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  • Title: Controlled fabrication of nanopillar arrays as active substrates for surface-enhanced Raman spectroscopy.
    Author: Ruan C, Eres G, Wang W, Zhang Z, Gu B.
    Journal: Langmuir; 2007 May 08; 23(10):5757-60. PubMed ID: 17425344.
    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 microm(-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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