Improved SERS Performance from Au Nanopillar Arrays by Abridging the Pillar Tip Spacing by Ag Sputtering

Authors

  • Zhulin Huang,

    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China)
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  • Guowen Meng,

    Corresponding author
    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China)
    • Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China).
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  • Qing Huang,

    1. Key Laboratory of Ion Beam Bioengineering, Institute of Plasma Physics Chinese, Academy of Sciences Hefei, 230031 (P. R. China)
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  • Yajun Yang,

    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China)
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  • Chuhong Zhu,

    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China)
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  • Chaolong Tang

    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei. 230031 (P. R. China)
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Abstract

original image

Ag-capped Au nanopillar arrays on a resin supporter (see left upper figure), with a typical adjacent pillar tip gap of 10 nm, show obviously higher surface-enhanced Raman scattering (SERS) sensitivity (right column in red) than that of the bare Au nanopillar array while using 10 nM R6G as probe molecules. The large-area Ag-capped Au nanopillar array has potential in trace detection of special chemicals.

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