tight junctions. Expression of cytochrome isoenzymes was inducible. Altogether the data suggest that nanofibrous scaffolds provide a good in vitro microenvironment for neo tissue regeneration of primary rat hepatocytes. Biotechnol. Bioeng. 2011; 108:141???150. ?? 2010 Wiley Periodicals, Inc.
Published: 2011

6. Isolation and Characterization of Dendrimers with Precise Numbers of Functional Groups

Author: Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA) ; Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-763-2283, Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-763-2283 ; Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA) ; Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Mullen, Douglas G., Borgmeier, Emilee L., Desai, Ankur M., Van Dongen, Mallory A., Barash, Mark, Cheng, Xue-min, Baker, James R., Banaszak Holl, Mark M., Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA) ; Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-763-2283, Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-763-2283 ; Macromolecular Science and Engineering, University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA) ; Michigan Nanotechnology, Institute for Medicine and Biological Sciences, University of Michigan, 9220 MSRB III, 1150 West Medical Center Dr. Ann Arbor, MI 48109 (USA), Mullen, Douglas G., Borgmeier, Emilee L., Desai, Ankur M., Van Dongen, Mallory A., Barash, Mark, Cheng, Xue-min, Baker, James R., and Banaszak Holl, Mark M.
Abstract: No Abstract
Published: 2010

7. Preface

Author: Macromolecular Science and Engineering, University of Michigan, Ann Arbor, USA ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, USA, Nanostructured and Biological Materials Branch, Air Force Research Laboratory, Dayton, USA, Department of Applied Chemistry, Waseda University, Tokyo, Japan, Electronic Materials Research Division, Osaka Municipal Technical Research Institute, Osaka, Japan, Daicel Chemical Industries Ltd Himeji, Japan, Laine, Richard M., Vaia, Richard A., Kuroda, Kazuyuki, Matsukawa, Kimihiro, Matsuda, Hirokazu, Sugihara, Yoshiyuki, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, USA ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, USA, Nanostructured and Biological Materials Branch, Air Force Research Laboratory, Dayton, USA, Department of Applied Chemistry, Waseda University, Tokyo, Japan, Electronic Materials Research Division, Osaka Municipal Technical Research Institute, Osaka, Japan, Daicel Chemical Industries Ltd Himeji, Japan, Laine, Richard M., Vaia, Richard A., Kuroda, Kazuyuki, Matsukawa, Kimihiro, Matsuda, Hirokazu, and Sugihara, Yoshiyuki
Abstract: No Abstract.
Published: 2010

8. Biocompatible Polymers: Structurally Controlled Bio-hybrid Materials Based on Unidirectional Association of Anisotropic Microparticles with Human Endothelial Cells (Adv. Mater. 48/2009)

Author: Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809, Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809 ; Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Materials Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809., Yoshida, Mutsumi, Roh, Kyung-Ho, Mandal, Suparna, Bhaskar, Srijanani, Lim, Dongwoo, Nandivada, Himabindu, Deng, Xiaopei, Lahann, Joerg, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809, Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809 ; Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Materials Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809., Yoshida, Mutsumi, Roh, Kyung-Ho, Mandal, Suparna, Bhaskar, Srijanani, Lim, Dongwoo, Nandivada, Himabindu, Deng, Xiaopei, and Lahann, Joerg
Abstract: No Abstract.
Published: 2010

9. Structurally Controlled Bio-hybrid Materials Based on Unidirectional Association of Anisotropic Microparticles with Human Endothelial Cells

Author: Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809, Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809 ; Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Materials Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809., Yoshida, Mutsumi, Roh, Kyung-Ho, Mandal, Suparna, Bhaskar, Srijanani, Lim, Dongwoo, Nandivada, Himabindu, Deng, Xiaopei, Lahann, Joerg, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809, Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809, Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809 ; Macromolecular Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Materials Science and Engineering The University of Michigan Ann Arbor, MI 4809 ; Department of Chemical Engineering The University of Michigan 3414 GGBL, 2300 Hayward Ann Arbor, MI 4809., Yoshida, Mutsumi, Roh, Kyung-Ho, Mandal, Suparna, Bhaskar, Srijanani, Lim, Dongwoo, Nandivada, Himabindu, Deng, Xiaopei, and Lahann, Joerg
Abstract: No Abstract.
Published: 2010

10. Conjugated Polymers Combined with a Molecular Beacon for Label-Free and Self-Signal-Amplifying DNA Microarrays

Author: Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA), Department of Chemical Engineering University of Michigan Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA), Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Chemical Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Macromolecular Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Biomedical Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA)., Lee, Kangwon, Rouillard, Jean-Marie, Kim, Bong-Gi, Gulari, Erdogan, Kim, Jinsang, Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA), Department of Chemical Engineering University of Michigan Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA), Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Chemical Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Macromolecular Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Biomedical Engineering University of Michigan Ann Arbor, MI 48109 (USA) ; Department of Materials Science and Engineering University of Michigan Ann Arbor, MI 48109 (USA)., Lee, Kangwon, Rouillard, Jean-Marie, Kim, Bong-Gi, Gulari, Erdogan, and Kim, Jinsang
Abstract: A conjugated polymer (CP) and molecular-beacon-based solid-state DNA sensing system is developed to achieve sensitive, label-free detection. A novel conjugated poly(oxadiazole) derivative exhibiting amine and thiol functional groups ( POX-SH ) is developed for unique chemical and photochemical stability and convenient solid-state on-chip DNA synthesis. POX-SH is soluble in most nonpolar organic solvents and exhibits intense blue fluorescence. POX-SH is covalently immobilized onto a maleimido-functionalized glass slide by means of its thiol group. Molecular beacons having a fluorescent dye or quencher molecule as the fluorescence resonance energy transfer (FRET) acceptor are synthesized on the immobilized POX-SH layer through direct on-chip oligonucleotide synthesis using the amine side chain of POX-SH . Selective hybridization of the molecular beacon probes with the target DNA sequence opens up the molecular beacon probes and affects the FRET between POX-SH and the dye or quencher, producing a sensitive and label-free fluorescence sensory signal. Various molecular design parameters, such as the size of the stem and loop of the molecular beacon, the choice of dye, and the number of quencher molecules are systematically controlled, and their effects on the sensitivity and selectivity are investigated.
Published: 2009

11. Multicompartmental Microcylinders

Author: Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-764-7453, Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-764-7453 ; Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Bhaskar, Srijanani, Hitt, Jonathon, Chang, Sei-Won, Lahann, Joerg, Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-764-7453, Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Fax: (+1)???734-764-7453 ; Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Bhaskar, Srijanani, Hitt, Jonathon, Chang, Sei-Won, and Lahann, Joerg
Abstract: Colorful columns : A simple yet scalable method that yields multicompartmental microcylinders with controllable internal architectures, aspect ratios, and controlled surface modification uses electrohydrodynamic co-spinning followed by microsectioning. Compartments are discriminated by different colored dyes (see CLSM images; scale bars=10.0???14??m).
Published: 2009

