Gold on graphene as a substrate for surface enhanced Raman scattering study

被引：78

作者：

Wang, Yingying ^{[1
]}

Ni, Zhenhua ^{[2
]}

Hu, Hailong ^{[1
]}

Hao, Yufeng ^{[3
]}

Wong, Choun Pei ^{[1
]}

Yu, Ting ^{[1
]}

Thong, John T. L. ^{[3
]}

Shen, Ze Xiang ^{[1
]}

机构：

[1] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore

[2] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China

[3] Natl Univ Singapore, Dept Elect & Comp Engn, Ctr Integrated Circuit Failure Anal & Reliabil, Singapore 117576, Singapore

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 16期

关键词：

SPECTROSCOPY; FILMS; FLUORESCENCE;

D O I：

10.1063/1.3505335

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we report our study on gold (Au) films with different thicknesses deposited on single layer graphene (SLG) as surface enhanced Raman scattering (SERS) substrates for the characterization of rhodamine (R6G) molecules. We find that an Au film with a thickness of similar to 7 nm deposited on SLG is an ideal substrate for SERS, giving the strongest Raman signals for the molecules and the weakest photoluminescence (PL) background. While Au films effectively enhance both the Raman and PL signals of molecules, SLG effectively quenches the PL signals from the Au film and molecules. The former is due to the electromagnetic mechanism involved while the latter is due to the strong resonance energy transfer from Au to SLG. Hence, the combination of Au films and SLG can be widely used in the characterization of low concentration molecules with relatively weak Raman signals. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3505335]

引用

页数：3

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