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Proceedings Paper

3D-stacked Ag nanowires for efficient plasmonic light absorbers and SERS sensors
Author(s): Dong-Ho Kim; ChaeWon Mun; MinKyoung Lee; Sung-Gyu Park
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Paper Abstract

We report new 3D hybrid plasmonic nanostructures exhibiting highly sensitive SERS-based sensing performance, utilizing efficient plasmonic light absorption and analyte-enrichment effect. The hybrid plasmonic nanostructures composed of 3D-stacked Ag NWs and NPs separated by a thin hydrophobic dielectric interlayer. A hydrophobic polydimethylsiloxane (PDMS) interlayer provides dielectric nanogap between Ag NWs and NPs, and analyte-enrichment effect due to the inhibition of drop spreading. The 3D hybrid PDMS-interlayered Ag nanostructures showed hydrophobicity with initial contact angle of 137.6°. Utilizing the analyte-enrichment strategy, the PDMS-interlayered Ag nanostructures exhibited an enhanced sensitivity of methylene blue molecules by a factor of 10 (limit of detection, LOD of 1.5 nM), compared to the alumina-separated 3D hybrid Ag nanostructures.

Paper Details

Date Published: 18 April 2016
PDF: 5 pages
Proc. SPIE 9883, Metamaterials X, 988312 (18 April 2016); doi: 10.1117/12.2230674
Show Author Affiliations
Dong-Ho Kim, Korea Institute of Materials Science (Korea, Republic of)
ChaeWon Mun, Korea Institute of Materials Science (Korea, Republic of)
MinKyoung Lee, Korea Institute of Materials Science (Korea, Republic of)
Sung-Gyu Park, Korea Institute of Materials Science (Korea, Republic of)

Published in SPIE Proceedings Vol. 9883:
Metamaterials X
Allan D. Boardman; Nigel P. Johnson; Kevin F. MacDonald; Ekmel Özbay, Editor(s)

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