12. Partially Fluorinated Poly- p -xylylenes Synthesized by CVD Polymerization

Author: Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Macromolecular Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Material Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Material Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Macromolecular Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA)., Elkasabi, Yaseen, Nandivada, Himabindu, Chen, Hsien-Yeh, Bhaskar, Srijanani, D'Arcy, John, Bondarenko, Lidija, Lahann, Joerg, Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Macromolecular Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Material Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA), Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Material Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Macromolecular Science and Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA) ; Department of Chemical Engineering, University of Michigan 2300 Hayward Street Ann Arbor, MI 48109 (USA)., Elkasabi, Yaseen, Nandivada, Himabindu, Chen, Hsien-Yeh, Bhaskar, Srijanani, D'Arcy, John, Bondarenko, Lidija, and Lahann, Joerg
Abstract: This paper describes partially fluorinated poly- p -xylylenes prepared by CVD polymerization. The synthesis, characterization, and surface modification of two partially fluorinated polymer coatings, namely poly(4,12-dibromo-1,1,9,9-tetrafluoro- p -xylylene) ( 2 ) and poly(4-heptadecafluorononanoyl- p -xylylene-co- p -xylylene) ( 4 ), is described. Polymer 2 is synthesized from 4,12-dibromo-1,1,9,9-tetrafluoro[2.2]paracyclophane ( 1 ), which is fluorinated at the aliphatic bridge, while 4-heptadecafluorononanoyl[2.2]paracyclophane ( 3 ), which contains a perfluorinated keto group at the aromatic ring, is used to synthesize polymer 4 . Furthermore, the keto-functionalized polymer 4 introduces both extreme hydrophobicity and surface reactivity towards hydrazide-containing ligands.
Published: 2009

13. Substrate-Selective Chemical Vapor Deposition of Reactive Polymer Coatings J. L. gratefully acknowledges support from the NSF in form of a CAREER grant (DMR-0449462) and funding from the NSF under the MRI program (DMR 0420785). The project was further funded by an Idea Award of the Department of Defense. Supporting Information is available online from Wiley InterScience or from the authors.

Author: Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA), Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA) ; Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA)., Chen, Hsien-Yeh, Lai, Joseph Hermes, Jiang, Xuwei, Lahann, Joerg, Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA), Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA) ; Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering University of Michigan 2300 Hayward Street, Ann Arbor, MI 48109 (USA)., Chen, Hsien-Yeh, Lai, Joseph Hermes, Jiang, Xuwei, and Lahann, Joerg
Abstract: No Abstract.
Published: 2008

14. Thermal and mechanical cracking in bis(triisopropylsilylethnyl)pentacene thin films

Author: Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor, Michigan 48109, Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109 ; Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, Michigan 48109 ; Department of Biomedical Engineering, The University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Chemistry, The University of Kentucky, Lexington, Kentucky 40506, Chen, Jihua, Tee, Chee Keong, Yang, Junyan, Shaw, Charles, Shtein, Max, Martin, David C., Anthony, John, Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor, Michigan 48109, Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109 ; Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, Michigan 48109 ; Department of Biomedical Engineering, The University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Chemistry, The University of Kentucky, Lexington, Kentucky 40506, Chen, Jihua, Tee, Chee Keong, Yang, Junyan, Shaw, Charles, Shtein, Max, Martin, David C., and Anthony, John
Abstract: No abstract.
Published: 2008

15. Use of Air-Liquid Two-Phase Flow in Hydrophobic Microfluidic Channels for Disposable Flow Cytometers

Author: Department of Biomedical Engineering, University of Michigan, Ann Arbor, 3304; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Mechanical Engineering, University of Michigan, Ann Arbor, 2272; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Mechanical Engineering, University of Michigan, Ann Arbor, 2272; Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Ann Arbor, MI, 48109-2125; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Biomedical Engineering, University of Michigan, Ann Arbor, 3304; Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Ann Arbor, MI, 48109-2125; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Ann Arbor, Huh, Dongeun, Tung, Yi-Chung, Wei, Hsien-Hung, Grotberg, James B., Skerlos, Steven J., Kurabayashi, Katsuo, Takayama, Shuichi, Department of Biomedical Engineering, University of Michigan, Ann Arbor, 3304; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Mechanical Engineering, University of Michigan, Ann Arbor, 2272; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Mechanical Engineering, University of Michigan, Ann Arbor, 2272; Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Ann Arbor, MI, 48109-2125; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Department of Biomedical Engineering, University of Michigan, Ann Arbor, 3304; Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Ann Arbor, MI, 48109-2125; GG Brown, 2350 Hayward, Ann Arbor, MI, 48109-2125, Ann Arbor, Huh, Dongeun, Tung, Yi-Chung, Wei, Hsien-Hung, Grotberg, James B., Skerlos, Steven J., Kurabayashi, Katsuo, and Takayama, Shuichi
Abstract: This paper describes a disposable flow cytometer that uses an air-liquid two-phase microfluidic system to produce a focused high-speed liquid sample stream of particles and cells. The susceptibility of thin liquid columns to instabilities may suggest that focusing of sample liquids with streams of air would be difficult. The design of channel geometry, control of flow rates, and use of appropriate surface chemistries on the channel walls, however, enabled the generation of thin (15???100??m) and partially bounded sample streams that were stable and suitable for rapid cell analysis. Using an inverted epi-fluorescence microscope with a photo-multiplier tube, we demonstrated that the system is capable of counting the number of beads and C 2 C 12 myoblast cells. The effects of different flow rates and surface chemistries of the channel walls on the air-liquid two-phase flows were characterized using optical and confocal microscopy. Use of air instead of liquids as a sheath fluid eliminates the need for large sheath liquid reservoirs, and reduces the volume and weight requirements. The low manufacturing cost and high volumetric efficiency make the air-sheath flow cytometer attractive for use as a stand-alone device or as an integrated component of bio-artificial hybrid microsystems.
Published: 2006

16. Controlling molecular mobility and ductile-brittle transitions of polycarbonate copolymers

Author: Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, Chemistry Department, Washington University in St. Louis, St. Louis, Missouri 63130, Wu, Jinhuang, Xiao, Chaodong, Yee, Albert F., Klug, Christopher A., Schaefer, Jacob, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, Chemistry Department, Washington University in St. Louis, St. Louis, Missouri 63130, Wu, Jinhuang, Xiao, Chaodong, Yee, Albert F., Klug, Christopher A., and Schaefer, Jacob
Published: 2006

17. Polymers containing cyanoimidazole pendant groups

Author: Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, Allan, David S., Thurber, Ernest L., Rasmussen, Paul G., Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109 ; Macromolecular Science and Engineering Program and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, Allan, David S., Thurber, Ernest L., and Rasmussen, Paul G.
Abstract: Dicyanoimidazole (I) was attached to a polystyrene backbone in order to prepare polymers containing electron-accepting pendant groups to complement the existing body of electron-donating polymers. The preparation of poly[4,5-dicyano-1-(vinylbenzyl)imidazole] (III), poly[4,5-dicyano-1-(vinylbenzyl)imidazole-co-9-(vinylbenzyl) carbazole] and attempted polymerization of 4,5-dicyano-1-vinylimidazole are described. Cyclic voltammetry and charge transfer studies are used to characterize the electron-accepting strength of the cyanoimidazole model compounds. These studies show that while cyanoimidazoles are moderate electron acceptors, they do not form charge transfer complexes with the donor molecules investigated.
Published: 2006

