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Journal of Biomedical Optics

Shape-dependent sensitivity of single plasmonic nanoparticles for biosensing
Author(s): Takumi Sannomiya; Christian Hafner; Janos Vörös
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Paper Abstract

Shape-dependent sensitivity of localized surface plasmon-based biosensing was investigated by combining single-particle protein-sensing and multiple multipole program simulation. Significantly higher sensitivity was observed for tetrahedral particles than spherical ones, which was revealed by careful structural analysis of individually measured particles. The simulation of the corresponding particles with layered protein adsorption model showed consistent optical property and sensitivity, which were explained in terms of the field enhancement at the pointing edges.

Paper Details

Date Published: 1 November 2009
PDF: 6 pages
J. Biomed. Opt. 14(6) 064027 doi: 10.1117/1.3269678
Published in: Journal of Biomedical Optics Volume 14, Issue 6
Show Author Affiliations
Takumi Sannomiya, ETH Zürich (Switzerland)
Christian Hafner, ETH Zürich (Switzerland)
Janos Vörös, ETH Zürich (Switzerland)

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