Graphene Oxide Sheath on Ag Nanoparticle/Graphene Hybrid Films as an Antioxidative Coating and Enhancer of Surface-Enhanced Raman Scattering

被引：84
作者：
Kim, Young-Kwan [2 ,3 ]
Han, Sang Woo [2 ,3 ]
Min, Dal-Hee [1 ]
机构：
[1] Seoul Natl Univ, Dept Chem, Seoul 151747, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea
[3] Korea Adv Inst Sci & Technol, KI NanoCentury, Taejon 305701, South Korea
来源：
ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
graphene oxide; protective coating; silver nanoparticle; surface enhanced Raman scattering; surface functionalization; SILVER NANOPARTICLES; AROMATIC-MOLECULES; OXIDATION; SPECTROSCOPY; FABRICATION; COMPOSITES; REDUCTION;
D O I：
10.1021/am301658p
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Surface-enhanced Raman scattering (SERS) has been extensively investigated since its discovery on rough Ag surface because of high sensitivity and resolution. Ag nanostructures are considered highly active for SERS but their liability to oxidization impedes their practical applications as a SEAS-based sensing platform. Here, we show that graphene oxide (GO) coating on the polyallylamine hydrochloride (PAA) functionalized Ag nanoparticles (PAA-AgNP) immobilized on PAA-functionalized reduced GO (PAA-RGO) films (GO/PAA-AgNP/PAA-RGO, sandwich structure) protect AgNPs from oxidation under ambient condition for prolonged time up to 72 days with increased and reproducible SERS signals and fast adsorption kinetics of rhodamine 6G, a model Raman probe molecule. The present strategy for GO coating on top of the immobilized AgNPs will be useful for the development of an efficient SERS-based chemical and biosensor because of its simplicity, cost-effectiveness, long-term stability, and high reproducibility.
引用
收藏
页码：6545 / 6551
页数：7
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