18. Physical and chemical evolution of PMDA-ODA during thermal imidization

Author: Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136, Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136 ; Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136, Ojeda, Jaime R., Mobley, Juliana, Martin, David C., Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136, Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136 ; Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, 2022 H.H. Dow Bldg., 2300 Hayward Street, College of Engineering, The University of Michigan, Ann Arbor, Michigan 48109-2136, Ojeda, Jaime R., Mobley, Juliana, and Martin, David C.
Abstract: The processing of poly(imide) films from poly(amic acid) solutions involves the simultaneous loss of solvent and chemical conversion, and may involve structural reorganization such as orientation or crystallization. Here, we describe weight loss, solvent sorption. Fourier transform infrared (FTIR), and wide-angle x-ray scattering (WAXS) studies during thermal imidization of the commercially important poly(imide) PMDA-ODA. The results indicate that imidization proceeds nearly to completion before significant crystallization occurs. The experimental data are interpreted in terms of a triangular phase diagram that makes it possible to plot the processing pathway during the conversion from poly(amic acid) solution to solid poly(imide). In constructing this triangular phase diagram the extent of imidization (i.e., the composition of the poly(amic acid-co-imide) copolymers during conversion) is treated as an independent thermodynamic variable. The form of the triangular phase diagram can be predicted from the Flory-Huggins lattice theory of mixing. There is inevitably a two-phase region present due to the relatively poor solubility of the poly(imide) in the poly(amic acid) solvent (NMP). The specific processing pathway taken depends on the relative amount of solvent loss and imidization during conversion. Further details about the triangular phase diagrams of poly(imides) will require such studies as solvent swelling at intermediate stages of conversion. © 1995 John Wiley & Sons, Inc.
Published: 2006

19. Defect-mediated curvature and twisting in polymer crystals

Author: Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-2136. USA, Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-2136. USA ; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 41809-2136, USA, Ford Research Laboratory, P.O. Box 2053-MD 3182-SRL, Dearborn, Michigan 48121-2053, USA, Kübel, Christian, González-Ronda, Lebzylisbeth, Drummy, Lawrence F., Martin, David C., Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-2136. USA, Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-2136. USA ; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 41809-2136, USA, Ford Research Laboratory, P.O. Box 2053-MD 3182-SRL, Dearborn, Michigan 48121-2053, USA, Kübel, Christian, González-Ronda, Lebzylisbeth, Drummy, Lawrence F., and Martin, David C.
Abstract: Crystalline polymer solids almost inevitably exhibit defects due to chain ends, chain folding and the limited molecular mobility. The defects result in local (dislocations, grain boundaries) or global (bending, twisting) distortions of the molecular symmetry with pronounced implications on materials properties. Depending on the localization of the deformation, continuous molecular distortions or chain scission are expected, resulting in distinct differences for the mechanical (crack formation) and optoelectronic properties (charge transport and delocalization), which become especially important in the light of the recent extraordinary developments in molecular electronics. Further studies of defect structure and properties in polymers are expected to result in an increasingly sophisticated understanding of the microstructure and microstructural evolution during processing necessary to control and optimize the nano- and micrometerscale structure of organic materials. Copyright © 2000 John Wiley & Sons, Ltd.
Published: 2006

20. Chemically Orthogonal Three???Patch Microparticles

Author: Department of Biomedical Engineering, Chemical Engineering, Macromolecular Science and Engineering, Material Science and Engineering, University of Michigan, Ann Arbor, 48109 (USA) http://www.umich.edu/???lahannj/index.htm, Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von???Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen (Germany), Rahmani, Sahar, Saha, Sampa, Durmaz, Hakan, Donini, Alessandro, Misra, Asish C, Yoon, Jaewon, Lahann, Joerg, Department of Biomedical Engineering, Chemical Engineering, Macromolecular Science and Engineering, Material Science and Engineering, University of Michigan, Ann Arbor, 48109 (USA) http://www.umich.edu/???lahannj/index.htm, Institute of Functional Interfaces, Karlsruhe Institute of Technology, Hermann???von???Helmholtz???Platz 1, 76344 Eggenstein???Leopoldshafen (Germany), Rahmani, Sahar, Saha, Sampa, Durmaz, Hakan, Donini, Alessandro, Misra, Asish C, Yoon, Jaewon, and Lahann, Joerg
Abstract: Compared to two???dimensional substrates, only a few methodologies exist for the spatially controlled decoration of three???dimensional objects, such as microparticles. Combining electrohydrodynamic co???jetting with synthetic polymer chemistry, we were able to create two??? and three???patch microparticles displaying chemically orthogonal anchor groups on three distinct surface patches of the same particle. This approach takes advantage of a combination of novel chemically orthogonal polylactide???based polymers and their processing by electrohydrodynamic co???jetting to yield unprecedented multifunctional microparticles. Several micropatterned particles were fabricated displaying orthogonal click functionalities. Specifically, we demonstrate novel two??? and three???patch particles. Multi???patch particles are highly sought after for their potential to present multiple distinct ligands in a directional manner. This work clearly establishes a viable route towards orthogonal reaction strategies on multivalent micropatterned particles. Patchwork???Familie : Mikropartikel aus drei Patches (siehe Schema) mit funktionalisierten Poly(lactid)???Derivaten in ausgew??hlten Kompartimenten wurden durch elektrohydrodynamisches (EHD) Co???Spr??hen hergestellt. Die Mikropartikel wurden durch konfokale Raman???Mikrospektroskopie charakterisiert, und die bioorthogonale Oberfl??chenmodifikation eines jedes Patches wurde belegt.
Published: 2014

21. Microencapsulation of imidazole curing agent by solvent evaporation method using W/O/W emulsion

Author: Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA, Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361???763, Korea, Department of Chemical and Biomolecular Engineering, KAIST, Daejeon 305???701, Korea, Shin, Min Jae, Shin, Young Jae, Hwang, Seung Won, Shin, Jae Sup, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA, Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361???763, Korea, Department of Chemical and Biomolecular Engineering, KAIST, Daejeon 305???701, Korea, Shin, Min Jae, Shin, Young Jae, Hwang, Seung Won, and Shin, Jae Sup
Abstract: The epoxy???imidazole resin system is used to form the anisotropic conducting film. The latent character of the system is very significant. In this study, imidazole (Im) or 2???methylimidazole (2MI) was encapsulated for the latent curing system to use in the reaction of epoxy resin. Polycaprolactone was used as a wall material, and the solvent evaporation method was used to form the microcapsule using W/O/W emulsion. The shelf life of the microcapsules was studied for the epoxy resin, and the curing behavior of the microcapsules for epoxy resin was examined using a differential scanning calorimeter. The curing times at 150 and 180??C were estimated using an indentation method. The microcapsules of Im or 2MI exhibited a long shelf life for epoxy resin. When comparing the results of the previous methods with the results of this study using the W/O/W emulsion, finer microcapsules were formed and the microcapsule has longer shelf life. ?? 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Published: 2013

