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首页> 外文期刊>Nanotechnology >Integrate silver colloids with silicon nanowire arrays for surface-enhanced Raman scattering
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Integrate silver colloids with silicon nanowire arrays for surface-enhanced Raman scattering

机译：将银胶体与硅纳米线阵列集成以进行表面增强拉曼散射

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摘要

A facile method to prepare uniform and reproducible surface-enhanced Raman scattering (SERS) substrates is presented. Quasi-spherical silver colloids prepared by microwave heating and wafer-scale uniform silicon nanowire (SiNW) arrays fabricated via wet chemical etching were united together as SERS substrates. The novel SERS substrates displayed stronger Raman enhancement than conventional silver colloids as well as outstanding uniformity and reproducibility in our experiments. In addition, it was found that the cross section of SiNW arrays possessed stronger enhancement activity than the front side. The enhancement effects of two adjacent SiNWs (as a simplification of SiNW arrays) were evaluated by the finite difference time domain (FDTD) method.
机译：提出了一种制备均匀且可再现的表面增强拉曼散射（SERS）基底的简便方法。通过微波加热制备的准球形银胶体和通过湿法化学蚀刻制备的晶圆级均匀硅纳米线（SiNW）阵列被结合在一起，作为SERS衬底。在我们的实验中，新型SERS底物显示出比常规银胶体更强的拉曼增强作用，以及出色的均匀性和可重复性。另外，发现SiNW阵列的横截面具有比正面更强的增强活性。通过有限差分时域（FDTD）方法评估了两个相邻的SiNW的增强效果（作为SiNW阵列的简化）。

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