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Your search keyword '"Lin, Chun‐Hao"' showing total 41 results
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41 results on '"Lin, Chun‐Hao"'

5. Liaw's Ellipse Anteversion Method for Distinguishing Acetabular Component Retroversion from Anteversion on Plain Radiographs.

Author

Lin, Chun‐Hao, Chen, Wei‐Cheng, Weng, Pei‐Wei, Huang, Yu‐min, and Liaw, Chen‐Kun

Subjects
*TOTAL hip replacement, *PREOPERATIVE risk factors, *RADIOGRAPHS, *COMPUTED tomography, ACETABULUM surgery
Abstract

Improper acetabulum component position is a significant risk factor for postoperative dislocation after total hip arthroplasty. Several radiographic two‐dimensional methods exist for measuring acetabulum component anteversion, but they cannot distinguish between anteversion and retroversion. "Liaw's version," initially proposed as a simple mathematical standardized two‐dimensional method, was modified to the computerized ellipse method, proving superior accuracy to traditional two‐dimensional methods. In this article, we demonstrated its application in detecting and measuring retroverted acetabulum component. We obtained anteroposterior pelvis radiographs from a patient undergoing total hip arthroplasty on the day of surgery and 2 weeks postoperatively. The computerized ellipse method was used to measure the acetabulum component orientation. Upon comparison, the difference between θ assigned to be retroverted (9.52–8.56 = 0.96) is much smaller than the difference between θ assigned to be anteverted (23.81–18.86 = 4.95), leading us to determine retroversion. This was further confirmed by computed tomography at the 6‐week follow‐up. We propose that using the computerized ellipse method to measure Liaw's version can be a valuable tool in identifying acetabulum component retroversion on anteroposterior radiographs during routine postoperative follow‐up and retrospective assessments of total hip arthroplasty patients. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Enabling Tailorable Optical Properties and Markedly Enhanced Stability of Perovskite Quantum Dots by Permanently Ligating with Polymer Hairs

Author

Yoon, Young Jun, primary, Chang, Yajing, additional, Zhang, Shuguang, additional, Zhang, Meng, additional, Pan, Shuang, additional, He, Yanjie, additional, Lin, Chun Hao, additional, Yu, Shengtao, additional, Chen, Yihuang, additional, Wang, Zewei, additional, Ding, Yong, additional, Jung, Jaehan, additional, Thadhani, Naresh, additional, Tsukruk, Vladimir V., additional, Kang, Zhitao, additional, and Lin, Zhiqun, additional

Published
2019
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14. All-Inorganic Perovskite Nanocrystals with a Stellar Set of Stabilities and Their Use in White Light-Emitting Diodes

Author

Chang, Yajing, primary, Yoon, Young Jun, additional, Li, Guopeng, additional, Xu, Enze, additional, Yu, Shengtao, additional, Lu, Cheng-Hsin, additional, Wang, Zewei, additional, He, Yanjie, additional, Lin, Chun Hao, additional, Wagner, Brent K., additional, Tsukruk, Vladimir V., additional, Kang, Zhitao, additional, Thadhani, Naresh, additional, Jiang, Yang, additional, and Lin, Zhiqun, additional

Published
2018
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15. Control of Whispering Gallery Modes and PT-Symmetry Breaking in Colloidal Quantum Dot Microdisk Lasers with Engineered Notches

Author

Zeng, Qingji, Lafalce, Evan, Lin, Chun Hao, Smith, Marcus J., Jung, Jaehan, Yoon, Young, Lin, Zhiqun, Tsukruk, Vladimir V., and Vardeny, Z. Valy

Abstract

Whispering gallery mode resonators have been demonstrated to be a great way to achieve superior optical cavities with high quality factor and small mode volume. However, due to the high sensitivity of these modes to the properties of the resonator boundary, they are susceptible to parasitic splitting of clockwise and counterclockwise modes. In this work, we investigate the effect of implantation of an engineered notch into the boundary of a circular microdisk resonator fabricated from colloidal quantum dots, which are particularly sensitive to boundary defects. We observed a strong reduction of parasitic mode splitting with introduction of a large engineered notch, as well as enhanced directionality of laser emission. We further investigate the performance of these resonators in evanescently coupled pairs, where the modal interaction allows modulation of laser behavior through variation of the gain and loss induced by the optical pump. We show that two distinct cases of modal interaction can be achieved by adjusting the size of the engineered notch, providing a bridge between intra- and interdisk modal interactions for laser spectral control.

