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Proceedings Paper

Nanoplasmonic co-localization for highly sensitive surface plasmon resonance detection of molecular interactions
Author(s): Youngjin Oh; Yonghwi Kim; Wonju Lee; Donghyun Kim
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Paper Abstract

Surface plasmon resonance (SPR) has been applied to sensing biomolecular and drug interactions because it allows real-time monitoring and label-free detection. Traditional thin film based SPR biosensing suffers from moderate detection sensitivity. In this research, we investigate sensitivity enhancement by target colocalized SPR using various subwavelength nanostructures. The nanostructures were designed by calculating near-field distribution based on rigorous coupled-wave analysis. Experimentally, angled shadow evaporation was performed to fabricate the nanostructures for target colocalization and measured resonance shifts using angle scanning SPR. The feasibility was tested by measuring DNA hybridization. Experimental results confirm significantly enhanced detection sensitivity over traditional SPR techniques to be feasible. The results are expected to open a new approach to biomolecular detection based on SPR.

Paper Details

Date Published: 21 February 2013
PDF: 7 pages
Proc. SPIE 8597, Plasmonics in Biology and Medicine X, 85970R (21 February 2013); doi: 10.1117/12.2004227
Show Author Affiliations
Youngjin Oh, Yonsei Univ. (Korea, Republic of)
Yonghwi Kim, Yonsei Univ. (Korea, Republic of)
Wonju Lee, Yonsei Univ. (Korea, Republic of)
Donghyun Kim, Yonsei Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8597:
Plasmonics in Biology and Medicine X
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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