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Gold Nanostructures for Surface-Enhanced Raman Spectroscopy, Prepared by Electrodeposition in Porous Silicon

机译：通过在多孔硅中电沉积制备的用于表面增强拉曼光谱的金纳米结构

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Electrodeposition of gold into porous silicon was investigated. In the present study, porous silicon with ~100 nm in pore diameter, so-called medium-sized pores, was used as template electrode for gold electrodeposition. The growth behavior of gold deposits was studied by scanning electron microscope observation of the gold deposited porous silicon. Gold nanorod arrays with different rod lengths were prepared, and their surface-enhanced Raman scattering properties were investigated. We found that the absorption peak due to the surface plasmon resonance can be tuned by changing the length of the nanorods. The optimum length of the gold nanorods was ~600 nm for surface-enhanced Raman spectroscopy using a He–Ne laser. The reason why the optimum length of the gold nanorods was 600 nm was discussed by considering the relationship between the absorption peak of surface plasmon resonance and the wavelength of the incident laser for Raman scattering.
机译：研究了金在多孔硅中的电沉积。在本研究中，孔径约为100 nm的多孔硅（所谓的中型孔径）被用作金电沉积的模板电极。通过扫描电子显微镜观察金沉积的多孔硅来研究金沉积物的生长行为。制备了不同杆长的金纳米棒阵列，研究了其表面增强拉曼散射特性。我们发现可以通过改变纳米棒的长度来调节由于表面等离子体共振引起的吸收峰。使用He–Ne激光进行表面增强拉曼光谱分析时，金纳米棒的最佳长度约为600 nm。通过考虑表面等离子体激元共振的吸收峰与拉曼散射的入射激光波长之间的关系，讨论了金纳米棒的最佳长度为600 nm的原因。

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