Reduction of silver nanoparticles onto graphene oxide nanosheets with <Emphasis Type="Italic">N</Emphasis>,<Emphasis Type="Italic">N</Emphasis>-dimethylformamide and SERS activities of GO/Ag composites |
| |
| Authors: | Ying-Kui Yang Cheng-En He Wen-Jie He Lin-Juan Yu Ren-Gui Peng Xiao-Lin Xie Xian-Bao Wang Yiu-Wing Mai |
| |
| Institution: | (1) Ministry-of-Education Key Laboratory for Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan, 430062, China;(2) Center for Advanced Materials Technology (CAMT) School of Aerospace, Mechanical and Mechatronic Engineering, J07, The University of Sydney, Sydney, NSW, 2006, Australia;(3) School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China |
| |
| Abstract: | Silver nanoparticles (Ag NPs) have been homogeneously deposited onto graphene oxide (GO) nanosheets by an optimal method,
in which N,N-dimethylformamide (DMF) as a co-dispersant of GO and reductant of sliver ions is added to an aqueous suspension of GO and
AgNO3. GO nanosheets are uniformly covered by Ag NPs with a narrow size distribution and inter-particle gap. Raman signals of GO
are greatly enhanced after deposition owing to the charge transfer interaction of GO with Ag NPs. The GO/Ag composite can
be further utilized as an effective surface-enhanced Raman scattering (SERS) active substrate. Several new Raman bands and
frequency shifts are clearly observed in using 4-aminothiophenol (4-ATP) as a Raman probe on GO/Ag compared to the normal
Raman spectrum of solid 4-ATP. The Raman enhancement arises from a major electromagnetic effect and a minor chemical effect. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
