39 results on '"YE TIAN"'
Search Results
2. Large-Scale Metal–Organic Framework Nanoparticle Monolayers with Controlled Orientation for Selective Transport of Rare-Earth Elements
- Author
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Ming Qiu, Zhongpeng Zhu, Dianyu Wang, Zhe Xu, Weining Miao, Lei Jiang, and Ye Tian
- Subjects
Colloid and Surface Chemistry ,General Chemistry ,Biochemistry ,Catalysis - Published
- 2023
3. Programmable Cocrystallization of DNA Origami Shapes
- Author
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Lizhi Dai, Lei Wang, Jiliang Liu, Ye Tian, and Min Ji
- Subjects
Surface Properties ,Thin layer ,Structural diversity ,Nanotechnology ,Crystallography, X-Ray ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Lattice (order) ,Scattering, Small Angle ,DNA origami ,Anisotropy ,Mechanical Phenomena ,Chemistry ,Anisotropic nanoparticles ,DNA ,General Chemistry ,Silicon Dioxide ,0104 chemical sciences ,Complementarity (molecular biology) ,Nanoparticles - Abstract
Assembly of distinct types of species, particularly possessing anisotropic configurations, is the premise to broaden structural diversity and explore materials' collective properties. However, it remains a great challenge to programmably cocrystallize manifold anisotropic nanoparticles with the desired assembly mode, because it requires not only the complementarity of both sizes and shapes but also the control over their directional interactions. Here, by introducing DNA origami technique into lattice engineering, we synthesize two types of DNA nano-objects with different symmetries and program the heterogeneous functional patches precisely on their surfaces with nanometer-level precision, which could guide further assembly of these nano-objects. We show that these anisotropic DNA nano-objects could be cocrystallized along specified modes via modulating the combination of surface patches. The highly ordered DNA crystals were thoroughly evidenced by techniques including small-angle X-ray scattering and electron microscopy after careful encapsulation of a thin layer of silica on these DNA nano-objects. Our strategy endows distinct shapes of organic DNA origami structures with regulation features to control the sophisticated modes of cocrystallization of these diverse components, laying a foundation for designing and fabricating customized three-dimensional structures with given optical and mechanical properties.
- Published
- 2020
4. Dissociative and Associative Concerted Mechanism for Ammonia Synthesis over Co-Based Catalyst
- Author
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Ye, Tian-Nan, primary, Park, Sang-Won, additional, Lu, Yangfan, additional, Li, Jiang, additional, Wu, Jiazhen, additional, Sasase, Masato, additional, Kitano, Masaaki, additional, and Hosono, Hideo, additional
- Published
- 2021
- Full Text
- View/download PDF
5. Bioinspired Heterogeneous Ion Pump Membranes: Unidirectional Selective Pumping and Controllable Gating Properties Stemming from Asymmetric Ionic Group Distribution
- Author
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Ye Tian, Liping Wen, Zhen Zhang, Lei Jiang, Pei Li, Yongchao Qian, Ganhua Xie, Xiang-Yu Kong, and Ziqi Wang
- Subjects
Polymers ,Biosensing Techniques ,Ion Pumps ,02 engineering and technology ,Gating ,engineering.material ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,Ion ,Colloid and Surface Chemistry ,Coating ,Biomimetic Materials ,Nanotechnology ,Energy transformation ,Ion transporter ,Ion Transport ,Chemistry ,business.industry ,Membranes, Artificial ,General Chemistry ,021001 nanoscience & nanotechnology ,Nanostructures ,0104 chemical sciences ,Membrane ,Ion pump ,engineering ,Optoelectronics ,0210 nano-technology ,business ,Biosensor - Abstract
The creation of an artificial solid-state ion pump that mimics the delicate ion transport behaviors of a biological protein-based ion pump is drawing more and more research attention due to its potential applications in energy conversion, biosensor, and desalination. However, the reported bioinspired double-gated ion pump systems are generally very primary and can only realize nonselective ion pumping functions with no directionality and uncontrollable ion gating functions, which are far from their biological counterparts. To make the bioinspired device "smart" in a real sense, the implementation of high-level selectivity and directionality in the ion pumping process, while achieving great controllability in the ion gating process, is a necessity. Here, we developed a bioinspired heterogeneous ion pump membrane by combining block copolymer membrane sacrificial coating and plasma grafting technique. The system has unidirectional selective ion pumping and controllable ion gating properties. The introduction of asymmetric ionic group distribution is the key reason for its novel transport behaviors. Such a heterogeneous ion pump could not only provide a basic platform that potentially sparks further efforts to simulate the smart ion transport processes in living bodies but also promote the application of artificial nanofluidic devices in energy conversion, water treatment, and biosensing.
- Published
- 2018
6. Contribution of Nitrogen Vacancies to Ammonia Synthesis over Metal Nitride Catalysts
- Author
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Ye, Tian-Nan, primary, Park, Sang-Won, additional, Lu, Yangfan, additional, Li, Jiang, additional, Sasase, Masato, additional, Kitano, Masaaki, additional, and Hosono, Hideo, additional
- Published
- 2020
- Full Text
- View/download PDF
7. Boosting Gas Involved Reactions at Nanochannel Reactor with Joint Gas–Solid–Liquid Interfaces and Controlled Wettability
- Author
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Fei He, Yafeng Wu, Jiachao Yu, Lijun Yang, Xiaofeng Han, Ye Tian, Anran Liu, Wei Wei, Lei Jiang, Yuanjian Zhang, Li Mi, Ling Jiang, Ying Li, and Songqin Liu
- Subjects
Aqueous solution ,biology ,Chemistry ,Nanotechnology ,02 engineering and technology ,General Chemistry ,Electrolyte ,Adhesion ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Biochemistry ,Catalysis ,0104 chemical sciences ,Colloid and Surface Chemistry ,Membrane ,Chemical engineering ,biology.protein ,Glucose oxidase ,Wetting ,Solubility ,0210 nano-technology ,Porosity - Abstract
The low solubility of gases in aqueous solution is the major kinetic limitation of reactions that involve gases. To address this challenge, we report a nanochannel reactor with joint gas–solid–liquid interfaces and controlled wettability. As a proof of concept, a porous anodic alumina (PAA) nanochannel membrane with different wettability is used for glucose oxidase (GOx) immobilization, which contacts with glucose aqueous solution on one side, while the other side gets in touch with the gas phase directly. Interestingly, it is observed that the O2 could participate in the enzymatic reaction directly from gas phase through the proposed nanochannels, and a hydrophobic interface is more favorable for the enzymatic reaction due to the rearrangement of GOx structure as well as the high gas adhesion. As a result, the catalytic efficiency of GOx in the proposed interface is increased up to 80-fold compared with that of the free state in traditional aqueous air-saturated electrolyte. This triphase interface with ...
