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2,104 results on '"Lee, Chun Sing"'

1. 1T′-transition metal dichalcogenide monolayers stabilized on 4H-Au nanowires for ultrasensitive SERS detection

Author

Li, Zijian, Zhai, Li, Zhang, Qinghua, Zhai, Wei, Li, Pai, Chen, Bo, Chen, Changsheng, Yao, Yao, Ge, Yiyao, Yang, Hua, Qiao, Panzhe, Kang, Jianing, Shi, Zhenyu, Zhang, An, Wang, Hongyi, Liang, Jinzhe, Liu, Jiawei, Guan, Zhiqiang, Liao, Lingwen, Neacșu, Vlad Andrei, Ma, Chen, Chen, Ye, Zhu, Ye, Lee, Chun-Sing, Ma, Lu, Du, Yonghua, Gu, Lin, Li, Jian-Feng, Tian, Zhong-Qun, Ding, Feng, and Zhang, Hua

Published
2024
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11. Phase-dependent growth of Pt on MoS2 for highly efficient H2 evolution

Author

Shi, Zhenyu, Zhang, Xiao, Lin, Xiaoqian, Liu, Guigao, Ling, Chongyi, Xi, Shibo, Chen, Bo, Ge, Yiyao, Tan, Chaoliang, Lai, Zhuangchai, Huang, Zhiqi, Ruan, Xinyang, Zhai, Li, Li, Lujiang, Li, Zijian, Wang, Xixi, Nam, Gwang-Hyeon, Liu, Jiawei, He, Qiyuan, Guan, Zhiqiang, Wang, Jinlan, Lee, Chun-Sing, Kucernak, Anthony R. J., and Zhang, Hua

Published
2023
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15. Direct evidence of void induced structural relaxations in colloidal glass formers

Author

Yip, Cho-Tung, Isobe, Masaharu, Chan, Chor-Hoi, Ren, Simiao, Wong, Kin-Ping, Huo, Qingxiao, Lee, Chun-Sing, Tsang, Yuen-Hong, Han, Yilong, and Lam, Chi-Hang

Subjects
Condensed Matter - Soft Condensed Matter, Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Materials Science
Abstract

Particle dynamics in supercooled liquids are often dominated by string-like motions in which lines of particles perform activated hops cooperatively. The structural features triggering these motions, crucial in understanding glassy dynamics, remain highly controversial. We experimentally study microscopic particle dynamics in colloidal glass formers at high packing fractions. With a small polydispersity leading to glass-crystal coexistence, a void in the form of a vacancy in the crystal can diffuse reversibly into the glass and further induces string-like motions. In the glass, a void takes the form of a quasi-void consisting of a few neighboring free volumes and is transported by the string-like motions it induces. In fully glassy systems with a large polydispersity, similar quasi-void actions are observed. The mobile particles cluster into string-like or compact geometries, but the compact ones can further be broken down into connected sequences of strings, establishing their general importance., Comment: main text 5 pages 4 figures + supplymentary material 24 pages 23 figures (Ancillary files), 2020 Nov accepted by Physical Review Letter

Published
2020
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16. Epitaxial growth of highly symmetrical branched noble metal-semiconductor heterostructures with efficient plasmon-induced hot-electron transfer

Author

Zhai, Li, Gebre, Sara T., Chen, Bo, Xu, Dan, Chen, Junze, Li, Zijian, Liu, Yawei, Yang, Hua, Ling, Chongyi, Ge, Yiyao, Zhai, Wei, Chen, Changsheng, Ma, Lu, Zhang, Qinghua, Li, Xuefei, Yan, Yujie, Huang, Xinyu, Li, Lujiang, Guan, Zhiqiang, Tao, Chen-Lei, Huang, Zhiqi, Wang, Hongyi, Liang, Jinze, Zhu, Ye, Lee, Chun-Sing, Wang, Peng, Zhang, Chunfeng, Gu, Lin, Du, Yonghua, Lian, Tianquan, Zhang, Hua, and Wu, Xue-Jun

Published
2023
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42. Ultraviolet Nonlinear Optical Single Crystals of A Three‐Dimensional Chiral Covalent Framework Containing Te−O−B−O Bonds.

Author

Xue, Miaomiao, Zhang, Lei, Meng, Xin, Yang, Jinglun, He, Yanping, Lee, Chun‐Sing, Zhang, Jian, and Zhang, Qichun

Subjects
NONLINEAR optical materials, SINGLE crystals, NONLINEAR optics, STRUCTURAL stability, SPINE
Abstract

Extending covalent organic frameworks (COFs) into crystalline carbon‐free covalent backbones is an important strategy to endow these materials with more exotic functions. Integrating metal‐free inorganic and organic components into one covalent framework is an effective way to address the issue of poor thermal/solvent stability in the field of nonlinear optics (NLO). However, constructing such structures is very challenging. Here, we linked 3‐connected nods (BO3) and 2‐connected organic building blocks (Te(Ph)2) together to produce colorless single crystals (size up to 400 μm) of a three‐dimensional (3D) chiral covalent framework (CityU‐22). The single‐crystal X‐ray diffraction (SCXRD) analysis reveals that CityU‐22 has a non‐carbon Te−O−B−O bond‐based network with the srs topology. The chiral CityU‐22 displays good stability under the treatment of different common solvents or heat (the decomposition temperature above 300 °C). Due to its non‐π‐conjugated backbone (−Te−O−B−O−), CityU‐22 shows an ultraviolet NLO behavior with a second‐harmonic generation (SHG) response similar to KH2PO4 (KDP). [ABSTRACT FROM AUTHOR]

Published
2024
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43. Construction of Through‐Space Charge‐Transfer Nanoparticles for Facilely Realizing High‐Performance NIR‐II Cancer Phototheranostics.

Author

Lee, Ka‐Wai, Gao, Yijian, Chou, Shu‐Hua, Wan, Yingpeng, Hsu, Allen Chu‐Hsiang, Tan, Ji‐Hua, Li, Yuqing, Guan, Zhiqiang, Chen, Huan, Li, Shengliang, Wong, Ken‐Tsung, and Lee, Chun‐Sing

Subjects
HIGH resolution imaging, SMALL molecules, CHARGE transfer, MOLECULAR weights, NANOPARTICLES
Abstract

Phototheranostics with second near‐infrared (NIR‐II) emissions show great potential for disease diagnosis and imaging‐guided phototherapy owing to deep tissue penetration, high imaging resolution, and excellent tumor eradication. Recently, molecular conjugation engineering and J‐aggregation have been used to construct organic NIR‐II materials. However, these molecules generally have extensive conjugation and large molecular weight in the range of 700–1700 g mol−1, requiring complicated molecular design and synthesis. Herein, a NIR‐II emissive through‐space charge‐transfer (TSCT) nanoparticle (NP) using short‐conjugated donor‐acceptor (D‐A) molecules (TTP) is reported for high‐performance bioimaging and cancer phototheranostics. Owing to the short conjugation of the TTP molecule with a small molecular weight of only 518 g mol−1, the TTP monomer possesses visible absorption and first near‐infrared (NIR‐I) emission. Upon forming NPs in water, the efficient TSCT between TTP monomers leads to significantly red‐shifted absorption to the NIR‐I and emission to the NIR‐II region with a tail that extends to 1400 nm. TTP NPs are employed in NIR‐II in vivo blood‐vessel bioimaging and cancer phototheranostics successfully. This work introduces a facile strategy to construct NIR‐II emissive NPs based on short‐conjugated D‐A molecules for high‐performance biomedical applications. [ABSTRACT FROM AUTHOR]

Published
2024
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