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| Research on Preparation Process Optimization and Surface Enhanced Raman Spectroscopy (SERS) of Graphene-Silver Nanoparticle Composites |
| GONG Tian-cheng1,2, ZHU Yong1*, WANG Xin-yu1,3, WANG Ning1, ZHANG Jie1 |
1. Key Laboratory of Optoelectronic Technology & System, Education of Ministry, Chongqing University, Chongqing 400044, China
2. State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
3. Chongqing Engineering Research Center of Graphene Film Manufacturing, Chongqing 401329, China |
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Abstract Based on general preparation process of surface-enhanced Raman scattering (SERS) substrate of graphene-silver nanoparticles composites, the coupling agent has been used to improve the uniformity of silver nanoparticles adsorbed on the target substrates; bilayer of polymethylmethacrylate (PMMA) has been used to transfer graphene in order to reduce the defects of graphene; annealing treatment has been used to reduce the Raman background noise and improve the contrast of Raman spectra. The experimental results indicate that using the optimized preparation process can improve the uniformity of SERS substrate. The contrast of graphene Raman signal at G and 2D peak increased by 54.9% and 64.3%, respectively. The goodness of fit (R2) on the relationship between Raman intensities of Rhodamine 6G (R6G, at 774 and 1 363 cm-1) and concentration achieved 0.997 5 and 0.986 7, respectively.
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Received: 2016-08-13
Accepted: 2017-05-09
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Corresponding Authors:
ZHU Yong
E-mail: yongzhu@cqu.edu.cn
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