Complexation of gold and silver nanoparticles with radiolytically-generated radicals

Complexation of gold and silver nanoparticles with radiolytically-generated radicals The reactivity of (SCN)˙− 2, Br˙− 2 and phenoxyl radicals in aqueous solution, generated by pulse radiolysis, was studied on gold and silver nanoparticle surfaces. The spectral changes associated with chemical interaction of radicals with metal nanoparticles were elucidated using time-resolved absorption spectroscopy. The resultant complexes of (SCN)˙− 2 and Br˙− 2 with Au nanoparticles have shown a strong absorption band at 390 nm and 260 nm, respectively. The stability of the particles after adsorption of SCN−, Br− and phenols was measured by steady-state absorption. It has been shown that the concentration of CTAB plays a significant role in the stabilization of particles in the presence of an adsorbate. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Complexation of gold and silver nanoparticles with radiolytically-generated radicals

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Publisher
Springer Journals
Copyright
Copyright © 2005 by VSP
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/1568567054908952
Publisher site
See Article on Publisher Site

Abstract

The reactivity of (SCN)˙− 2, Br˙− 2 and phenoxyl radicals in aqueous solution, generated by pulse radiolysis, was studied on gold and silver nanoparticle surfaces. The spectral changes associated with chemical interaction of radicals with metal nanoparticles were elucidated using time-resolved absorption spectroscopy. The resultant complexes of (SCN)˙− 2 and Br˙− 2 with Au nanoparticles have shown a strong absorption band at 390 nm and 260 nm, respectively. The stability of the particles after adsorption of SCN−, Br− and phenols was measured by steady-state absorption. It has been shown that the concentration of CTAB plays a significant role in the stabilization of particles in the presence of an adsorbate.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 1, 2005

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