| 光谱学与光谱分析 |
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| SERS Mechanism for Rhodium Electrode in the Ultraviolet Region |
| YANG Zhi-lin1, 2, WU De-yin1, REN Bin1, ZHOU Hai-guang2, TIAN Zhong-qun1* |
1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, China
2. Department of Physics, Xiamen University, Xiamen 361005, China |
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Abstract Stable and good quality of Surface-Enhanced Raman Scattering (SERS) signal from net rhodium electrode in the ultraviolet region was observed for the first time by our group recently. In this paper, both qualitative and quantitative analyses are given to interpret the new experimental results mainly based on the electromagnetic field theory. The mechanisms of SERS for rhodium electrode in the ultraviolet region are mainly attributed to the lightning rod effect together with the weak surface plasmon resonance. According to the calculation, the surface-averaged enhancement factor (SEF) for rhodium electrode in the ultraviolet region is about two orders of magnitude when the surface of the substrate is roughened properly, which is in good agreement with the experimental results. The authors also give a comparative study to show why silver, which is the best SERS active substrate in the visible and near infrared region, can’t give any SERS signal when the 325 nm excitation line is used.
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Received: 2003-12-16
Accepted: 2003-03-26
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Corresponding Authors:
TIAN Zhong-qun
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| Cite this article: |
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YANG Zhi-lin,WU De-yin,REN Bin, et al. SERS Mechanism for Rhodium Electrode in the Ultraviolet Region [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(06): 682-685.
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| URL: |
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http://www.gpxygpfx.com/EN/Y2004/V24/I06/682 |
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