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Proceedings Paper

Biological sensor based on localized surface plasmon associated with surface-bound Au/polystyrene composite microparticles
Author(s): Hiroyuki Takei
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Paper Abstract

We describe here a simple method for forming uniform surface-bound Au particles by using as a template monodisperse polystyrene spheres with diameters in the range of 100 to 350 nm; a dense submonolayer of the sphere was first formed on a substrate, followed by evaporation of Au. Cap-shaped Au particles were formed on the top half of the sphere. The particles exhibited strong optical absorption in the UV--near IR range whose peak position depended on the refractive index of the immediate environment. We show how the particle can be patterned on a substrate as well as modified with biomolecules in anticipation of incorporating the particles as a miniature biological sensor into micro analytical devices.

Paper Details

Date Published: 10 September 1998
PDF: 6 pages
Proc. SPIE 3515, Microfluidic Devices and Systems, (10 September 1998); doi: 10.1117/12.322095
Show Author Affiliations
Hiroyuki Takei, Hitachi, Ltd. (Japan)

Published in SPIE Proceedings Vol. 3515:
Microfluidic Devices and Systems
A. Bruno Frazier; Chong Hyuk Ahn, Editor(s)

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