June 2007

Journal

Controlled Fabrication of Nanopillar Arrays as Active Substrates for Surface-Enhanced Raman Spectroscopy

By:
Ruan, Chuanmin ; Eres, Gyula ; Wang, Wei ; Zhang, Zhenyu ; Gu, Baohua
Journal Name:
Langmuir
Page Number:
5757-5760
Volume:
23
Issue Number:
23
Publication Date:
June 13, 2007

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 ��m-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.


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