Fabrication of silver-coated silicon nanowire arrays for surface-enhanced Raman scattering by galvanic displacement processes
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| Title: | Fabrication of silver-coated silicon nanowire arrays for surface-enhanced Raman scattering by galvanic displacement processes |
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| Authors: | Sun, Xianzhong1, Lin, Linhan1, Li, Zhengcao1, Zhang, Zhengjun1, Feng, Jiayou fengjy@mail.tsinghua.edu.cn |
| Source: | Applied Surface Science. Nov2009, Vol. 256 Issue 3, p916-920. 5p. |
| Subjects: | Nanowires, Silicon, Metal coating, Silver nitrate, Nanocomposite materials, Surface enhanced Raman effect, Microfabrication, Solution (Chemistry) |
| Abstract: | Abstract: Silver-coated silicon nanowire (SiNW) arrays were prepared utilizing galvanic displacement processes consisting of three steps: galvanic displacement deposition of silver particles using a HF–AgNO3 or NH4F–AgNO3 aqueous solution; formation of SiNW arrays by a silver-assisted chemical etching process conducted in the HF–H2O2 aqueous solution; deposition of silver particles on the SiNW arrays from the NH4F–AgNO3 aqueous solution. The effects of the morphology of pre-deposited silver particles and deposition solution on the formation of silver-coated SiNW arrays were discussed. Surface-enhanced Raman scattering (SERS) performances have been studied using Rhodamine 6G (R6G) probe molecules on the silver-coated SiNW substrates. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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