- Published
- 2017
8. Supramolecular Self-Assembly Induced Adjustable Multiple Gating States of Nanofluidic Diodes
- Author
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Lei Jiang, Ruochen Fang, Ye Tian, Huanting Wang, Huacheng Zhang, Xi Zhang, and Liulin Yang
- Subjects
Chemistry ,Supramolecular chemistry ,Nanotechnology ,02 engineering and technology ,General Chemistry ,Gating ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Biochemistry ,Catalysis ,0104 chemical sciences ,Colloid and Surface Chemistry ,Monolayer ,Molecule ,Self-assembly ,0210 nano-technology ,Biosensor ,Ion channel ,Diode - Abstract
Artificial nanochannels, inheriting smart gating functions of biological ion channels, promote the development of artificial functional nanofluidic devices for high-performance biosensing and electricity generation. However, gating states of the artificial nanochannels have been mainly realized through chemical modification of the channels with responsive molecules, and their gating states cannot be further regulated once the nanochannel is modified. In this work, we employed a new supramolecular layer-by-layer (LbL) self-assembly method to achieve reversible and adjustable multiple gating features in nanofluidic diodes. Initially, a self-assembly precursor was modified into a single conical nanochannel, then host molecule-cucurbit[8]uril (CB[8]) and guest molecule, a naphthalene derivative, were self-assembled onto the precursor through an LbL method driven by host-enhanced π-π interaction, forming supramolecular monolayer or multilayers on the inner surface of the channel. These self-assemblies with different layer numbers possessed remarkable charge effects and steric effects, exhibiting a capability to regulate the surface charge density and polarity, the effective diameter, and the geometric asymmetry of the single nanochannel, realizing reversible gating of the single nanochannel among multiple rectification and ion-conduction states. As an example of self-assembly of supramolecular networks in nanoconfinements, this work provides a new approach for enhancing functionalities of artificial nanochannels by LbL supramolecular self-assemblies. Meanwhile, since the host molecule, CB[8], used in this work can interact with different kinds of biomolecules and stimuli-responsive chemical species, this work can be further extended to build a novel stable multiple-state research platform for a variety of uses such as sensing and controllable release.
- Published
- 2016
9. Ion/Molecule Transportation in Nanopores and Nanochannels: From Critical Principles to Diverse Functions
- Author
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Zhongpeng Zhu, Dianyu Wang, Lei Jiang, and Ye Tian
- Subjects
Artificial materials ,Chemistry ,Nanotechnology ,General Chemistry ,Energy conversion devices ,Gating ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,0104 chemical sciences ,Ion ,Nanopore ,Colloid and Surface Chemistry ,Rectification ,Molecule - Abstract
Nanopores and nanochannels are ubiquitous, from biological systems to various artificial materials. Taking advantage of size confinement and tailoring the interior components, numerous functions can be achieved such as selectivity, gating, rectification, and so on, which result from diverse interactions between ion/molecule and nanopore/nanochannel. In this Perspective, on account of the summarized critical principles, namely size/shape, wettability, charge, recognition, and other interactions during ion/molecule transportation in nanopores and nanochannels, we introduce four main sections of applications: selective transportation in separation, controllable gating systems, energy conversion devices, and sensors. In addition, some typical challenges and possible future research endeavors in the related fields will also be discussed.
- Published
- 2019
10. Engineered Asymmetric Heterogeneous Membrane: A Concentration-Gradient-Driven Energy Harvesting Device
- Author
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Zhen Zhang, Xiang-Yu Kong, Qian Liu, Liping Wen, Kai Xiao, Ye Tian, Lei Jiang, Pei Li, Ganhua Xie, and Jie Ma
- Subjects
Chemistry ,Ionic bonding ,Nanofluidics ,Nanotechnology ,General Chemistry ,Biochemistry ,Catalysis ,Colloid and Surface Chemistry ,Membrane ,Reversed electrodialysis ,Energy transformation ,Biosensor ,Nanoscopic scale ,Concentration polarization - Abstract
Engineered asymmetric membranes for intelligent molecular and ionic transport control at the nanoscale have gained significant attention and offer prospects for broad application in nanofluidics, energy conversion, and biosensors. Therefore, it is desirable to construct a high-performance heterogeneous membrane capable of coordinating highly selective and rectified ionic transport with a simple, versatile, engineered method to mimic the delicate functionality of biological channels. Here, we demonstrate an engineered asymmetric heterogeneous membrane by combining a porous block copolymer (BCP) membrane, polystyrene-b-poly(4-vinylpyridine) (PS48400-b-P4VP21300), with a track-etched asymmetric porous polyethylene terephthalate membrane. The introduction of chemical, geometrical, and electrostatic heterostructures provides our heterogeneous membrane with excellent anion selectivity and ultrahigh ionic rectification with a ratio of ca. 1075, which is considerably higher than that of existing ionic rectifying systems. This anion-selective heterogeneous membrane was further developed into an energy conversion device to harvest the energy stored in an electrochemical concentration gradient. The concentration polarization phenomenon that commonly exists in traditional reverse electrodialysis can be eliminated with an asymmetric bipolar structure, which considerably increases the output power density. This work presents an important paradigm for the use of versatile BCPs in nanofluidic systems and opens new and promising routes to various breakthroughs in the fields of chemistry, materials science, bioscience, and nanotechnology.
