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

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Langmuir

DOI:https://doi.org/10.1021/la0636356· OSTI ID:931523

Ruan, Chuanmin ^[1]; Eres, Gyula ^[1]; Wang, Wei ^[1]; Zhang, Zhenyu ^[1]; Gu, Baohua ^[1]

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1. ORNL

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931523
• Journal Information: Langmuir, Vol. 23, Issue 23; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

Nanopillar Arrays
surface-enhanced Raman scattering
SERS
thionine