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Optofluidically Tuned Fluorescence Enhancement by Plasmonic Nanocup Arrays

Published online by Cambridge University Press:  18 December 2014

Sujin Seo ,
Abid Ameen  and
Gang Logan Liu
Sujin Seo
Affiliation:
Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green Street, Urbana, IL 61801, U.S.A.
Abid Ameen
Affiliation:
Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green Street, Urbana, IL 61801, U.S.A.
Gang Logan Liu
Affiliation:
Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 306 N. Wright Street, Urbana, IL 61801, U.S.A.
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Abstract

We demonstrate fluidically tuned fluorescence enhancement on the colorimetric substrate with the plasmonic effects induced by the periodic gold nanocup arrays. The fluorescence enhancement by the plasmonic effect has been studied extensively by varying the geometries of nanostructures or the morphology of nanoparticles. In this study, however, the fluorescence enhancement without changing these parameters but simply by varying surrounding media on the colorimetric plasmonic surface is accomplished. The dynamic responses of fluorescence from self-assembled monolayer of dyes on the surface were monitored by flowing various fluids with different refractive indices. The dependence of the radiative decay rate as well as the scattering cross-section on the surrounding dielectric properties results into the selective enhancement of the fluorescence intensity, having a maximum at different surrounding refractive index for different fluorophores with different emission band centers.

Keywords

optical propertiessensorself-assembly
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1720: Symposium D – Materials and Concepts for Biomedical Sensing , 2014 , mrsf14-1720-d06-03
Copyright
Copyright © Materials Research Society 2014 

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References

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