- Published
- 2015
11. High-Resolution Structures and Orientations of Antimicrobial Peptides Piscidin 1 and Piscidin 3 in Fluid Bilayers Reveal Tilting, Kinking, and Bilayer Immersion
- Author
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Christopher V. Grant, Eduard Y. Chekmenev, Ye Tian, B. Scott Perrin, Mukesh Sharma, Myriam Cotten, Stanley J. Opella, Richard M. Venable, Alexander E. Dao, Richard W. Pastor, Robert M. Hayden, William E. Wieczorek, Riqiang Fu, and Caitlin M. Burzynski
- Subjects
Fish Proteins ,Antimicrobial peptides ,Lipid Bilayers ,Molecular Dynamics Simulation ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,Article ,Protein Structure, Secondary ,03 medical and health sciences ,chemistry.chemical_compound ,Molecular dynamics ,Colloid and Surface Chemistry ,Phosphatidylcholine ,Immersion ,Lipid bilayer ,030304 developmental biology ,Phosphatidylglycerol ,Phosphatidylethanolamine ,0303 health sciences ,Bilayer ,Phosphatidylglycerols ,General Chemistry ,0104 chemical sciences ,Liquid Crystals ,Crystallography ,Membrane ,chemistry ,Phosphatidylcholines ,Hydrophobic and Hydrophilic Interactions ,Antimicrobial Cationic Peptides - Abstract
While antimicrobial peptides (AMPs) have been widely investigated as potential therapeutics, high-resolution structures obtained under biologically relevant conditions are lacking. Here, the high-resolution structures of the homologous 22-residue long AMPs piscidin 1 (p1) and piscidin 3 (p3) are determined in fluid-phase 3:1 phosphatidylcholine/phosphatidylglycerol (PC/PG) and 1:1 phosphatidylethanolamine/phosphatidylglycerol (PE/PG) bilayers to identify molecular features important for membrane destabilization in bacterial cell membrane mimics. Structural refinement of (1)H-(15)N dipolar couplings and (15)N chemical shifts measured by oriented sample solid-state NMR and all-atom molecular dynamics (MD) simulations provide structural and orientational information of high precision and accuracy about these interfacially bound α-helical peptides. The tilt of the helical axis, τ, is between 83° and 93° with respect to the bilayer normal for all systems and analysis methods. The average azimuthal rotation, ρ, is 235°, which results in burial of hydrophobic residues in the bilayer. The refined NMR and MD structures reveal a slight kink at G13 that delineates two helical segments characterized by a small difference in their τ angles (10°) and significant difference in their ρ angles (~25°). Remarkably, the kink, at the end of a G(X)4G motif highly conserved among members of the piscidin family, allows p1 and p3 to adopt ρ angles that maximize their hydrophobic moments. Two structural features differentiate the more potent p1 from p3: p1 has a larger ρ angle and less N-terminal fraying. The peptides have comparable depths of insertion in PC/PG, but p3 is 1.2 Å more deeply inserted than p1 in PE/PG. In contrast to the ideal α-helical structures typically assumed in mechanistic models of AMPs, p1 and p3 adopt disrupted α-helical backbones that correct for differences in the amphipathicity of their N- and C-ends, and their centers of mass lie ~1.2-3.6 Å below the plane defined by the C2 atoms of the lipid acyl chains.
- Published
- 2014
12. Hierarchical Self-Assembly of Responsive Organoplatinum(II) Metallacycle-TMV Complexes with Turn-On Fluorescence
- Author
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Peter J. Stang, Ye Tian, Manik Lal Saha, Xuzhou Yan, and Zhongwei Niu
- Subjects
Nanoparticle ,02 engineering and technology ,General Chemistry ,Tetraphenylethylene ,Metallacycle ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,Biochemistry ,Fluorescence ,Catalysis ,Dissociation (chemistry) ,0104 chemical sciences ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,chemistry ,Tobacco mosaic virus ,Self-assembly ,0210 nano-technology ,Organoplatinum - Abstract
Here we report that the rod-like tobacco mosaic virus (TMV), having a negatively charged surface, can be assembled into three-dimensional micrometer-sized bundle-like superstructures via multiple electrostatic interactions with a positively charged molecular "glue", namely, a tetraphenylethylene (TPE)-based discrete organoplatinum(II) metallacycle (TPE-Pt-MC). Due to the nanoconfinement effect in the resultant TMV/TPE-Pt-MC complexes and the aggregation-induced emission (AIE) activity of the TPE units, these hierarchical architectures result in a dramatic fluorescence enhancement that not only provides evidence for the formation of novel metal-organic biohybrid materials but also represents an alternative to turn-on fluorescence. Moreover, the dissociation of these final constructs and subsequent release of individual virus have been achieved by disrupting the TPE-Pt-MC core using tetrabutylammonium bromide (TBAB). This strategy is also compatible with other protein-based nanoparticles such as bacteriophage M13 and ferritin, proving the generality of this approach. Hence, this research will open new routes for the fabrication of functional biohybrid materials involving metal-organic complexes and anisotropically shaped bionanoparticles.
