使用阳极氧化铝模板的镍纳米线的激光分子束外延：一种新型表面增强拉曼散射活性衬底。

Laser-MBE of nickel nanowires using AAO template: a new active substrate of surface enhanced Raman scattering.

作者信息

Zhang Lisheng, Fang Yan, Zhang Pengxiang

机构信息

Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Capital Normal University, Beijing 100037, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2008 Jan;69(1):91-5. doi: 10.1016/j.saa.2007.03.035. Epub 2007 Mar 30.

DOI:10.1016/j.saa.2007.03.035

PMID:17627875

Abstract

The highly ordered anodic aluminum oxide (AAO) template was fabricated using aluminum anodizing in electrolytes with two-step method, which apertures were about 50-80nm. The nickel nanowires with about 40-70nm in diameter was prepared on the AAO template by laser-MBE (molecular beam epitaxy). And high quality Raman spectra of SudanII were obtained on the glass covered with the nickel nanowires. On the nickel nanowires there are both surface enhanced Raman scattering (SERS) and tip enhanced Raman scattering (TERS). The new observations not only enlarge the range of SERS applications, but also imply a possible new enhancement mechanism. Otherwise the Raman and SERS frequencies of SudanII molecule were calculated using, respectively, DFT and B3PW91.

摘要

采用两步法在电解液中对铝进行阳极氧化制备了高度有序的阳极氧化铝（AAO）模板，其孔径约为50 - 80nm。通过激光分子束外延（MBE）在AAO模板上制备了直径约为40 - 70nm的镍纳米线。并且在覆盖有镍纳米线的玻璃上获得了苏丹红II的高质量拉曼光谱。在镍纳米线上同时存在表面增强拉曼散射（SERS）和针尖增强拉曼散射（TERS）。这些新发现不仅扩大了SERS的应用范围，还暗示了一种可能的新增强机制。此外，分别使用密度泛函理论（DFT）和B3PW91计算了苏丹红II分子的拉曼和SERS频率。