光诱导还原纳米银修饰硅纳米线阵列活性基底的SERS研究
首发时间:2013-04-19
摘要:采用温度控制法制备出硅纳米线(SINWs)阵列,表面渡一层TiO2 薄膜作为衬底,紫外光诱导在其表面自组装纳米银修饰(Ag/SINWs),并以R6G作为探针分子来检测这种Ag/SINWs基底的表面增强拉曼散射(SERS)效应的增强活性和保持时间。实验结果显示Ag/SINW活性基底能清晰的检测出10-9mol/L浓度的R6G的特征谱,并且具有良好的SERS效应均匀性和可重复性。研究还发现Ag/SINWs活性基底具有一定的稳定性,在室温条件下存放30天后对于10-7 mol/L浓度的R6G依然能检测出特征峰,是一种新型的SERS活性基底。
关键词: 硅纳米线(SINWs) 光诱导还原 R6G 表面增强拉曼散射(SERS) SERS活性基底
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Surface-Enhanced Raman Scattering Study on Silicon Naniwire Arrays Decorated With Silver Nanoparticles
Abstract:Silicon naniwires (SINWs) array were prepared by chemical wet etching and decorated with a layer of TiO2 thin films, so the SERS substrate Ag/SINWs can be coated with silver nanoparticles under the condition of Uv irradiation .Based on the prepared substrate , the Raman spectroscopy of rhodamine 6G (R6G) can be obtained in low concentration as 10-9 M . The Raman mapping study show that the Ag/SINWs substrate has good enhancement ability and good uniformity . Detect the SERS of R6G with 10-7 M, during 1 to 30 days, the result indicate that the Ag/SINWs substrate has good stability under the condition of room temperature .So the Ag/SINWs is a suitable SERS active substrate.
Keywords: silicon naniwires(SINWs) photo-reduction R6G Surface-Enhanced Raman Scattering (SERS) SERS active substrate
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