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TiO2/Ag composite nanowires for a recyclable surface enhanced Raman scattering substrate |
Deng Chao-Yue (邓超越), Zhang Gu-Ling (张谷令), Zou Bin (邹斌), Shi Hong-Long (施洪龙), Liang Yu-Jie (梁玉洁), Li Yong-Chao (李永超), Fu Jin-Xiang (付金祥), Wang Wen-Zhong (王文忠) |
School of Science, Minzu University of China, Beijing 100081, China |
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Abstract Multifunctional TiO2/Ag composite nanowires are fabricated with a hydrothermal method by precipitating Ag nanoparticles (NPs) on the surfaces of TiO2 nanowires. This hierarchical one-dimensional (1D) nanostructure can be used as a surface enhanced Raman scattering (SERS) substrate with high sensitivity, for detecting the rhodamine 6G (R6G) in a wide range of low concentrations (from 1×10-6 M to 1×10-12 M). In addition, the substrate can be self-cleaned under the irradiation of ultraviolet (UV) light due to the superior photocatalytic capacity of the TiO2/Ag composite nanostructure, making the recycled use of SERS substrates closer to reality. With both the evident SERS performance and high efficiency of photocatalytic capacity, such TiO2/Ag composite nanowires demonstrate considerable potential in the chemical sensing of organic pollutants.
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Received: 20 January 2013
Revised: 11 April 2013
Accepted manuscript online:
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PACS:
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61.46.Km
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(Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))
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78.30.Er
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(Solid metals and alloys ?)
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78.68.+m
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(Optical properties of surfaces)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10705056), the "985 Project" (Grant No. 98507-010009), the "211 Project" of Ministry of Education of China, the Pilot Project of Comprehensive Reform for the Specialty of Applied Physics of Minzu University of China, and the Undergraduate Research Training Program of Minzu University of China (Grant Nos. GCCX 2012110007 and 2012110008). |
Corresponding Authors:
Zhang Gu-Ling
E-mail: glzhang@muc.edu.cn
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Cite this article:
Deng Chao-Yue (邓超越), Zhang Gu-Ling (张谷令), Zou Bin (邹斌), Shi Hong-Long (施洪龙), Liang Yu-Jie (梁玉洁), Li Yong-Chao (李永超), Fu Jin-Xiang (付金祥), Wang Wen-Zhong (王文忠) TiO2/Ag composite nanowires for a recyclable surface enhanced Raman scattering substrate 2013 Chin. Phys. B 22 106102
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