22. Lab???on???a???chip biophotonics: its application to assisted reproductive technologies

Author: Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI 48109, USA, Department of Urology, University of Michigan, Ann Arbor, MI 48109, USA, Department of Molecular and Integrated Physiology, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Division of Nano???Bio and Chemical Engineering WCU Project, UNIST, Ulsan, Republic of Korea, Mappes, Timo, Schmidt, Holger, Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI 48109, USA, Department of Urology, University of Michigan, Ann Arbor, MI 48109, USA, Department of Molecular and Integrated Physiology, University of Michigan, Ann Arbor, MI 48109, USA, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Division of Nano???Bio and Chemical Engineering WCU Project, UNIST, Ulsan, Republic of Korea, Mappes, Timo, and Schmidt, Holger
Abstract: With the benefits of automation, sensitivity and precision, microfluidics has enabled complex and otherwise tedious experiments. Lately, lab???on???a???chip (LOC) has proven to be a useful tool for enhancing non???invasive assisted reproductive technology (ART). Non???invasive gamete and embryo assessment has largely been through periodic morpohological assessment using optical microscopy and early LOC ART was the same. As we realize that morphological assessment is a poor indication of gamete or embryo health, more advanced biophotonics has emerged in LOC ART to assay for metabolites or gamete separation via optoelectrical tweezers. Off???chip, even more advanced biophotonics with broad spectrum analysis of metabolites and secretomes has been developed that show even higher accuracy to predicting reproductive potential. The integration of broad spectrum metabolite analysis into LOC ART is an exciting future that merges automation and sensitivity with the already highly accurate and strong predictive power of biophotonics. (?? 2012 WILEY???VCH Verlag GmbH & Co. KGaA, Weinheim)
Published: 2012

23. Re???Shaping the Coffee Ring

Author: Depts. of Chemical Engineering, Mechanical Engineering, Biomedical Engineering, and Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48103 (USA), Larson, Ronald G., Depts. of Chemical Engineering, Mechanical Engineering, Biomedical Engineering, and Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48103 (USA), and Larson, Ronald G.
Published: 2012

24. Chemically Controlled Bending of Compositionally Anisotropic Microcylinders

Author: Department of Mechanical Engineering, University of Michigan (USA), Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Saha, Sampa, Copic, Davor, Bhaskar, Srijanani, Clay, Nicholas, Donini, Alessandro, Hart, A. John, Lahann, Joerg, Department of Mechanical Engineering, University of Michigan (USA), Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Saha, Sampa, Copic, Davor, Bhaskar, Srijanani, Clay, Nicholas, Donini, Alessandro, Hart, A. John, and Lahann, Joerg
Published: 2012

25. Chemically Controlled Bending of Compositionally Anisotropic Microcylinders

Author: Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Department of Mechanical Engineering, University of Michigan (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Saha, Sampa, Copic, Davor, Bhaskar, Srijanani, Clay, Nicholas, Donini, Alessandro, Hart, A. John, Lahann, Joerg, Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA), Department of Mechanical Engineering, University of Michigan (USA), Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109 (USA), Saha, Sampa, Copic, Davor, Bhaskar, Srijanani, Clay, Nicholas, Donini, Alessandro, Hart, A. John, and Lahann, Joerg
Published: 2012

26. Polymer Scaffolds for Small-Diameter Vascular Tissue Engineering

Author: Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA), Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA) ; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109 (USA) ; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI, 48109 (USA) ; Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA)., Ma, Haiyun, Hu, Jiang, Ma, Peter X., Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA), Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA) ; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109 (USA) ; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI, 48109 (USA) ; Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, MI 48109-1078 (USA)., Ma, Haiyun, Hu, Jiang, and Ma, Peter X.
Abstract: To better engineer small-diameter blood vessels, a few types of novel scaffolds are fabricated from biodegradable poly( L -lactic acid) (PLLA) by means of thermally induced phase-separation (TIPS) techniques. By utilizing the differences in thermal conductivities of the mold materials and using benzene as the solvent scaffolds with oriented gradient microtubular structures in the axial or radial direction can be created. The porosity, tubular size, and the orientational direction of the microtubules can be controlled by the polymer concentration, the TIPS temperature, and by utilizing materials of different thermal conductivities. These gradient microtubular structures facilitate cell seeding and mass transfer for cell growth and function. Nanofibrous scaffolds with an oriented and interconnected microtubular pore network are also developed by a one-step TIPS method using a benzene/tetrahydrofuran mixture as the solvent without the need for porogen materials. The structural features of such scaffolds can be conveniently adjusted by varying the solvent ratio, phase-separation temperature, and polymer concentration to mimic the nanofibrous features of an extracellular matrix. These scaffolds were fabricated for the tissue engineering of small-diameter blood vessels by utilizing their advantageous structural features to facilitate blood-vessel regeneration.
Published: 2010

27. Electrodeposition on Nanofibrous Polymer Scaffolds: Rapid Mineralization, Tunable Calcium Phosphate Composition and Topography

Author: Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA ; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering and Biological Engineering, Donghua University, Shanghai, 201620, P. R. China, Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA, Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA ; Department of Biomedical Engineering, Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI, 48109, USA ; Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA., He, Chuanglong, Xiao, Guiyong, Jin, Xiaobing, Sun, Chenghui, Ma, Peter X., Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA ; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering and Biological Engineering, Donghua University, Shanghai, 201620, P. R. China, Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA, Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA ; Department of Biomedical Engineering, Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI, 48109, USA ; Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109, USA., He, Chuanglong, Xiao, Guiyong, Jin, Xiaobing, Sun, Chenghui, and Ma, Peter X.
Abstract: A straightforward, fast and versatile technique to fabricate mineralized nanofibrous polymer scaffolds for bone regeneration is developed. Nanofibrous poly( L -lactic acid) scaffolds are fabricated using both electrospinning and phase separation techniques. An electrodeposition process is designed to deposit calcium phosphate on the nanofibrous scaffolds. Such scaffolds contain a high quality mineral coating on the fiber surface and have surface topography and chemical composition that are tunable by varying the processing parameters. These scaffolds can mimic the composition and structure of the natural bone extracellular matrix and provide a more biocompatible interface for bone regeneration.
Published: 2010

28. Electro-Optical Materials: Electrically Addressable Hybrid Architectures of Zinc Oxide Nanowires Grown on Aligned Carbon Nanotubes (Adv. Funct. Mater. 15/2010)

Author: Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA), Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA) ; Macromolecular Science and Engineering Research Center Department of Materials Science and Engineering, University of Michigan 2455 Hayward Street, Ann Arbor, MI 48109 (USA), Electron Microbeam Analysis Laboratory Department of Materials Science and Engineering, University of Michigan 2455 Hayward Street, Ann Arbor, MI 48109 (USA), Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA) ; Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA), Ok, Jong G., Tawfick, Sameh H., Juggernauth, K. Anne, Sun, Kai, Zhang, Yongyi, Hart, A. John, Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA), Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA) ; Macromolecular Science and Engineering Research Center Department of Materials Science and Engineering, University of Michigan 2455 Hayward Street, Ann Arbor, MI 48109 (USA), Electron Microbeam Analysis Laboratory Department of Materials Science and Engineering, University of Michigan 2455 Hayward Street, Ann Arbor, MI 48109 (USA), Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA) ; Mechanosynthesis Group Department of Mechanical Engineering, University of Michigan 2350 Hayward Street, Ann Arbor, MI 48109 (USA), Ok, Jong G., Tawfick, Sameh H., Juggernauth, K. Anne, Sun, Kai, Zhang, Yongyi, and Hart, A. John
Abstract: No Abstract.
Published: 2010

