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

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 μm-2. The ordered nanopillar arrays give reproducible surface-enhanced...

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Bibliographic Details
Published in:Langmuir 2007-05, Vol.23 (10), p.5757-5760
Main Authors: Ruan, Chuanmin, Eres, Gyula, Wang, Wei, Zhang, Zhenyu, Gu, Baohua
Format: Article
Language:English
Subjects:
Aluminum Oxide - chemistry
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold - chemistry
Nanopillar Arrays
Physical and chemical studies. Granulometry. Electrokinetic phenomena
SERS
Spectrum Analysis, Raman
Surface Properties
surface-enhanced Raman scattering
thionine
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Summary: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 μm-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.
ISSN:0743-7463
1520-5827
DOI:10.1021/la0636356