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

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

Research output: Contribution to journalArticlepeer-review

106 Scopus citations

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 150μm-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.

Original languageEnglish
Pages (from-to)5757-5760
Number of pages4
JournalLangmuir
Volume23
Issue number10
DOIs
StatePublished - May 8 2007

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