29. Neutral and Oxidized Triisopropylsilyl End-Capped Oligothienoacenes: A Combined Electrochemical, Spectroscopic, and Theoretical Study

Author: Instituto de Ciencia Molecular, Universidad de Valencia, Valencia 46980 (Spain), Fax: (+34)???963543274, Department of Physical Chemistry, University of M??laga, 29071 M??laga (Spain), Fax: (+34)???952-132000, Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University, Ann Arbor, Michigan 48109-1055 (USA), Istituto CNR per l'Energetica e le Interfasi, c.o. Stati Uniti 4, 35127 Padova (Italy), Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602 Nagoya (Japan), Arag??, Juan, Viruela, Pedro, Ort??, Enrique, Malav??, Reyes, Vercelli, Barbara, Zotti, Gianni, Hern??ndez, V??ctor, L??pez Navarrete, Juan, Henssler, John, Matzger, Adam, Suzuki, Yoshitake, Yamaguchi, Shigehiro, Instituto de Ciencia Molecular, Universidad de Valencia, Valencia 46980 (Spain), Fax: (+34)???963543274, Department of Physical Chemistry, University of M??laga, 29071 M??laga (Spain), Fax: (+34)???952-132000, Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University, Ann Arbor, Michigan 48109-1055 (USA), Istituto CNR per l'Energetica e le Interfasi, c.o. Stati Uniti 4, 35127 Padova (Italy), Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, 464-8602 Nagoya (Japan), Arag??, Juan, Viruela, Pedro, Ort??, Enrique, Malav??, Reyes, Vercelli, Barbara, Zotti, Gianni, Hern??ndez, V??ctor, L??pez Navarrete, Juan, Henssler, John, Matzger, Adam, Suzuki, Yoshitake, and Yamaguchi, Shigehiro
Abstract: This work presents an analysis of the structural, electrochemical, and optical properties of a family of triisopropylsilyl end-capped oligothienoacenes (TIPS- T n -TIPS, n =4???8) by combining cyclic voltammetry, spectroscopic techniques, and quantum-chemical calculations. TIPS- T n -TIPS compounds form stable radical cations, and dications are only obtained for the longest oligomers ( n =7 and 8). Oxidation leads to the quinoidization of the conjugated backbone, from which electrons are mainly extracted. The absorption and fluorescence spectra show partially resolved vibronic structures even at room temperature, due to the rigid molecular geometry. Two well-resolved vibronic progressions are observed at low temperatures due to the vibronic coupling, with normal modes showing wavenumbers of ???1525 and ???480???14cm ???1 . Optical absorption bands display remarkable bathochromic dispersion with the oligomer length, indicative of the extent of ?? conjugation. The optical properties of the oxidized compounds are characterized by in situ UV/Vis/NIR spectroelectrochemistry. The radical cation species show two intense absorption bands emerging at energies lower than in the neutral compounds. The formation of the dication is only detected for the heptamer and the octamer, and shows a new band at intermediate energies. Optical data are interpreted with the help of density functional theory calculations performed at the B3LYP/6-31G** level, both for the neutral and the oxidized compounds.
Published: 2010

30. Oxidation of End-Capped Pentathienoacenes and Characterization of Their Radical Cations

Author: Departamento de QuÍmica FÍsica, Universidad de MÁlaga, 29071 MÁlaga (Spain), Fax: (+34) 952 132000, Institute for Energetics and Interphases–IENI CNR, C.so Stati Uniti 4, 35127 Padova (Italy), Fax: (+39) 049 8295853, Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University, Ann Arbor, MI 48109-1055 (USA), Departamento de QuÍmica FÍsica, Universidad de MÁlaga, 29071 MÁlaga (Spain), Fax: (+34) 952 132000 ; Current address: School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332-0400 (USA), Departament de QuÍmica FÍsica and IQTCUB, Facultad de QuÍmica, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona (Spain), Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602 (Japan), Malavé, Reyes, Ruiz Delgado, M. carmen, Hernández, Víctor, López navarrete, Juan, Vercelli, Barbara, Zotti, Gianni, Novoa, Juan, Suzuki, Yoshitake, Yamaguchi, Shigehiro, Henssler, John, Matzger, Adam, Departamento de QuÍmica FÍsica, Universidad de MÁlaga, 29071 MÁlaga (Spain), Fax: (+34) 952 132000, Institute for Energetics and Interphases–IENI CNR, C.so Stati Uniti 4, 35127 Padova (Italy), Fax: (+39) 049 8295853, Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University, Ann Arbor, MI 48109-1055 (USA), Departamento de QuÍmica FÍsica, Universidad de MÁlaga, 29071 MÁlaga (Spain), Fax: (+34) 952 132000 ; Current address: School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332-0400 (USA), Departament de QuÍmica FÍsica and IQTCUB, Facultad de QuÍmica, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona (Spain), Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602 (Japan), Malavé, Reyes, Ruiz Delgado, M. carmen, Hernández, Víctor, López navarrete, Juan, Vercelli, Barbara, Zotti, Gianni, Novoa, Juan, Suzuki, Yoshitake, Yamaguchi, Shigehiro, Henssler, John, and Matzger, Adam
Abstract: A detailed investigation of the optical and electrochemical properties of two pentathienoacene derivatives, 2,6-bis(trimethylsilyl)-Α-pentathienoacene ( TMS-T5-TMS ) and 2,6-bis(triisopropylsilyl)-Α-pentathienoacene ( TIPS-T5-TIPS ), as the neutral and oxidized species was performed in the temperature range of 80–300 14K. The experimental solution UV/Vis and solid-state Raman spectra were interpreted by using time-dependent DFT and DFT quantum chemical calculations at the B3LYP/6-31G** level. Bond lengths, HOMO–LUMO positions, and charge distribution were also predicted by computational methods for both the neutral and oxidized states of each thienoacene. As evidenced by ESR and spectroelectrochemical data, upon oxidation the pentathienoacene derivative with the less sterically hindering trimethylsilyl solubilizing groups, TMS-T5-TMS , undergoes Π 14dimerization to form [ TMS-T5-TMS ] 2 2+ . In contrast, TIPS-T5-TIPS , with the more bulky triisopropylsilyl solubilizing groups, was oxidized to the radical cation but dimerization was prevented due to steric interactions. These experimental observations are supported by DFT calculations, which were used to investigate [ TMS-T5-TMS ] 2 2+ and [ TIPS-T5-TIPS ] 2 2+ Π 14dimers in the solid state and in solution. The redox potentials and absorption peak locations corresponding to the radical cations and Π 14dimer of TMS-T5-TMS were identified experimentally.
Published: 2009

31. Unmasking a Third Polymorph of a Benchmark Crystal-Structure-Prediction Compound

Author: Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109-1055 (USA), Fax: (+1)???734-615-8853, Roy, Saikat, Matzger, Adam J., Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109-1055 (USA), Fax: (+1)???734-615-8853, Roy, Saikat, and Matzger, Adam J.
Abstract: No Abstract
Published: 2009

32. Organic Solar Cells Using Nanoimprinted Transparent Metal Electrodes This work was supported in part by NSF and KACST. The authors thank Prof. Max Shtein for allowing us to use the metal evaporator for organic solar cell fabrication.

