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Proceedings Paper

Effect of metallic nanowires on the sensitivity enhancement of surface plasmon resonance biosensors
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Paper Abstract

In this study, we experimentally confirmed the sensitivity enhancement by the nanowire-based surface plasmon resonance (SPR) sensor structure. Gold nanowire samples with a period of 500 nm were fabricated by interference lithography on a gold-SF10 glass substrate. Sensitivity enhancement compared to a conventional SPR structure was measured to be 31% when evaluated using a varied concentration of ethanol at a dielectric surrounding layer. This result is consistent with numerical data of rigorous coupled-wave analysis. Rough surfaces of thin gold film and gold nanowires are deemed to induce the sensitivity degradation by more than 10%. More significant sensitivity improvement can be achieved by implementing finer nanowires.

Paper Details

Date Published: 14 February 2007
PDF: 8 pages
Proc. SPIE 6450, Plasmonics in Biology and Medicine IV, 64500H (14 February 2007); doi: 10.1117/12.699914
Show Author Affiliations
Kyung Min Byun, Seoul National Univ. (South Korea)
Soon Joon Yoon, Yonsei Univ. (South Korea)
Donghyun Kim, Yonsei Univ. (South Korea)
Sung June Kim, Seoul National Univ. (South Korea)


Published in SPIE Proceedings Vol. 6450:
Plasmonics in Biology and Medicine IV
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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