Resolving Optical and Catalytic Activities in Thermoresponsive Nanoparticles by Permanent Ligation with Temperature‐Sensitive Polymers
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 11, 2019
- Source ID
- 10.1002/anie.201906329
Entities
People
- Guangzhao Zhang
- Juan Peng
- Shaoliang Lin
- Shuang Pan
- Yeu Wei Harn
- Yihuang Chen
- Zewei Wang
- Zhiqun Lin
- Zili Li
Organizations
- Air Force Office of Scientific Research
- Fudan University
- Georgia Tech
- National Science Foundation
- University of Science and Technology of China