Author: Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA), Department of Materials Science and Engineering, Chemical Engineering, Macromolecular Science and Engineering, The University of Michigan 2300 Hayward St., Ann Arbor, MI 48109 (USA), Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA) ; Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA)., Kang, Myung-Gyu, Kim, Myung-Su, Kim, Jinsang, Guo, L. Jay, Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA), Department of Materials Science and Engineering, Chemical Engineering, Macromolecular Science and Engineering, The University of Michigan 2300 Hayward St., Ann Arbor, MI 48109 (USA), Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA) ; Department of Electrical Engineering and Computer Science, The University of Michigan 1301 Beal Ave., Ann Arbor, MI48109 (USA)., Kang, Myung-Gyu, Kim, Myung-Su, Kim, Jinsang, and Guo, L. Jay
Abstract: No Abstract.
Published: 2009

33. A Crystalline Mesoporous Coordination Copolymer with High Microporosity This work was supported by the US Department of Energy through the National Energy Technology Laboratory, under Award No. DE-FG26-04NT42121.

Author: Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Ave, Ann Arbor, MI 48109-1055, USA, Fax: (+1)???734-6715-8853, Koh, Kyoungmoo, Wong-Foy, Antek G., Matzger, Adam J., Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Ave, Ann Arbor, MI 48109-1055, USA, Fax: (+1)???734-6715-8853, Koh, Kyoungmoo, Wong-Foy, Antek G., and Matzger, Adam J.
Abstract: No Abstract
Published: 2008

34. Mechanical properties of polyurethane/montmorillonite nanocomposite prepared by melt mixing

Author: Materials Science and Engineering, Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea ; Intelligent Textile System Research Center, Seoul, Korea ; Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea, Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea ; Intelligent Textile System Research Center, Seoul, Korea, Intelligent Textile System Research Center, Seoul, Korea ; Department of Chemistry, The University of Suwon, Hwasungshi, Korea, Venture and Core R&D, Analytical Sciences Laboratory, Dow Chemical, Midland, Michigan 48667, Chun, Byoung Chul, Cho, Tae Keun, Chong, Mi Hwa, Chung, Yong-Chan, Chen, Jihua, Martin, David, Cieslinski, Robert C., Materials Science and Engineering, Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, Michigan 48109, Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea ; Intelligent Textile System Research Center, Seoul, Korea ; Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea, Department of Polymer Engineering, The University of Suwon, Hwasungshi, Korea ; Intelligent Textile System Research Center, Seoul, Korea, Intelligent Textile System Research Center, Seoul, Korea ; Department of Chemistry, The University of Suwon, Hwasungshi, Korea, Venture and Core R&D, Analytical Sciences Laboratory, Dow Chemical, Midland, Michigan 48667, Chun, Byoung Chul, Cho, Tae Keun, Chong, Mi Hwa, Chung, Yong-Chan, Chen, Jihua, Martin, David, and Cieslinski, Robert C.
Abstract: Nanocomposites from polyurethane (PU) and montmorillonite (MMT) were prepared under melt-mixing condition, by a twin screw extruder along with a compatibilizer to enhance dispersion of MMT. MMT used in this study was Cloisite 25A (modified with dimethyl hydrogenated tallow 2-ethylhexyl ammonium) or Cloisite 30B (modified with methyl tallow bis-2-hydroxyethyl ammonium). Maleic anhydride grafted polypropylene (MAPP) was used as the compatibilizer. XRD and TEM analysis demonstrated that melt mixing by a twin-screw extruder was effective in dispersing MMT through the PU matrix. The PU/Cloisite 30B composite exhibited better interlayer separation than the PU/Cloiste 25A composite. Nanoparticle dispersion was the best at 1 wt % of MMT and improved with compatibilizer content for both composites. Properties of the composites such as complex viscosity and storage modulus were higher than that of a pure PU matrix and increased with the increase in MMT content, but decreased with the increase in compatibilizer content. ?? 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Published: 2007

35. Cover Picture: Multipotent Polymer Coatings Based on Chemical Vapor Deposition Copolymerization (Adv. Mater. 12/2006)

Author: Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA, Elkasabi, Y., Chen, H. -Y., Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA, Elkasabi, Y., and Chen, H. -Y.
Abstract: The cover shows that chemical vapor deposition can be used to prepare copolymer thin films, on varying substrates, that can bind two different ligands with high selectivity. In work reported by Lahann and co-workers on p. 1521, the actual ligand ratios on the surface can be controlled by varying the copolymer composition. This technology may find applications in biomedical devices, high-throughput screening platforms, microfluidic analysis devices, and diagnostic platforms.
Published: 2007

36. Multipotent Polymer Coatings Based on Chemical Vapor Deposition Copolymerization JL gratefully acknowledges support from the NSF in form of a CAREER grant (DMR-0449462) and a Major Instrumentation Grant (DMR-0420785). The authors thank Dr.???Erdogan???Gulari, University of Michigan, for use of the fluorescence scanner. Supporting Information is available online from Wiley InterScience or from the author.

Author: Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA, Elkasabi, Y., Chen, H. -Y., Departments of Chemical Engineering, Materials Science and Engineering, and Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA, Elkasabi, Y., and Chen, H. -Y.
Abstract: No abstract.
Published: 2007

37. Surface modification of interconnected porous scaffolds

Author: Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078, Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078 ; Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109-1078 ; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-1078 ; Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078, Liu, Xiaohua, Won, Youngjun, Ma, Peter X., Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078, Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078 ; Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109-1078 ; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, Michigan 48109-1078 ; Department of Biologic and Materials Sciences, 1011 North University Ave., Room 2211, The University of Michigan, Ann Arbor, Michigan 48109-1078, Liu, Xiaohua, Won, Youngjun, and Ma, Peter X.
Published: 2006

38. Aligned microstructure of some particulate polymer composites obtained with an electric field

Author: Macromolecular Science and Engineering Center and Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Robertson, Richard E., Park, C., Macromolecular Science and Engineering Center and Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Robertson, Richard E., and Park, C.
Abstract: Alignment by an electric field was obtained for a variety of particles dispersed in photopolymerizable fluids. The particle shapes studied were irregular, spherical, rhombohedral, rod-like (fibres), and platelet. The sizes ranged from sub-micrometres to tens of micrometres, and the dielectric constants of the particles varied from less than that of the lquid matrix to very much greater than that of the matrix. Polymerization or hardening of the matrix was possible at room temperature, required only a few seconds, and the aligned structures obtained were able to be examined by both light and scanning electron microscopy after fracture or sectioning. Nominally equiaxed particles, containing a statistical proportion of non-equiaxed particles, could be completely aligned at 48 vol% concentration in a fluid having a viscosity of about 2.5 Pa s, but at 57 vol%, the mixture behaved as a paste, and only particle rotation and local rearrangements were possible. The rate of alignment seemed to depend generally on the magnitude of??1(a??)2, where??1 is the relative dielectric constant of the liquid resin, a is the particle radius, and?? is the particle dipole coefficient given by (??2?????1)/(??2+2??1), where??2 is the relative dielectric constant of the particles.??1(a??)2 emphasizes the importance of particle size and the relative unimportance of the particle dielectric constant for alignment, except when??2?????1. Platelets were more rapidly aligned than fibres.
Published: 2006

39. Chronic neural recordings using silicon microelectrode arrays electrochemically deposited with a poly(3,4-ethylenedioxythiophene) (PEDOT) filmThis work was supported by the Center for Wireless Integrated Microsystems NSF EEC-9986866 and the Whitaker Foundation.

