期刊
APPLIED SURFACE SCIENCE
卷 316, 期 -, 页码 22-27出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.07.084
关键词
Tryptophan; Silver-graphene oxide composites; Surface-enhanced Raman scattering
类别
资金
- National Natural Science Foundation of China [31300691, 61335011, 61275187, 81071790]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20114407110001, 200805740003, 20134407120003]
- Natural Science Foundation of Guangdong Province [9251063101000009]
- Guangdong province
- Ministry of Education of PR China [2011A090200011]
Silver-graphene oxide (Ag-GO) nanocomposites were in situ fabricated rapidly through a green one-pot method by using tryptophan (Trp) as a reducing and stabilizing agent. The morphologies of synthesized Ag-GO nanocomposites were characterized by UV-vis absorption spectroscopy, transmission electron microscopy (TEM), and micro-Raman system. The results indicated silver nanoparticles (Ag NPs) with spherical size were well dispersed on the surface of graphene oxide (GO). The role of pH has been explored to obtain optimum reaction conditions during the growth process. Raman signals of GO were greatly enhanced after Ag NPs loaded on its surface. More importantly, the synthesized Ag-GO nanocomposites exhibited excellent surface-enhanced Raman scattering (SERS) activity as SERS substrates to detect crystal violet (CV) in aqueous solution, and the enhancement factor (EF) from the intensity of the vibrational mode at 1621 cm(-1) was calculated to be 1.6 x 10(5). (C) 2014 The Authors. Published by Elsevier B.V.
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