Open Access Nano Express

Fabrication of nanowire network AAO and its application in SERS

Qi Jiwei, Li Yudong, Yang Ming, Wu Qiang, Chen Zongqiang, Peng Jingyang, Liu Yue, Wang Wudeng, Yu Xuanyi, Sun Qian* and Xu Jingjun*

Author Affiliations

The MOE Key Laboratory of Weak-Light Nonlinear Photonics, Tianjin Key Laboratory of Photonics and Technology, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin 300457, China

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Nanoscale Research Letters 2013, 8:495  doi:10.1186/1556-276X-8-495

Published: 21 November 2013

Abstract

In this paper, nanowire network anodized aluminum oxide (AAO) was fabricated by just adding a simple film-eroding process after the production of porous AAO. After depositing 50 nm of Au onto the surface, nanowire network AAO can be used as ultrasensitive and high reproducibility surface-enhanced Raman scattering (SERS) substrate. The average Raman enhancement factor of the nanowire network AAO SERS substrate can reach 5.93 × 106, which is about 14% larger than that of commercial Klarite® substrates. Simultaneously, the relative standard deviations in the SERS intensities are limited to approximately 7%. All of the results indicate that our large-area low-cost high-performance nanowire structure AAO SERS substrates have a great advantage in chemical/biological sensing applications.

Keywords:
Surface-enhanced Raman scattering; AAO; Nanowire network