|
Authors
|
König, M. ; Gupta, S. ; Uhlmann, P. ; Oertel, U. ; Stamm, M.
|
|
Title
|
Immobilization and in-situ synthesis of metal nanoparticles in polymer brushes
|
|
Date
|
09.10.2009
|
|
Number
|
20283
|
|
Abstract
|
Polymer brushes offer a simple way to fabricate smart brush-nanoparticle hybrids. In those systems the polymer brush does not only serve as a means to attach the particles to the surface but also to make their properties switchable in response to changes in the environment of the hybrid system. As an example we report herein on the immobilization of palladium and platinum nanoparticles (Pd/Pt NPs) onto pH- responsive poly(2-vinylpyridine) (P2VP) brushes. The process involves chemical grafting of P2VP chains on substrates in brush conformation followed by in situ synthesis of Pd or Pt NPs via chemical reduction of a metal salt solution in the presence of P2VP brushes. Immobilization of NPs onto the brush has been confirmed by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The catalytic activity of the brush-NP hybrids was tested by using the reduction of 4-nitrophenol with sodium borohydride as a model reaction which can be monitored by UV-vis-spectroscopy.
|
|
Publisher
|
Polymeric Materials: Science and Engineering
|
|
Wikidata
|
|
|
Citation
|
Polymeric Materials: Science and Engineering 101 (2009) 822-823
|
|
DOI
|
http://oasys2.confex.com/acs/238nm/techprogram/P1298015.HTM
|
|
Tags
|
|