- Published
- 2016
13. Copper-Based Intermetallic Electride Catalyst for Chemoselective Hydrogenation Reactions
- Author
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Ye, Tian-Nan, primary, Lu, Yangfan, additional, Li, Jiang, additional, Nakao, Takuya, additional, Yang, Hongsheng, additional, Tada, Tomofumi, additional, Kitano, Masaaki, additional, and Hosono, Hideo, additional
- Published
- 2017
- Full Text
- View/download PDF
14. The Structure of the Mercury Transporter MerF in Phospholipid Bilayers: A Large Conformational Rearrangement Results from N-Terminal Truncation
- Author
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Stanley J. Opella, Ye Tian, Nemil Vora, George J. Lu, and Francesca M. Marassi
- Subjects
Models, Molecular ,Protein Conformation ,Bilayer ,Lipid Bilayers ,Molecular Sequence Data ,Phospholipid ,General Chemistry ,Biochemistry ,Micelle ,Article ,Catalysis ,Transport protein ,chemistry.chemical_compound ,Transmembrane domain ,Crystallography ,Colloid and Surface Chemistry ,Protein structure ,Bacterial Proteins ,chemistry ,Helix ,Amino Acid Sequence ,Cation Transport Proteins ,Nuclear Magnetic Resonance, Biomolecular ,Peptide sequence ,Phospholipids - Abstract
The three-dimensional structure of the 81-residue mercury transporter MerF determined in liquid crystalline phospholipid bilayers under physiological conditions by Rotationally Aligned (RA) solid-state NMR has two long helices, which extend well beyond the bilayer, with a well-defined interhelical loop. Truncation of the N-terminal 12 residues, which are mobile and unstructured when the protein is solubilized in micelles, results in a large structural rearrangement of the protein in bilayers. In the full-length protein, the N-terminal helix is aligned nearly parallel to the membrane normal and forms an extension of the first transmembrane helix. By contrast, this helix adopts a perpendicular orientation in the truncated protein. The close spatial proximity of the two Cys-containing metal binding sites in the three-dimensional structure of full-length MerF provides insights into possible transport mechanisms. These results demonstrate that major changes in protein structure can result from differences in amino acid sequence (e.g., full-length vs truncated proteins) as well as the use of a non-native membrane mimetic environment (e.g., micelles) vs liquid crystalline phospholipid bilayers. They provide further evidence of the importance of studying unmodified membrane proteins in near-native bilayer environments in order to obtain accurate structures that can be related to their functions.
- Published
- 2013
15. A biomimetic potassium responsive nanochannel: G-quadruplex DNA conformational switching in a synthetic nanopore
- Author
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Xu Hou, Wei Guo, Fan Xia, Fu-Qiang Nie, Hua Dong, Ye Tian, Liping Wen, Lin Wang, Liuxuan Cao, Yang Yang, Jianming Xue, Yanlin Song, Yugang Wang, Dongsheng Liu, and Lei Jiang
- Subjects
Biomimetics -- Research ,DNA -- Structure ,DNA -- Chemical properties ,Potassium -- Chemical properties ,Potassium -- Atomic properties ,Chemistry - Abstract
A novel biomimetic nanochannel system is described having an ion concentration effect that has provided a nonlinear response to potassium ion at the concentration ranging from 0 to 1500 [micro]m. The G-quadruplex DNA is immobilized onto a synthetic nanopore that has undergone a potassium-responsive conformational change and has induced the change in the effective pore size
- Published
- 2009
16. Bioinspired Interfaces with Superwettability: From Materials to Chemistry
- Author
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Ye Tian, Lei Jiang, and Bin Su
- Subjects
Chemistry ,Nanotechnology ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Biochemistry ,Catalysis ,Surface energy ,0104 chemical sciences ,Colloid and Surface Chemistry ,Superhydrophilicity ,Biomimetics ,Microscopy, Electron, Scanning ,Wettability ,Organic liquids ,Wetting ,0210 nano-technology ,Hydrophobic and Hydrophilic Interactions - Abstract
Superwettability is a special case of the wetting phenomenon among liquids, gases, and solids. The superhydrophobic/superhydrophilic effect discovered initially has undergone a century of development based on materials science and biomimetics. With the rapid development of research on anti-wetting materials, superoleophobic/superoleophilic surfaces have been fabricated to repel organic liquids besides water. Further studies of underwater superoleophobic/superoleophilic/superaerophobic/superaerophilic materials provide an alternative way to fabricate anti-wetting surfaces rather than lowering the surface energy. Owing to a series of efforts on the studying of extreme wettabilities, a mature superwettability system gradually evolved and has since become a vibrant area of active research, covering topics of superhydrophobicity/superhydrophilicity, superoleophobicity/superoleophilicity in gas or under liquid, superaerophobicity/superaerophilicity under liquid, and combinations of these states. The kinetic study of the superwettability system includes statics and dynamics, while the studied material structures range from traditional two-dimensional materials to three-dimensional, one-dimensional, and zero-dimensional materials. Furthermore, the wetting liquids range from water to oil, aqueous solutions, and ionic liquids, as well as liquid crystals and other types of liquids. The wetting conditions extend over a wide range of temperatures, pressures, and other external fields. With the development of this series of research, many new theories and functional interfacial materials have been fabricated, including self-cleaning textiles, oil/water separation systems, and water collection systems, and some of these have already been applied in industry. Moreover, the study of superwettability has also introduced many new phenomena and principles to the field of interfacial chemistry that display its vast potential in both materials and chemistry. The present Perspective aims to summarize the most recent research on these materials and their interfacial chemistry. An overview of novel materials in superwettability systems and interfacial materials is presented. Specifically, the evolution of superwettable materials will be introduced, and the fundamental rules for building these superwetting materials will be discussed, followed by a summary of recent progress in the application of superwettable materials to alter the behaviors of chemical reactants and products. Specific emphasis is placed on recent strategies that exploit superwettable materials to influence the performance of traditional chemical reactions and their unique contributions to chemistry, including the effective collection of reaction products, unique growth models of precipitates, and a simple strategy for the alignment/assembly of nanoscale building blocks. Finally, a short perspective is provided on the potential for future developments in the field.
- Published
- 2015
17. Topotactic Transformations of Superstructures: From Thin Films to Two-Dimensional Networks to Nested Two-Dimensional Networks
- Author
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Qian Liu, Ye Tian, Jianming Zhang, Chuan Fei Guo, Shengming Guo, Sihai Cao, and Haoying Tang
- Subjects
Colloid and Surface Chemistry ,Nanolithography ,Nanostructure ,Template ,Chemistry ,Lattice (order) ,Nucleation ,Nanotechnology ,Nanorod ,General Chemistry ,Thin film ,Biochemistry ,Catalysis - Abstract
Design and synthesis of super-nanostructures is one of the key and prominent topics in nanotechnology. Here we propose a novel methodology for synthesizing complex hierarchical superstructures using sacrificial templates composed of ordered two-dimensional (2D) nanostructures through lattice-directed topotactic transformations. The fabricated superstructures are nested 2D orthogonal Bi(2)S(3) networks composed of nanorods. Further investigation indicates that the lattice matching between the product and sacrificial template is the dominant mechanism for the formation of the superstructures, which agrees well with the simulation results based on an anisotropic nucleation and growth analysis. Our approach may provide a promising way toward a lattice-directed nonlithographic nanofabrication technique for making functional porous nanoarchitectures and electronic devices.
