Biological sensor based on localized surface plasmon associated with surface-bound Au/polystyrene composite microparticles

Hiroyuki Takei

doi:10.1117/12.322095

10 September 1998 Biological sensor based on localized surface plasmon associated with surface-bound Au/polystyrene composite microparticles

Hiroyuki Takei

Author Affiliations +

Proceedings Volume 3515, Microfluidic Devices and Systems; (1998) https://doi.org/10.1117/12.322095
Event: Micromachining and Microfabrication, 1998, Santa Clara, CA, United States

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.

Citation Download Citation

Hiroyuki Takei "Biological sensor based on localized surface plasmon associated with surface-bound Au/polystyrene composite microparticles", Proc. SPIE 3515, Microfluidic Devices and Systems, (10 September 1998); https://doi.org/10.1117/12.322095

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