Monolayer graphene on nanostructured Ag for enhancement of surface-enhanced Raman scattering stable platform

被引：37

作者：

Dai, Zhigao ^{[1
,2
]}

Mei, Fei ^{[3
]}

Xiao, Xiangheng ^{[1
,2
,6
]}

Liao, Lei ^{[1
,2
]}

Wu, Wei ^{[4
]}

Zhang, Yupeng ^{[1
,2
]}

Ying, Jianjian ^{[1
,2
]}

Wang, Lingbo ^{[5
]}

Ren, Feng ^{[1
,2
]}

Jiang, Changzhong ^{[1
,2
]}

机构：

[1] Wuhan Univ, Dept Phys, Hubei Nucl Solid Phys Key Lab, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Ctr Ion Beam Applicat, Wuhan 430072, Peoples R China

[3] Hubei Univ Technol, Sch Elect & Elect Engn, Wuhan 430068, Peoples R China

[4] Wuhan Univ, Sch Printing & Packaging, Wuhan 430072, Peoples R China

[5] Wuhan Polytech, Coll Elect Informat Engn, Wuhan 430074, Peoples R China

[6] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

来源：

NANOTECHNOLOGY | 2015年 / 26卷 / 12期

基金：

中国博士后科学基金;

关键词：

Ag nanostructure-based substrate; sulfidation; surface-enhanced Raman scattering; ARRAYS; NANOWIRES; SUBSTRATE; FILMS;

D O I：

10.1088/0957-4484/26/12/125603

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

We have reported that the Ag nanostructure-based substrate is particularly suitable for surface-enhanced Raman scattering when it is coated with monolayer graphene, an optically transparent and chemistry-inertness material in the visible range. Ag bowtie nanoantenna arrays and Ag nanogrids were fabricated using plasma-assisted nanosphere lithography. Our measurements show that atmospheric sulfur containing compounds are powerless to break in the monolayer graphene to vulcanize the surfaces of the Ag bowtie nanoantenna arrays and Ag nanogrids by various means, including scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). Furthermore, the Ag nanostructure substrate coated with the monolayer graphene film shows a larger enhancement of Raman activity and the electromagnetic field than the uncoated substrate. Compared with those of bare Ag nanostructures, the averaged EFs of graphene-film-coated Ag nanostructures were estimated to be about 21 and 5 for Ag bowtie nanoantenna arrays and nanogrids after one month later in air, respectively. These observations are further supported by theoretical calculations.

引用

页数：9

共 40 条

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Lithography-free approach to highly efficient, scalable SERS substrates based on disordered clusters of disc-on-pillar structures [J].