- Published
- 2011
18. Highly connected two-dimensional crystals of DNA six-point-stars
- Author
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Yu He, Ye Tian, Ribbe, Alexander E., and Chengde Mao
- Subjects
DNA microarrays -- Research ,Crystals -- Structure ,Crystals -- Research ,Chemistry - Abstract
The design, construction and self-assembly of a DNA six-point-star motif that contains a 6-fold rotational symmetry is reported. This motif has self-assembled into highly connected two-dimensional (2D) periodic arrays and it contains both 6- and 3-fold rotational symmetries and both triangular and hexagonal pores.
- Published
- 2006
19. Antibody nanoarrays with a pitch of 20 nanometers
- Author
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Yu He, Ye Tian, Ribbe, Alexander E., and Chengde Mao
- Subjects
DNA microarrays -- Chemical properties ,Atomic force microscopy -- Usage ,Nucleic acids -- Synthesis ,Nucleic acids -- Research ,Chemistry - Abstract
A study investigates a deoxyribonucleic acid-directed antibody self-assembly into two-dimensional (2D) arrays. The resulting antibody arrays present a well-defined tetragonal order with a repeating distance of ~19 mm.
- Published
- 2006
20. A Biomimetic Potassium Responsive Nanochannel: G-Quadruplex DNA Conformational Switching in a Synthetic Nanopore
- Author
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Lei Jiang, Hua Dong, Liuxuan Cao, Lin Wang, Wei Guo, Ye Tian, Yanlin Song, Fu-Qiang Nie, Liping Wen, Yugang Wang, Xu Hou, Jianming Xue, Dongsheng Liu, Fan Xia, and Yang Yang
- Subjects
Conformational change ,Potassium Channels ,Base Sequence ,Voltage-gated ion channel ,Circular Dichroism ,Potassium ,Concentration effect ,chemistry.chemical_element ,Nanotechnology ,DNA ,General Chemistry ,Hydrogen-Ion Concentration ,G-quadruplex ,Biochemistry ,Catalysis ,Nanostructures ,Ion ,G-Quadruplexes ,Nanopore ,Colloid and Surface Chemistry ,chemistry ,Biomimetic Materials ,Biophysics ,Nucleic Acid Conformation ,Ion channel - Abstract
Potassium is especially crucial in modulating the activity of muscles and nerves whose cells have specialized ion channels for transporting potassium. Normal body function extremely depends on the regulation of potassium concentrations inside the ion channels within a certain range. For life science, undoubtedly, it is significant and challenging to study and imitate these processes happening in living organisms with a convenient artificial system. Here we report a novel biomimetic nanochannel system which has an ion concentration effect that provides a nonlinear response to potassium ion at the concentration ranging from 0 to 1500 microM. This new phenomenon is caused by the G-quadruplex DNA conformational change with a positive correlation with ion concentration. In this work, G-quadruplex DNA was immobilized onto a synthetic nanopore, which undergoes a potassium-responsive conformational change and then induces the change in the effective pore size. The responsive ability of this system can be regulated by the stability of G-quadruplex structure through adjusting potassium concentration. The situation of the grafting G-quadruplex DNA on a single nanopore can closely imitate the in vivo condition because the G-rich telomere overhang is attached to the chromosome. Therefore, this artificial system could promote a potential to conveniently study biomolecule conformational change in confined space by the current measurement, which is significantly different from the nanopore sequencing. Moreover, such a system may also potentially spark further experimental and theoretical efforts to simulate the process of ion transport in living organisms and can be further generalized to other more complicated functional molecules for the exploitation of novel bioinspired intelligent nanopore machines.
- Published
- 2009
21. Bioinspired artificial single ion pump
- Author
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Dadong Yan, Xu Hou, Lei Jiang, Fu Yang, Lu Zeng, Lin Li, Huacheng Zhang, and Ye Tian
- Subjects
Nanotubes ,Chemistry ,Nanofluidics ,Nanotechnology ,Membranes, Artificial ,General Chemistry ,Biosensing Techniques ,Calcium-Transporting ATPases ,Ion Pumps ,Hydrogen-Ion Concentration ,Biochemistry ,Catalysis ,Ion ,Nanostructures ,Polymerization ,Colloid and Surface Chemistry ,Passive Ion Transport ,Ion pump ,Energy transformation ,Polyethylenes ,Sodium-Potassium-Exchanging ATPase ,Biosensor ,Ion transporter ,Ion channel - Abstract
Bioinspired artificial functional nanochannels for intelligent molecular and ionic transport control at the nanoscale have wide potential applications in nanofluidics, energy conversion, and biosensors. Although various smart passive ion transport properties of ion channels have been artificially realized, it is still hugely challenging to achieve high level intelligent ion transport features in biological ion pumps. Here we show a unique bioinspired single ion pump based on a cooperative pH response double-gate nanochannel, whose gates could be opened and closed alternately/simultaneously under symmetric/asymmetric pH environments. With the stimulation of the double-gate nanochannel by continuous switching of the symmetric/asymmetric pH stimuli, the bioinspired system systematically realized three key ionic transport features of biological ion pumps, including an alternating gates ion pumping process under symmetric pH stimuli, transformation of the ion pump into an ion channel under asymmetric pH stimuli, and a fail-safe ion pumping feature under both symmetric and asymmetric pH stimuli. The ion pumping processes could well be reproduced under a concentration gradient. With the advantages of the extraordinary ionic transport functions of biological ion pumps, the bioinspired ion pump should find widespread applicability in active transportation-controlling smart nanofluidic devices, efficient energy conversions, and seawater desalinization, and open the way to design and develop novel bioinspired intelligent artificial nanochannel materials.