Published
2024
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16. Spirally Configured (cis-Stilbene) Trimers: Steady-State and Time-Resolved Photophysical Studies and Organic Light-Emitting Diode Applications

Author

Hung, Shiang-Fu, primary, Fang, Po-Hsun, additional, Wei, Yi, additional, Tsai, Fang-Yuan, additional, Chen, Chien-Tien, additional, Kimura, Takumi, additional, Samori, Shingo, additional, Fujitsuka, Mamoru, additional, Majima, Tetsuro, additional, Lin, Chun-Hao, additional, Peng, Shiang-Hau, additional, and Jou, Jwo-Huei, additional

Published
2018
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18. Large‐Area Lasing and Multicolor Perovskite Quantum Dot Patterns

Author

Lin, Chun Hao, primary, Zeng, Qingji, additional, Lafalce, Evan, additional, Yu, Shengtao, additional, Smith, Marcus J., additional, Yoon, Young Jun, additional, Chang, Yajing, additional, Jiang, Yang, additional, Lin, Zhiqun, additional, Vardeny, Zeev Valy, additional, and Tsukruk, Vladimir V., additional

Published
2018
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22. Robust, Uniform, and Highly Emissive Quantum Dot–Polymer Films and Patterns Using Thiol–Ene Chemistry

Author

Smith, Marcus J., primary, Malak, Sidney T., additional, Jung, Jaehan, additional, Yoon, Young Jun, additional, Lin, Chun Hao, additional, Kim, Sunghan, additional, Lee, Kyung Min, additional, Ma, Ruilong, additional, White, Timothy J., additional, Bunning, Timothy J., additional, Lin, Zhiqun, additional, and Tsukruk, Vladimir V., additional

Published
2017
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37. Size-Tuned ZnO Nanocrucible Arrays for Magnetic Nanodot Synthesis viaAtomic Layer Deposition-Assisted Block Polymer Lithography

Author

Lin, Chun-Hao, Polisetty, Srinivas, O’Brien, Liam, Baruth, Andrew, Hillmyer, Marc A., Leighton, Chris, and Gladfelter, Wayne L.

Abstract

Low-temperature atomic layer deposition of conformal ZnO on a self-assembled block polymer lithographic template comprising well-ordered, vertically aligned cylindrical pores within a poly(styrene) (PS) matrix was used to produce nanocrucible templates with pore diameters tunable viaZnO thickness. Starting from a PS template with a hexagonal array of 30 nm diameter pores on a 45 nm pitch, the ZnO thickness was progressively increased to narrow the pore diameter to as low as 14 nm. Upon removal of the PS by heat treatment in air at 500 °C to form an array of size-tunable ZnO nanocrucibles, permalloy (Ni80Fe20) was evaporated at normal incidence, filling the pores and creating an overlayer. Argon ion beam milling was then used to etch back the overlayer (a Damascene-type process), leaving a well-ordered array of isolated ZnO nanocrucibles filled with permalloy nanodots. Microscopy and temperature-dependent magnetometry verified the diameter reduction with increasing ZnO thickness. The largest diameter (30 nm) dots exhibit a ferromagnetic multidomain/vortex state at 300 K, with relatively weakly temperature-dependent coercivity. Reducing the diameter leads to a crossover to a single-domain state and eventually superparamagnetism at sufficiently high temperature, in quantitative agreement with expectations. We argue that this approach could render this form of block polymer lithography compatible with high-temperature processing (as required for technologically important high perpendicular anisotropy ordered alloys, for instance), in addition to enabling separation-dependent studies to probe interdot magnetostatic interactions.

Published
2015
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38. Optimization of Long-Range Order in Solvent Vapor Annealed Poly(styrene)-block-poly(lactide) Thin Films for Nanolithography

Author

Baruth, A., Seo, Myungeun, Lin, Chun Hao, Walster, Kern, Shankar, Arjun, Hillmyer, Marc A., and Leighton, C.

