Sers: Plasmonic Nanogap-Enhanced Raman Scattering Using a Resonant Nanodome Array (Small 18/2012)

Authors

  • Hsin-Yu Wu,

    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 208 North Wright Street, Urbana, IL 61801, USA
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  • Charles J. Choi,

    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 208 North Wright Street, Urbana, IL 61801, USA
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  • Brian T. Cunningham

    Corresponding author
    1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 208 North Wright Street, Urbana, IL 61801, USA
    2. Department of Bioengineering, University of Illinois at Urbana-Champaign, 1304 West Springfield Avenue, Urbana, Illinois 61801, USA
    • Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 208 North Wright Street, Urbana, IL 61801, USA.
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Abstract

original image

PNA substrates created by B. T. Cunningham and co-workers on page 2878 provide a dense array of electromagnetic hot spots within ∼10 nm gaps between adjacent gold domes. The structures are inexpensively produced over large surface areas on flexible plastic substrates using nanoreplica molding to produce an array of polymer cylinders. The nanogap spacing is controlled via the thickness of deposited films of silicon dioxide and metal, so the structure can be produced without lithography. These PNA substrates are suitable for the real-time detection of biological and chemical compounds.

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