- Published
- 2013
22. Bioinspired Heterogeneous Ion Pump Membranes: Unidirectional Selective Pumping and Controllable Gating Properties Stemming from Asymmetric Ionic Group Distribution.
- Author
-
Zhen Zhang, Pei Li, Xiang-Yu Kong, Ganhua Xie, Yongchao Qian, Ziqi Wang, Ye Tian, Liping Wen, and Lei Jiang
- Published
- 2018
- Full Text
- View/download PDF
23. Hierarchical Self-Assembly of Responsive Organoplatinum(II) Metallacycle-TMV Complexes with Turn-On Fluorescence.
- Author
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Ye Tian, Zhongwei Niu, Xuzhou Yan, Saha, Manik Lal, and Stang, Peter J.
- Subjects
- *
ORGANOPLATINUM compounds , *METALLACYCLES , *FLUORESCENCE , *TOBACCO mosaic virus , *ELECTROSTATIC interaction - Abstract
Here we report that the rod-like tobacco mosaic virus (TMV), having a negatively charged surface, can be assembled into three-dimensional micrometer-sized bundle-like superstructures via multiple electrostatic interactions with a positively charged molecular "glue", namely, a tetraphenylethylene (TPE)-based discrete organoplatinum(II) metallacycle (TPE-Pt-MC). Due to the nanoconfinement effect in the resultant TMV/TPE-Pt-MC complexes and the aggregation-induced emission (AIE) activity of the TPE units, these hierarchical architectures result in a dramatic fluorescence enhancement that not only provides evidence for the formation of novel metal-organic biohybrid materials but also represents an alternative to turn-on fluorescence. Moreover, the dissociation of these final constructs and subsequent release of individual virus have been achieved by disrupting the TPE-Pt-MC core using tetrabutylammonium bromide (TBAB). This strategy is also compatible with other protein-based nanoparticles such as bacteriophage M13 and ferritin, proving the generality of this approach. Hence, this research will open new routes for the fabrication of functional biohybrid materials involving metal-organic complexes and anisotropically shaped bionanoparticles. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
24. Molecular gears: A pair of DNA circles continuously rolls against each other
- Author
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Ye Tian and Chengde Mao
- Subjects
Molecular dynamics -- Research ,DNA -- Research ,Chemistry - Abstract
A molecular gear system is constructed and demonstrated that the gears could continuously roll against each other. Complicated nanomachines contain multiple simple motors that can efficiently communicate with each other and cooperatively work together.
- Published
- 2004
25. Chemical formation of mononuclear univalent zinc in microporous crystalline silicoaluminophosphate
- Author
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Ye Tian, Guo-Dong Li, and Jie-Sheng Chen
- Subjects
Chemical reactions -- Research ,Zinc compounds -- Chemical properties ,Chemistry - Abstract
A silicoaluminophosphate with a chabazite (CHA) structure is chosen as a microspace provider to interact with metallic zinc for the chemical formation of mononuclear univalent zinc. This formation through chemical reaction with protons represents a new approach that opens vast vistas for the preparation of interesting paramagnetic compounds with univalent metal species.
- Published
- 2003
26. Antibody nanoarrays with a pitch of approximately 20 nanometers
- Author
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Yu, He, Ye, Tian, Alexander E, Ribbe, and Chengde, Mao
- Subjects
Antigen-Antibody Reactions ,Epitopes ,Immunoglobulin G ,Electrophoresis, Polyacrylamide Gel ,DNA ,Antigens ,Microscopy, Atomic Force ,Antibodies ,Nanostructures - Abstract
We have developed a strategy for preparing antibody nanoarrays by DNA templating. In the resulting tetragonal antibody arrays, each spot is a similarly orientated, individual antibody molecule (IgG). The separation between two adjacent IgG molecules is only approximately 20 nm.
- Published
- 2006
27. Supramolecular Self-Assembly Induced Adjustable Multiple Gating States of Nanofluidic Diodes.
- Author
-
Ruochen Fang, Huacheng Zhang, Liulin Yang, Huanting Wang, Ye Tian, Xi Zhang, and Lei Jiang
- Published
- 2016
- Full Text
- View/download PDF
28. Hierarchical Self-Assembly of Responsive Organoplatinum (II) Metallacycle -TMV Complexes with Turn -On Fluorescence.
- Author
-
Ye Tian, Xuzhou Yan, Saha, Manik Lai, Zhongwei Niu, and Stang, Peter J.
- Subjects
- *
ORGANOPLATINUM compounds , *METAL complexes , *MOLECULAR self-assembly , *TOBACCO mosaic virus , *BACTERIOPHAGES , *NANOPARTICLES - Abstract
Here we report that the rod-like tobacco mosaic virus (TMV), having a negatively charged surface, can be assembled into three-dimensional micrometer-sized bundle-like superstructures via multiple electrostatic interactions with a positively charged molecular "glue", namely, a tetraphenylethylene (TPE)-based discrete organoplatinum(Il) metallacycle (TPE-Pt-MC). Due to the nanoconfinement effect in the resultant TMV/TPEPt- MC complexes and the aggregation-induced emission (AIE) activity of the TPE units, these hierarchical architectures result in a dramatic fluorescence enhancement that not only provides evidence for the formation of novel metal-organic biohybrid materials but also represents an alternative to turn-on fluorescence. Moreover, the dissociation of these final constructs and subsequent release of individual virus have been achieved by disrupting the TPE-Pt-MC core using tetrabutylammonium bromide (TBAB). This strategy is also compatible with other protein-based nanoparticles such as bacteriophage Ml 3 and ferritin, proving the generality of this approach. Hence, this research will open new routes for the fabrication of functional biohybrid materials involving metal--organic complexes and anisotropically shaped bionanoparticles. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
29. Molecular gears: a pair of DNA circles continuously rolls against each other
- Author
-
Chengde Mao and Ye Tian
- Subjects
Chemistry ,Molecular Motor Proteins ,DNA, Single-Stranded ,Nanotechnology ,Geometry ,General Chemistry ,behavioral disciplines and activities ,Biochemistry ,Catalysis ,stomatognathic diseases ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,stomatognathic system ,A-DNA ,DNA, Circular ,human activities ,health care economics and organizations ,DNA - Abstract
A pair of DNA nanocircles has been constructed to model gears. The nanogears can move against each other continuously. Each gear consists of a DNA duplex circle and three single-stranded teeth. The teeth on the two gears are brought together by linker strands, which are complementary to the gear teeth. The teeth are separated from each other by removal of the linker strands with a strand displacement mechanism.