Abstract

Detailed experiments designed to optimize and understand the solvent vapor annealing of cylinder-forming poly(styrene)-block-poly(lactide) thin films for nanolithographic applications are reported. By combining climate-controlled solvent vapor annealing (including in situ probes of solvent concentration) with comparative small-angle X-ray scattering studies of solvent-swollen bulk polymers of identical composition, it is concluded that a narrow window of optimal solvent concentration occurs just on the ordered side of the order–disorder transition. In this window, the lateral correlation length of the hexagonally close-packed ordering, the defect density, and the cylinder orientation are simultaneously optimized, resulting in single-crystal-like ordering over 10 μm scales. The influences of polymer synthesis method, composition, molar mass, solvent vapor pressure, evaporation rate, and film thickness have all been assessed, confirming the generality of this behavior. Analogies to thermal annealing of elemental solids, in combination with an understanding of the effects of process parameters on annealing conditions, enable qualitative understanding of many of the key results and underscore the likely generality of the main conclusions. Pattern transfer via a Damascene-type approach verified the applicability for high-fidelity nanolithography, yielding large-area metal nanodot arrays with center-to-center spacing of 38 nm (diameter 19 nm). Finally, the predictive power of our findings was demonstrated by using small-angle X-ray scattering to predict optimal solvent annealing conditions for poly(styrene)-block-poly(lactide) films of low molar mass (18 kg mol–1). High-quality templates with cylinder center-to-center spacing of only 18 nm (diameter of 10 nm) were obtained. These comprehensive results have clear and important implications for optimization of pattern transfer templates and significantly advance the understanding of self-assembly in block copolymer thin films.

Published
2014
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39. Composite Structures with Emissive Quantum Dots for Light Enhancement.

Author

Smith, Marcus J., Lin, Chun Hao, Yu, Shengtao, and Tsukruk, Vladimir V.

Subjects
*COMPOSITE structures, *QUANTUM dots, *SURFACE chemistry, *PHASE separation, *OPTICAL elements, *CLUSTERING of particles, *OPTOELECTRONIC devices
Abstract

Since their inception, quantum dots have proven to be advantageous for light management applications due to their high brightness and well‐controlled absorption, scattering, and emission properties. As quantum dots become commercially available at large scale, the need for robust, stable, and flexible optical components continues to drive the development of robust and flexible quantum dot composite materials. In this review, after a thorough introduction to quantum dots, discussion delves into methods for fabricating quantum dot loaded composite optical elements such as thin films, microfabricated patterns, and microstructures. The importance of surface chemistry and ligand engineering, host matrixes, wet processing, and unique patterning methodologies is presented by considering photostability, aggregation, and phase separation of quantum dots in corresponding composites. With regard to prospective optical applications of quantum dot materials, emphasis is placed on light emitting and guiding composite materials for lasing applications, specifically whispering gallery mode‐based photonic microsystems. These developments will enable novel flexible, portable, and miniaturized optoelectronic devices such as light‐emitting diodes, flexible pixelated displays, solar cells, large‐area microwaveguides, omnidirectional micromirrors, optical metasurfaces, and directional microlasers. Herein the state of the art of quantum dot composite materials is described, with particular interest paid to light emitting and guiding technologies. Great attention is paid to micropatterning, focusing on the importance of surface chemistry and ligand engineering, host matrixes, and wet processing to achieve optimal photostability, aggregation, and phase separation of quantum dots in corresponding patterns and resulting devices. [ABSTRACT FROM AUTHOR]

Published
2019
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40. Toddler's Fracture.

Author

Lin CH and Lin YC

Subjects
Humans, Infant, Tibial Fractures diagnostic imaging, Tibial Fractures etiology, Tibial Fractures therapy
Published
2023
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41. Crafting Core/Graded Shell-Shell Quantum Dots with Suppressed Re-absorption and Tunable Stokes Shift as High Optical Gain Materials.

Author

Jung J, Lin CH, Yoon YJ, Malak ST, Zhai Y, Thomas EL, Vardeny V, Tsukruk VV, and Lin Z

Abstract

The key to utilizing quantum dots (QDs) as lasing media is to effectively reduce non-radiative processes, such as Auger recombination and surface trapping. A robust strategy to craft a set of CdSe/Cd(1-x)Zn(x)Se(1-y)S(y)/ZnS core/graded shell-shell QDs with suppressed re-absorption, reduced Auger recombination rate, and tunable Stokes shift is presented. In sharp contrast to conventional CdSe/ZnS QDs, which have a large energy level mismatch between CdSe and ZnS and thus show strong re-absorption and a constrained Stokes shift, the as-synthesized CdSe/Cd(1-x)Zn(x)Se(1-y)S(y)/ZnS QDs exhibited the suppressed re-absorption of CdSe core and tunable Stokes shift as a direct consequence of the delocalization of the electron wavefunction over the entire QD. Such Stokes shift-engineered QDs with suppressed re-absorption may represent an important class of building blocks for use in lasers, light emitting diodes, solar concentrators, and parity-time symmetry materials and devices., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2016
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