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Abstract

The colloidal gold nanoparticles (AuNP) are synthesized by the classic Frens' method, and the sandwich-structured AuNP/graphene oxide/AuNP (AuNP/GO/AuNP) composite materials are constructed on the phosphorus doped diamond-like carbon film by the interface self-assembling. The surface enhanced Raman scattering behaviors of the AuNP/GO/AuNP composites are investigated by using the rhodamine B (RhB) as the probe molecules. Our results indicate that the Raman intensity of RhB obtained from the AuNP/GO/AuNP composites shows a 16.5-fold increase over that from the AuNP monolayer due to the coupled effect of chemical enhancement of GO and localized electromagnetic field enhancement of plasmonic gold. The designed composite materials with metal/GO/metal sandwich configuration exhibit great potential applications in biochemical analysis, environmental monitoring, disease controlling, and food safety.

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Funds:Project supported by the National Natural Science Foundation of China (Grant Nos. 51272237, 61274017, 51172208), the 521 Talents Training Program of Zhejiang Sci-Tech University, China (Grant No. 20132), the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars of Ministry of Education, China (Grant No. 2013693), and the Selected Scientific Research Program for Overseas Chinese Scholar of Zhejiang Province, China (Grant No. 2012323).

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Vol. 63, Issue 10 - 2014-05-20

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