Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

Yuanxin Du; Yuan Zhao; Yan Qu; Chia-Hao Chen; Chieh-Ming Chen; Cheng-Hao Chuang; Yanwu Zhu

doi:10.1039/C4TC00353E

Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

Yuanxin Du,^a Yuan Zhao,^a Yan Qu,^b^c Chia-Hao Chen,^d Chieh-Ming Chen,^e Cheng-Hao Chuang^e and Yanwu Zhu*^a

* Corresponding authors

^a Department of Materials Science and Engineering & CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, 96 Jin Zhai Rd, Hefei 230026, China
E-mail: zhuyanwu@ustc.edu.cn

^b Wuxi Graphene Technologies Co., Ltd, 311 Yanxin Rd, Wuxi 214174, China

^c Jiangnan Graphene Research Institute, 6 Xiangyun Rd, Changzhou 213149, China

^d National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan

^e Department of Physics, Tamkang University, New Taipei City 25137, Taiwan

Abstract

By simply coating graphene films on Au nanoparticles, the optical properties of the hybrid films are investigated. It is found that the coverage of a monolayer graphene film leads to a decreased transmittance of up to 15.8% in the visible range, much higher than the 2.3% transmittance loss for intrinsic graphene. At the same time, the plasmonic resonance of the hybrid films experiences a red-shift in resonance frequency and a broadening in the transmission dip. By means of finite element simulations, these observations are attributed to strong light–matter interaction at the interface between graphene and Au nanoparticles, as indicated by the increased absorption cross section and higher electric field intensity. The electron transfer between graphene and Au nanoparticles is confirmed by high resolution X-ray photoelectron spectroscopy studies. Furthermore, the enhanced electromagnetic hot spots at the interface between graphene and Au nanoparticles make such graphene–Au nanoparticle hybrid films cost-effective and high-performance surface-enhanced Raman scattering substrates for detecting organic molecules such as rhodamine-6G, for which an enhancement factor of ∼10⁷ is achieved.

Supplementary files

Publication details

The article was received on 21 Feb 2014, accepted on 15 Apr 2014 and first published on 16 Apr 2014

Article type: Paper

DOI: 10.1039/C4TC00353E

Author version available: Download Author version (PDF)

Citation: J. Mater. Chem. C, 2014,2, 4683-4691

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Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

Y. Du, Y. Zhao, Y. Qu, C. Chen, C. Chen, C. Chuang and Y. Zhu, J. Mater. Chem. C, 2014, 2, 4683
DOI: 10.1039/C4TC00353E
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Journal of Materials Chemistry C

Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

Abstract

Supplementary files

Publication details

Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

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