期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 34, 页码 11910-11917出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201906329
关键词
block copolymers; catalytic activity; nanoparticles; nanoreactors; optical properties
资金
- Air Force Office of Scientific Research [FA9550-16-1-0187, FA9550-19-1-0317]
- National Science Foundation [CMMI 1727313, 1903957]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1903957] Funding Source: National Science Foundation
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据