- Published
- 2004
30. Highly Connected Two-Dimensional Crystals of DNA Six-Point-Stars
- Author
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Chengde Mao, Yu He, and Alexander E. Ribbe, and Ye Tian
- Subjects
Hexagonal crystal system ,Chemistry ,DNA ,General Chemistry ,Crystal structure ,Microscopy, Atomic Force ,Biochemistry ,Catalysis ,Stars ,Crystallography ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Point (geometry) ,Crystallization - Abstract
This paper reports a novel DNA six-point-star motif assembled from only three different DNA single-strands. This motif readily assembles into hexagonal two-dimensional arrays with high connectivity. Such a high connectivity could potentially improve the array stability.
- Published
- 2006
31. Bioinspired Interfaces with Superwettability: From Materials to Chemistry.
- Author
-
Bin Su, Ye Tian, and Lei Jiang
- Subjects
- *
SUPERHYDROPHOBIC surfaces , *WETTING , *HYDROPHILIC compounds , *TEMPERATURE effect , *SURFACE energy , *BIOMIMETIC chemicals - Abstract
Superwettability is a special case of the wetting phenomenon among liquids, gases, and solids. The superhydrophobic/superhydrophilic effect discovered initially has undergone a century of development based on materials science and biomimetics. With the rapid development of research on anti-wetting materials, superoleophobic/superoleophilic surfaces have been fabricated to repel organic liquids besides water. Further studies of underwater superoleophobic/superoleophilic/superaerophobic/superaerophilic materials provide an alternative way to fabricate anti-wetting surfaces rather than lowering the surface energy. Owing to a series of efforts on the studying of extreme wettabilities, a mature superwettability system gradually evolved and has since become a vibrant area of active research, covering topics of superhydrophobicity/superhydrophilicity, superoleophobicity/superoleophilicity in gas or under liquid, superaerophobicity/superaerophilicity under liquid, and combinations of these states. The kinetic study of the superwettability system includes statics and dynamics, while the studied material structures range from traditional two-dimensional materials to three-dimensional, one-dimensional, and zero-dimensional materials. Furthermore, the wetting liquids range from water to oil, aqueous solutions, and ionic liquids, as well as liquid crystals and other types of liquids. The wetting conditions extend over a wide range of temperatures, pressures, and other external fields. With the development of this series of research, many new theories and functional interfacial materials have been fabricated, including self-cleaning textiles, oil/water separation systems, and water collection systems, and some of these have already been applied in industry. Moreover, the study of superwettability has also introduced many new phenomena and principles to the field of interfacial chemistry that display its vast potential in both materials and chemistry. The present Perspective aims to summarize the most recent research on these materials and their interfacial chemistry. An overview of novel materials in superwettability systems and interfacial materials is presented. Specifically, the evolution of superwettable materials will be introduced, and the fundamental rules for building these superwetting materials will be discussed, followed by a summary of recent progress in the application of superwettable materials to alter the behaviors of chemical reactants and products. Specific emphasis is placed on recent strategies that exploit superwettable materials to influence the performance of traditional chemical reactions and their unique contributions to chemistry, including the effective collection of reaction products, unique growth models of precipitates, and a simple strategy for the alignment/assembly of nanoscale building blocks. Finally, a short perspective is provided on the potential for future developments in the field. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
32. Chemical Formation of Mononuclear Univalent Zinc in a Microporous Crystalline Silicoaluminophosphate
- Author
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Jie-Sheng Chen, Ye Tian, and Guo-Dong Li
- Subjects
Chemistry ,Inorganic chemistry ,chemistry.chemical_element ,General Medicine ,Microporous material ,General Chemistry ,Zinc ,Molecular sieve ,Biochemistry ,Magnetic susceptibility ,Catalysis ,law.invention ,Metal ,Crystallography ,Paramagnetism ,Colloid and Surface Chemistry ,Transition metal ,law ,visual_art ,visual_art.visual_art_medium ,Diamagnetism ,Antiferromagnetism ,Electron paramagnetic resonance - Abstract
A host-guest compound containing mononuclear univalent Zn+ ions has been prepared through vapor reaction of metallic zinc with protons in the cages of SAPO-CHA, a silicoaluminophosphate molecular sieve. Unlike in fused ZnCl2 salt, the formed Zn+ species are associated with the molecular sieve walls, and this prevents the cations from getting paired to form diamagnetic (Zn-Zn)2+. Electron spin resonance spectroscopy reveals the paramagnetic nature of the Zn+ species which display anisotropic g factors, and the two crystallographically independent Zn+ sites are distinguishable from the ESR signals. The magnetic moments of the univalent zinc in SAPO-CHA interact antiferromagnetically at low temperatures with a Néel point of about 4 K as observed from the temperature dependence plot of the magnetic susceptibility of the host-guest compound.
- Published
- 2003
33. High-Resolution Structures and Orientations of Antimicrobial Peptides Piscidin 1 and Piscidin 3 in Fluid Bilayers Reveal Tilting, Kinking, and Bilayer Immersion.
- Author
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Perrin Jr., B. Scott, Ye Tian, Riqiang Fu, Grant, Christopher V., Chekmenev, Eduard Y., Wieczorek, William E., Dao, Alexander E., Hayden, Robert M., Burzynskiv, Caitlin M., Venable, Richard M., Sharma, Mukesh, Opella, Stanley J., Pastor, Richard W., and Cotten, Myriam L.
