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Hybrid Gold Architectures for Sensing and Catalytic Applications

Published online by Cambridge University Press:  31 January 2011

Hyunjoon Song
Hyunjoon Song*
Affiliation:
hsong@kaist.ac.kr, KAIST, Chemistry, 335 Gwahangno, Yuseong-gu, Daejeon, 305701, Korea, Republic of, 82423502847, 82423502810
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Abstract

Exquisite control of surface functionality is essential to tailor the chemical and physical properties of metal nanocrystals to the requirements of specific applications. Hybridization of gold nanoparticles with other components such as polymers and metal oxides can effectively introduce appropriate functionalities on the surface without changing their own properties, and thereby become a basic architecture for various applications such as sensors and catalysts. In the present work, we report two hybrid nanostructures comprising gold nanocrystals. PDMAEMA (poly(dimethylaminoethylmethacrylate))–gold hybrid nanocrystals were synthesized via a polyol process, which produced carboxylate functionality on the gold surface. This hybrid structure was employed for a sensitive pH-sensor in solution. On the other hand, porous silica-gold hybrid nanoreactors were produced by selective etching of gold cores from gold@silica core-shell particles. The nanoreactor framework exhibited high and controllable activity on the reduction of aromatic nitroxides. These two examples of hybrid gold architectures would be able to apply for other metal and metal oxide systems to develop biosensors and energy production catalysts.

Keywords

Aunanostructurepolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1176: Symposium Y – Nanocrystalline Materials as Precursors for Complex Multifuntional Structures through Chemical Transformations and Self Assembly , 2009 , 1176-Y07-07
Copyright
Copyright © Materials Research Society 2009

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