Author: Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109, USA, Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA, Dow Chemical Co., Freeport, TX 77541, USA, Ann Arbor, Ludwig, Kip A., Uram, Jeffrey D., Yang, Junyan, Martin, David C., Kipke, Daryl R., Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA, Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109, USA, Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA, Dow Chemical Co., Freeport, TX 77541, USA, Ann Arbor, Ludwig, Kip A., Uram, Jeffrey D., Yang, Junyan, Martin, David C., and Kipke, Daryl R.
Abstract: Conductive polymer coatings can be used to modify traditional electrode recording sites with the intent of improving the long-term performance of cortical microelectrodes. Conductive polymers can drastically decrease recording site impedance, which in turn is hypothesized to reduce thermal noise and signal loss through shunt pathways. Moreover, conductive polymers can be seeded with agents aimed at promoting neural growth toward the recording sites or minimizing the inherent immune response. The end goal of these efforts is to generate an ideal long-term interface between the recording electrode and surrounding tissue. The goal of this study was to refine a method to electrochemically deposit surfactant-templated ordered poly(3,4-ethylenedioxythiophene) (PEDOT) films on the recording sites of standard ‘Michigan’ probes and to evaluate the efficacy of these modified sites in recording chronic neural activity. PEDOT-coated site performance was compared to control sites over a six-week evaluation period in terms of impedance spectroscopy, signal-to-noise ratio, number of viable unit potentials recorded and local field potential recordings. PEDOT sites were found to outperform control sites with respect to signal-to-noise ratio and number of viable unit potentials. The benefit of reduced initial impedance, however, was mitigated by the impedance contribution of typical silicon electrode encapsulation. Coating sites with PEDOT also reduced the amount of low-frequency drift evident in local field potential recordings. These findings indicate that electrode sites electrochemically deposited with PEDOT films are suitable for recording neural activity in vivo for extended periods. This study also provided a unique opportunity to monitor how neural recording characteristics develop over the six weeks following implantation.
Published: 2006

40. Effect of rubber interlayers on the fracture of glass bead/epoxy composites

Author: Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Lee, Jonghwi, Yee, Albert F., Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Lee, Jonghwi, and Yee, Albert F.
Abstract: The effectiveness of rubber interlayers between inorganic particles and polymer matrix for toughening has been a controversial subject. In this research, a series of rubber-encapsulated glass beads and its epoxy composites were prepared, and underlying mechanisms which can connect material parameters related with rubber interlayers with energy dissipation mechanisms, were investigated. The critical stress intensity factor (K IC) and critical strain energy release rate (G IC) of rubber-encapsulated glass bead filled epoxies were found to insignificantly depend on the existence and thickness of rubber interlayers. Microscopy studies on fracture process identified four different micro-mechanical deformations which can dissipate fracture energy: step formation, micro-shear banding, debonding of glass beads, and diffuse matrix shear yielding. It was found that the first two became less extensive and the others became more extensive as the thickness of rubber interlayers increases. This offsetting effect of micro-mechanical deformations seems to be the reason for the absence of significant toughening effect of rubber interlayers.
Published: 2006

41. Possible phase transformation toughening of thermoset polymers by poly(butylene terephthalate)

Author: Macromolecular Science and Engineering Center, and Department of Materials Science and Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA, Ann Arbor, Robertson, Richard E., Kim, Junkyung, Macromolecular Science and Engineering Center, and Department of Materials Science and Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA, Ann Arbor, Robertson, Richard E., and Kim, Junkyung
Abstract: Mechanisms were explored by which particles of poly(butylene terephthalate) (PBT) are able to toughen a brittle epoxy. The epoxy studied was an aromatic amine-cured diglycidyl ether of bisphenol-A, which was toughened at about twice the rate with particles of poly(butylene terephthalate) as with particles of nylon 6, poly(vinylidene fluoride), or CTBN rubber. Many of the mechanisms of toughening are visible on the fracture surface of the PBT-epoxy blend, but a mechanism suggested to account for perhaps half of the increased toughness with PBT, phase transformation toughening, is not. The two types of experiment performed to detect phase transformation toughening were: (1) measurements of the rubber cavitation zone in PBT-CTBN rubber-epoxy ternary blends, which would detect an expansion of the PBT particles during fracture if it occurred, and (2) measurements of the fracture energy in PBT-epoxy blends in which the various mechanisms of toughening were selectively suppressed. Both types of experiment indicated the occurrence of phase transformation toughening in these PBT-epoxy blends.
Published: 2006

42. Viscoelastic behaviour of macro-defect-free cement

Author: Macromolecular Science and Engineering Center, and Department of Materials Science and Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA, Ann Arbor, Chu, Tun -Jen, Robertson, Richard E., Macromolecular Science and Engineering Center, and Department of Materials Science and Engineering, The University of Michigan, 48109, Ann Arbor, MI, USA, Ann Arbor, Chu, Tun -Jen, and Robertson, Richard E.
Abstract: The viscoelastic behaviour of macro-defect-free (MDF) cement was studied by dynamic mechanical analysis. MDF specimens with various moisture contents in the range 1.70%???3.20% moisture, were measured at 1 Hz as a function of temperature from 34???96??C and as a function of frequency from 0.05???5 Hz at 34??C. The viscoelasticity of MDF was found to be affected by moisture content through its plasticizing effect on the PVA binder. Time-moisture and temperature-moisture superposition of the shear moduli were found to be possible for MDF, and linear relationships between log time and linear moisture and between temperature and moisture were found. How the microstructure of MDF affects the viscoelastic response is also discussed through mechanical models. A comparison of the models with known experimental data suggests that the viscoelastic response arises from both direct connections between the inorganic particles and from connections through the polymer binder. Inorganic links are estimated to connect 45% of the inorganic phase.
Published: 2006

43. A study of a C??,?? -didehydroalanine homo-oligopeptide series in the solid-state by 13 C cross-polarization magic angle spinning NMR

