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Light-enabled reversible self-assembly and tunable optical properties of stable hairy nanoparticles

https://doi.org/10.1073/pnas.1714748115

Chen, Yihuang; Wang, Zewei; He, Yanjie; Yoon, Young Jun; Jung, Jaehan; Zhang, Guangzhao; Lin, Zhiqun (February 2018, Proceedings of the National Academy of Sciences)
Poly(urea ester): A family of biodegradable polymers with high melting temperatures

https://doi.org/10.1002/pola.28355

Tang, Donglin; Chen, Zijian; Correa-Netto, Felipe; Macosko, Christopher W.; Hillmyer, Marc A.; Zhang, Guangzhao (December 2016, Journal of Polymer Science Part A: Polymer Chemistry)

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Hairy Uniform Permanently Ligated Hollow Nanoparticles with Precise Dimension Control and Tunable Optical Properties

https://doi.org/10.1021/jacs.7b04545

Chen, Yihuang; Yang, Di; Yoon, Young Jun; Pang, Xinchang; Wang, Zewei; Jung, Jaehan; He, Yanjie; Harn, Yeu Wei; He, Ming; Zhang, Shuguang; et al (September 2017, Journal of the American Chemical Society)

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Resolving Optical and Catalytic Activities in Thermoresponsive Nanoparticles by Permanent Ligation with Temperature‐Sensitive Polymers

https://doi.org/10.1002/anie.201906329

Chen, Yihuang; Wang, Zewei; Harn, Yeu Wei; Pan, Shuang; Li, Zili; Lin, Shaoliang; Peng, Juan; Zhang, Guangzhao; Lin, Zhiqun (July 2019, Angewandte Chemie International Edition)

Abstract Thermoresponsive nanoparticles (NPs) represent an important hybrid material comprising functional NPs with temperature‐sensitive polymer ligands. Strikingly, significant discrepancies in optical and catalytic properties of thermoresponsive noble‐metal NPs have been reported, and have yet to be unraveled. Reported herein is the crafting of Au NPs, intimately and permanently ligated by thermoresponsive poly(N‐isopropylacrylamide) (PNIPAM), in situ using a starlike block copolymer nanoreactor as model system to resolve the paradox noted above. As temperature rises, plasmonic absorption of PNIPAM‐capped Au NPs red‐shifts with increased intensity in the absence of free linear PNIPAM, whereas a greater red‐shift with decreased intensity occurs in the presence of deliberately introduced linear PNIPAM. Remarkably, the absence or addition of free linear PNIPAM also accounts for non‐monotonic or switchable on/off catalytic performance, respectively, of PNIPAM‐capped Au NPs.
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