Gold nanoparticle-coated silicon cone array for surface-enhanced Raman spectroscopy |
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| Authors: | Chun-hong Lai Gang Chen XiaoSheng Zhang HaiXia Zhang Yi Xu |
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| Affiliation: | 1. School of Optoelectronics Engineering, Chongqing University, Chongqing, China;2. School of Physics and Electronic Information, China West Normal University, NanChong, China;3. Science and Technology on Micro/Nano Fabrication Lab, Peking University, Beijing, China;4. School of Chemical Engineering, Chongqing University, Chongqing, China |
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| Abstract: | ![]()
ABSTRACTWe demonstrate a silicon cone array substrate coated with gold nanoparticles and which was highly sensitive, homogeneous, and provided a large area for surface-enhanced Raman spectroscopy (SERS). A deep reactive ion-etching process was used to fabricate the high-density silicon cone array, and gold nanoparticles were formed on the silicon cone surface by magnetron sputtering. The substrate was tested with 10?6 M rhodamine 6 G solution. Enhancement of the substrate was about 60-fold greater than that of flat substrate. Moreover, SERS signals obtained from 24 random areas on the substrate showed good homogeneity with an average standard deviation of 3.9%. |
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| Keywords: | Gold nanoparticle silicon nanocone array surface-enhanced Raman spectroscopy |
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