Author: Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Biophysics Research Division, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry, Faculty of Science and Technology, Kinki University, Osaka 577, 8502 Japan, Institute of Biomolecular Chemistry, CNR, Department of Organic Chemistry, University of Padova, 35131 Padova, Italy, Henzler Wildman, Katherine A., Ramamoorthy, Ayyalusamy, Wakamiya, Tateaki, Yoshikawa, Taichi, Crisma, Marco, Toniolo, Claudio, Formaggio, Fernando, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Biophysics Research Division, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA ; Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry, Faculty of Science and Technology, Kinki University, Osaka 577, 8502 Japan, Institute of Biomolecular Chemistry, CNR, Department of Organic Chemistry, University of Padova, 35131 Padova, Italy, Henzler Wildman, Katherine A., Ramamoorthy, Ayyalusamy, Wakamiya, Tateaki, Yoshikawa, Taichi, Crisma, Marco, Toniolo, Claudio, and Formaggio, Fernando
Abstract: The fully extended peptide conformation (2.0 5 -helix) has been investigated for the first time in the solid-state by 13 C cross-polarization magic angle spinning NMR. The compounds examined are members of a terminally protected, homo-oligopeptide series (from monomer through hexamer) based on C??,?? -didehydroalanine. Copyright?? 2004 European Peptide Society and John Wiley & Sons, Ltd.
Published: 2006

44. Synthesis and assignments of regioisomeric cyanoimidazole esters

Author: Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109 U.S.A., Macromolecular Science and Engineering, The University of Michigan, Ann Arbor, MI 48109 U.S.A., Subrayan, Ramachandran P., Thurber, Ernest L., Rasmussen, Paul G., Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109 U.S.A., Macromolecular Science and Engineering, The University of Michigan, Ann Arbor, MI 48109 U.S.A., Subrayan, Ramachandran P., Thurber, Ernest L., and Rasmussen, Paul G.
Abstract: Regioassignments of ethyl cyanoimidazolecarboxylates have been performed by the nuclear Overhauser effect(NOE) studies on the regioisomeric monocyanoimidazoles obtained by the hydrolysis of the esters followed by decarboxylation. Alternately, regioassignment could also be carried out by comparing the chemical shifts of the N-methyl groups.
Published: 2006

45. Electron donors and cyanoimidazole acceptors: Cyclic voltammetry and molecular orbital study

Author: Department of Chemistry and Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI 48109, U.S.A., Allan, David S., Bergstrom, Debora F., Rasmussen, Paul G., Department of Chemistry and Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI 48109, U.S.A., Allan, David S., Bergstrom, Debora F., and Rasmussen, Paul G.
Abstract: Voltammetric measurements on a series of cyanoimidazoles and their metal complexes are reported and compared with those for various donors and acceptors measured under the same conditions. LUMO energies from extended Huckel calculations correlate well with reduction potentials of cyanoimidazoles. Extended Huckel calculations also give insights into the interaction of the metal complexes of tetracyanobiimidazole and the nature of molecular stacking.
Published: 2006

46. Effect of composition on molecular alignment in polyethylene terephthalate copolymers

Author: Macromolecular Science and Engineering Program, Department of Chemical Engineering, The University of Michigan, Ann Arbor, Michigan 48109, USA, Wang, C.S., Yeh, Gregory S.Y., Macromolecular Science and Engineering Program, Department of Chemical Engineering, The University of Michigan, Ann Arbor, Michigan 48109, USA, Wang, C.S., and Yeh, Gregory S.Y.
Abstract: In this study molecular alignment in copolymers of polyethylene terephthalate (PET) and p-hydroxybenzoic acid (PHB) was examined by means of differential radial distribution function (DRDF) analysis of wide angle X-ray scattering data. The study was carried out using two representative copolymers with the PHB content of 30 and 60 mol%. The DRDF curves for the amorphous and the partially crystalline samples of these copolymers showed periodic intermolecular peaks up to various radial distances. The appearance of these peaks at ~5 A periodicity suggested the existence of more-or-less parallel chain segments in the copolymers. The extent of the lateral molecular organization was ~15 and 30 A for the amorphous copolymers containing 30 and 60 mol% PHB, respectively. A substantial structural difference was therefore shown for the copolymers in this composition range. The DRDF curve for the amorphous copolymer with 30 mol% PHB was found to be very similar to that for the previously reported glassy PET with 0 mol% PHB, indicating that the two materials had almost the same intermolecular structure. The structural information revealed by these DRDF results was in agreement with the various property changes caused by varying PHB contents of the copolymers.
Published: 2006

47. Solvolytic Degradation of Polymeric Propellant Binders

Author: FLORIDA UNIV GAINESVILLE CENTER FOR MACROMOLECULAR SCIENCE AND ENGINEERING, Kaufman, M. S., Veazey, R. L., Zampini, A., Page, S. B., Butler, G. B., FLORIDA UNIV GAINESVILLE CENTER FOR MACROMOLECULAR SCIENCE AND ENGINEERING, Kaufman, M. S., Veazey, R. L., Zampini, A., Page, S. B., and Butler, G. B.
Abstract: The effect of various catalysts on the rate of solvolysis of the polyester and polyurethane binders in butylamine was studied. Polymer binders in propellants usually constitute from 16 to 20% of the total weight of the propellant. The remaining 84-80% is generally made up of oxidizer, usually (in Polaris motors) ammonium perchlorate (AP) 60-82%, aluminum metal, 2-18%, and stabilizers, 0-1%. The binders of chief concern at present (in Polaris motors) appear to be one of two types: (1) polyurethanes or (2) cured polybutadiene prepolymers. The problem of disposing of obsolete propellants is a formidable one because of the legal limitations on burning and dumping. The product gases from burning would cause serious pollution of the atmosphere and other possible means of disposal also present problems.
Published: 1975

48. Photon Management through Virus-Programmed Supramolecular Arrays

Author: Steinmetz, Nicole [Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave. Cleveland OH 44106 USA, Department of Materials Science and Engineering, Case Western Reserve University, 10900 Euclid Ave. Cleveland OH 44106 USA, Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Ave. Cleveland OH 44106 USA, Department of Radiology, Case Western Reserve University, 10900 Euclid Ave. Cleveland OH 44106 USA, Division of General Medical Sciences-Oncology, Case Western Reserve University, 10900 Euclid Ave. Cleveland OH 44106 USA]
Published: 2017
Full Text: View/download PDF

49. D 5h [PhSiO 1.5 ] 10 synthesis via F - catalyzed rearrangement of [PhSiO 1.5 ] n . An experimental/computational analysis of likely reaction pathways

Author: Laine, Richard [Macromolecular Science and Engineering Center; University of Michigan; Ann Arbor, USA; Department of Materials Sci. and Eng.; University of Michigan]
Published: 2016
Full Text: View/download PDF

50. Correction to: Physical aging of multilayer polymer films—influence of layer thickness on enthalpy relaxation process, effect of confinement

Author: Khadidja Arabeche, Laurent Delbreilh, Eric Baer, Macromolecule Research Laboratory (MRL), Université Aboubekr Belkaid - University of Belkaïd Abou Bekr [Tlemcen], Groupe de physique des matériaux (GPM), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Department of Macromolecular Science and Engineering, and Case Western Reserve University [Cleveland]
Subjects: [PHYS]Physics [physics], Polymers and Plastics, Organic Chemistry, Materials Chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience
Published: 2022

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

1,594 results on '"Macromolecular Science and Engineering"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources