作为表面增强拉曼光谱活性基底的纳米柱阵列的可控制备。

Controlled fabrication of nanopillar arrays as active substrates for surface-enhanced Raman spectroscopy.

作者信息

Ruan Chuanmin, Eres Gyula, Wang Wei, Zhang Zhenyu, Gu Baohua

机构信息

Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831, USA.

出版信息

Langmuir. 2007 May 8;23(10):5757-60. doi: 10.1021/la0636356. Epub 2007 Apr 11.

DOI:10.1021/la0636356

PMID:17425344

Abstract

Highly ordered gold nanopillar arrays were fabricated using anodized aluminum oxide (AAO) templates. Nanopillars with a dimension of 110 +/- 15 nm in vertical height and 75 +/- 10 nm in base diameter were formed with a density of 150 microm(-2). The ordered nanopillar arrays give reproducible surface-enhanced Raman scattering (SERS) at a detection limit of 10(-8) M using thionine as probing molecules. The enhancement by the Au nanopillar arrays was comparable with or better than that of dispersed gold nanoparticle SERS substrates. This work demonstrates a new technique for producing highly ordered and reproducible SERS substrates potentially applicable for chemical and biological assay.

摘要

采用阳极氧化铝（AAO）模板制备了高度有序的金纳米柱阵列。形成了垂直高度为110±15nm、基部直径为75±10nm的纳米柱，密度为150μm⁻²。使用硫堇作为探测分子时，这种有序的纳米柱阵列在10⁻⁸M的检测限下能产生可重复的表面增强拉曼散射（SERS）。金纳米柱阵列的增强效果与分散的金纳米颗粒SERS基底相当或更好。这项工作展示了一种生产高度有序且可重复的SERS基底的新技术，该技术可能适用于化学和生物分析。