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

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

doi:10.1021/la0636356

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

Langmuir. 2007 May 8;23(10):5757-60. doi: 10.1021/la0636356. Epub 2007 Apr 11.

Authors

Chuanmin Ruan¹, Gyula Eres, Wei Wang, Zhenyu Zhang, Baohua Gu

Affiliation

¹ Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831, USA.

PMID: 17425344
DOI: 10.1021/la0636356

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.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Aluminum Oxide / chemistry*
Gold / chemistry*
Spectrum Analysis, Raman
Surface Properties

Substances

Gold
Aluminum Oxide