Fabrication of graphene oxide/Ag hybrids and their surface-enhanced Raman scattering characteristics

Zhijiang Qian; Yuchuan Cheng; Xufeng Zhou; Jinghua Wu; Gaojie Xu

doi:10.1016/j.jcis.2013.01.049

Fabrication of graphene oxide/Ag hybrids and their surface-enhanced Raman scattering characteristics

J Colloid Interface Sci. 2013 May 1:397:103-7. doi: 10.1016/j.jcis.2013.01.049. Epub 2013 Feb 4.

Authors

Zhijiang Qian¹, Yuchuan Cheng, Xufeng Zhou, Jinghua Wu, Gaojie Xu

Affiliation

¹ Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China.

PMID: 23425548
DOI: 10.1016/j.jcis.2013.01.049

Abstract

A kind of surface-enhanced Raman scattering (SERS) substrate with high sensitivity was prepared via covalent assembly between silver nanoparticles (AgNPs) and graphene oxide (GO) sheets. With the high specific surface area, GO sheets can adsorb plenty of AgNPs; moreover, these adsorbed AgNPs formed some gathered state which can generate more hot spots of SERS. 4-Mercaptopyridine (4-MPY) was used to evaluate the SERS performance of the as-prepared substrate. The Raman enhancement factor (EF) of 4-MPY on the GO/AgNPs hybrids was up to 5.04×10(7), and the detection limit was estimated to be as low as 1 nM. The result showed that GO/AgNPs hybrids can produce stronger signals compared to silver colloids.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Graphite / chemistry*
Metal Nanoparticles / chemistry*
Silver / chemistry*
Spectrum Analysis, Raman / methods

Substances

Silver
Graphite