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Journal of Nanophotonics

Plasmonic platforms of self-assembled silver nanostructures in application to fluorescence
Author(s): Rafal Luchowski; Nils Calander; Tanya Shtoyko; Elisa Apicella; Julian Borejdo; Zygmunt K. Gryczynski; Ignacy Gryczynski
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Paper Abstract

Fluorescence intensity changes were investigated theoretically and experimentally using self-assembled colloidal structures on silver semitransparent mirrors. Using a simplified quasi-static model and finite element method, we demonstrate that near-field interactions of metallic nanostructures with a continuous metallic surface create conditions that produce enormously enhanced surface plasmon resonances. The results were used to explain the observed enhancements and determine the optimal conditions for the experiment. The theoretical parts of the studies are supported with reports on detailed emission intensity changes which provided multiple fluorescence hot spots with 2-3 orders of enhancements. We study two kinds of the fluorophores: dye molecules and fluorescent nanospheres characterized with similar spectral emission regions. Using a lifetime-resolved fluorescence/reflection confocal microscopy technique, we find that the largest rate for enhancement (~1000-fold) comes from localized areas of silver nanostructures.

Paper Details

Date Published: 1 September 2010
PDF: 18 pages
J. Nanophoton. 4(1) 043516 doi: 10.1117/1.3500463
Published in: Journal of Nanophotonics Volume 4, Issue 1
Show Author Affiliations
Rafal Luchowski, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)
Nils Calander, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)
Tanya Shtoyko, The Univ. of Texas at Tyler (United States)
Elisa Apicella, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)
Julian Borejdo, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)
Zygmunt K. Gryczynski, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)
Ignacy Gryczynski, Univ. of North Texas Health Science Ctr. at Fort Worth (United States)


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