Journal of Shanghai University(Natural Science Edition) ›› 2013, Vol. 13 ›› Issue (5): 479-484.doi: 10.3969/j.issn.1007-2861.2013.05.008

• Environmental and Chemical Engineering • Previous Articles     Next Articles

Controlled Fabrication of Highly Ordered Au Nanoarrays as SERS Active Substrates

ZHOU Yi, FU Qun, WANG Sha-sha, ZHANG Hong-chao, LEI Bo, LEI Yong, WU Ming-hong   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2013-04-09 Online:2013-10-28 Published:2013-10-28

Abstract: A simple and versatile method for fabricating surface-enhanced Raman scattering (SERS) active substrate with high uniformity, structural controllability, high sensitivity and great stability is reported. The ordered aluminum template formed during the synthesis of anodic aluminum oxide (AAO) film was used as the
concaved matrix. Au nanocap arrays as SERS active substrates were prepared through thermally evaporation. Taking Rhodamine 6G (R6G) as probing molecules, SERS spectra were investigated. The results indicates that these SERS active substrates displayed very strong SERS performances (Raman enhancement factor >1×107). Comparing with the ordinary Au film, the SERS enhancement effect of the Au nanocap array is about seven times stronger at 1 363 cm−1. A 6-month-old sample almost kept the same SERS activity with the newly prepared sample. Such ordered Au nanocap arrays allows application in the detection of chemical and biological molecules with trace amounts.

Key words: enhancement factor, ordered Au nanocap array, surface-enhanced Raman scattering (SERS), anodic aluminum oxide (AAO) template, stability

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