Issue 6, 2014

Microlandscaping on a graphene oxide film via localized decoration of Ag nanoparticles

Abstract

A direct and facile method for micro-landscaping of Ag nanoparticles on reduced graphene oxide (rGO) is presented. This method employs a focused laser beam to achieve local reduction of Ag+ ions to Ag NPs by laser irradiation on a GO film that is submerged in AgNO3 solution. Using this method, the Ag nanoparticles can be directly anchored on a rGO film, creating a microlandscape of Ag nanoparticles on the rGO film. In addition, varying the intensity of the laser beam can control the shapes, sizes and distributions of Ag nanoparticles. The resulting hybrid materials exhibit surface enhanced Raman scattering of up to 16 times depending on the size and number density of silver nanoparticles. In addition, the hybrid Ag–rGO material shows superior photoresponse when compared to rGO.

Graphical abstract: Microlandscaping on a graphene oxide film via localized decoration of Ag nanoparticles

Article information

Article type
Paper
Submitted
09 Oct 2013
Accepted
12 Dec 2013
First published
20 Dec 2013

Nanoscale, 2014,6, 3143-3149

Microlandscaping on a graphene oxide film via localized decoration of Ag nanoparticles

H. F. Teoh, Pham. Dzung, W. Q. Lim, J. H. Chua, K. K. Lee, Z. Hu, H. Tan, E. S. Tok and C. H. Sow, Nanoscale, 2014, 6, 3143 DOI: 10.1039/C3NR05373C

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