- Subjects
- *
ANTIMICROBIAL peptides , *BILAYERS (Solid state physics) , *LECITHIN , *PHOSPHATIDYLGLYCEROL , *PHOSPHATIDYLETHANOLAMINES , *BACTERIAL cell membranes , *SOLID state chemistry , *NUCLEAR magnetic resonance - Abstract
While antimicrobial peptides (AMPs) have been widely investigated as potential therapeutics, high-resolution structures obtained under biologically relevant conditions are lacking. Here, the high-resolution structures of the homologous 22-residue long AMPs piscidin 1 (p1) and piscidin 3 (p3) are determined in fluid-phase 3:1 phosphatidylcholine/phosphatidylglycerol (PC/PG) and 1:1 phosphatidylethanolamine/phosphatidylglycerol (PE/PG) bilayers to identify molecular features important for membrane destabilization in bacterial cell membrane mimics. Structural refinement of 1H-15N dipolar couplings and 15N chemical shifts measured by oriented sample solid-state NMR and all-atom molecular dynamics (MD) simulations provide structural and orientational information of high precision and accuracy about these interfacially bound a-helical peptides. The tilt of the helical axis, Τ, is between 83° and 93° with respect to the bilayer normal for all systems and analysis methods. The average azimuthal rotation, ρ, is 235°, which results in burial of hydrophobic residues in the bilayer. The refined NMR and MD structures reveal a slight kink at G13 that delineates two helical segments characterized by a small difference in their Τ angles (<10°) and significant difference in their ρ angles (~25°). Remarkably, the kink, at the end of a G(X)4G motif highly conserved among members of the piscidin family, allows p1 and p3 to adopt ρ angles that maximize their hydrophobic moments. Two structural features differentiate the more potent p1 from p3: p1 has a larger ρ angle and less N-terminal fraying. The peptides have comparable depths of insertion in PC/PG, but p3 is 1.2 Å more deeply inserted than p1 in PE/PG. In contrast to the ideal a-helical structures typically assumed in mechanistic models of AMPs, p1 and p3 adopt disrupted a-helical backbones that correct for differences in the amphipathicity of their N- and C-ends, and their centers of mass lie ~1.2-3.6 Å below the plane defined by the C2 atoms of the lipid acyl chains. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
34. Bioinspired Artificial Single Ion Pump.
- Author
-
Huacheng Zhang, Xu Hou, Lu Zeng, Fu Yang, Lin Li, Dadong Yan, Ye Tian, and Lei Jiang
- Published
- 2013
- Full Text
- View/download PDF
35. The Structure of the Mercury Transporter MerF in Phospholipid Bilayers: A Large Conformational Rearrangement Results from N-Terminal Truncation.
- Author
-
Lu, George J., Ye Tian, Vora, Nemil, Marassi, Francesca M., and Opella, Stanley J.
- Subjects
- *
MERCURY , *BILAYER lipid membranes , *LIQUID crystals , *MICELLES , *BINDING sites , *MEMBRANE proteins , *AMINO acids - Abstract
The three-dimensional structure of the 81-residue mercury transporter MerF determined in liquid crystalline phospholipid bilayers under physiological conditions by Rotationally Aligned (RA) solid-state NMR has two long helices, which extend well beyond the bilayer, with a well-defined interhelical loop. Truncation of the N-terminal 12 residues, which are mobile and unstructured when the protein is solubilized in micelles, results in a large structural rearrangement of the protein in bilayers. In the full-length protein, the N-terminal helix is aligned nearly parallel to the membrane normal and forms an extension of the first transmembrane helix. By contrast, this helix adopts a perpendicular orientation in the truncated protein. The close spatial proximity of the two Cys-containing metal binding sites in the three-dimensional structure of full-length MerF provides insights into possible transport mechanisms. These results demonstrate that major changes in protein structure can result from differences in amino acid sequence (e.g., full-length vs truncated proteins) as well as the use of a non-native membrane mimetic environment (e.g., micelles) vs liquid crystalline phospholipid bilayers. They provide further evidence of the importance of studying unmodified membrane proteins in near-native bilayer environments in order to obtain accurate structures that can be related to their functions. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
36. Structure Determination of a Membrane Protein in Proteoliposomes.
- Author
-
Das, Bibhuti B., Nothnagel, Henry J., Lu, George J., Woo Sung Son, Ye Tian, Marassi, Francesca M., and Opella, Stanley J.
- Published
- 2012
- Full Text
- View/download PDF
37. Topotactic Transformations of Superstructures: From Thin Films to Two-Dimensional Networks to Nested Two-Dimensional Networks.
- Author
-
Chuan Fei Guo, Sihai Cao, Jianming Zhang, Haoying Tang, Shengming Guo, Ye Tian, and Qian Liu
- Published
- 2011
- Full Text
- View/download PDF
38. Antibody Nanoarrays with a Pitch of ∼20 Nanometers.
- Author
-
Yu He, Ye Tian, Ribbe, Alexander E., and Chengde Mao
- Subjects
- *
DNA antibodies , *IMMUNOGLOBULIN G , *DNA , *MOLECULES , *NUCLEIC acids - Abstract
The article presents information on a study which uses antigen-modified DNA arrays as templates to direct antibodies to assemble into very high density nanoarrays. The study has four features, that is, each spot of the nanoarrays has only one single IgG molecule, the repeating distance of these 2D arrays is ∼ 19 nm, all antibody molecules in the arrays have similar orientations and the antibody arrays are assembled in solution instead of on solid substrates.
- Published
- 2006
- Full Text
- View/download PDF
39. Chemical Formation of Mononuclear Univalent Zinc in a Microporous Crystalline Silicoaluminophosphate.
- Author
-
Ye Tian, Guo-Dong Li, and Jie-Sheng Chen
- Subjects
- *
ZINC , *MOLECULAR sieves , *CATIONS - Abstract
Examines the effectiveness of the chemical preparation of compounds containing mononuclear univalent zinc (Zn) by choosing a silicoaluminophosphate with a chabazite (CHA) structure as the microspace provider to interact with metallic Zn. Structure of the molecular sieve designated as SAPO-CHA; Schematic representation of the formation of two Zn cations in one CHA cage of SAPO-CHA.
- Published
- 2003
- Full Text
- View/download PDF
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