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

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

作者信息

Fukami Kazuhiro, Chourou Mohamed L, Miyagawa Ryohei, Muñoz Noval Álvaro, Sakka Tetsuo, Manso-Silván Miguel, Martín-Palma Raúl J, Ogata Yukio H

机构信息

Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan.

Department of Applied Physics, University Autonoma de Madrid, Carretera Colmenar Viejo, KM 15,500, 28049 Madrid, Spain.

出版信息

Materials (Basel). 2011 Apr 14;4(4):791-800. doi: 10.3390/ma4040791.

DOI:10.3390/ma4040791

PMID:28879950

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5448520/

Abstract

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.

摘要

研究了金在多孔硅中的电沉积。在本研究中，孔径约为100nm的多孔硅，即所谓的中等尺寸孔隙，被用作金电沉积的模板电极。通过对金沉积多孔硅的扫描电子显微镜观察，研究了金沉积物的生长行为。制备了具有不同棒长的金纳米棒阵列，并研究了它们的表面增强拉曼散射特性。我们发现，由于表面等离子体共振引起的吸收峰可以通过改变纳米棒的长度来调节。对于使用氦氖激光的表面增强拉曼光谱，金纳米棒的最佳长度约为600nm。通过考虑表面等离子体共振吸收峰与拉曼散射入射激光波长之间的关系，讨论了金纳米棒最佳长度为600nm的原因。