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Silver Nanoparticles Stabilized by Thermoresponsive Microgel Particles: Synthesis and Evidence of an Electron Donor‐Acceptor Effect
Author(s) -
Dong Yang,
Ma Ying,
Zhai Tianyou,
Shen Fugang,
Zeng Yi,
Fu Hongbing,
Yao Jiannian
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700483
Subject(s) - x ray photoelectron spectroscopy , nanoparticle , transmission electron microscopy , materials science , silver nanoparticle , scanning electron microscope , spectroscopy , chemical engineering , electron donor , acrylic acid , polymer chemistry , nanotechnology , chemistry , copolymer , polymer , organic chemistry , catalysis , composite material , physics , quantum mechanics , engineering
Well‐dispersed silver nanoparticles were successfully fabricated within poly[( N ‐isopropylacrylamide)‐ co ‐(acrylic acid)] [P(NIPAM‐ co ‐AA)] microgel particles which were synthesized with different cross‐linking densities. Their structures were studied by field‐emission scanning electron microscopy, transmission electron microscopy, UV‐vis spectroscopy, X‐ray diffraction and FT‐IR spectroscopy. The interactions between the microgel particles and the incorporated silver nanoparticles were investigated by X‐ray photoelectron spectroscopy. The results revealed that there was charge transfer from the carbonyl groups of the microgel particles to the silver nanoparticles. Moreover, as the diameter of the AgNPs decreases, the charge‐transfer efficiency increases accordingly. The P(NIPAM‐ co ‐AA)/AgNPs hybrid microgel particles were thermoresponsive and their behavior completely reversible with several heating/cooling cycles.