Graphene modulated 2D assembly of plasmonic gold nanostructure on diamond-like carbon substrate for surface-enhanced Raman scattering

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• 作者：Aiping Liu^a ; ^b ; ^{liuaiping1979@gmail.com} ; Tao Xu^a ; Qinghua Ren^a ; Ming Yuan^a ; Wenjun Dong^a ; Weihua Tang^c
• 关键词：Metallic plasmonics ; Reduced graphene oxide ; Surface-enhanced Raman scattering ; Electrochemical deposition ; Enhancement mechanism
• 刊名：Electrochemistry Communications
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：25
• 期：Complete
• 页码：74-78
• 全文大小：1235 K

文摘

A close-packed 2D assembly of plasmonic gold nanostructure was fabricated on a diamond-like carbon film by a two-step electrodeposition via reduced graphene oxide (rGO) modulation. The oxygen functionalities at the rGO surface which were controlled by changing electrochemical reduction time of GO provided reactive sites for nucleation and growth of gold nanoparticles. The Raman intensity of rhodamine B obtained from the gold assembly showed an 860-fold increase compared with that from Si reference, indicating a coupling of localized electromagnetic field enhancement and chemical enhancement. Our research offered a novel way for metallic plasmonic fabrication to realize their potential applications in biochemical analysis, environmental monitoring, disease detection and food safety.