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Article

Surface-Enhanced Fluorescence on Silver Fractal-Like Structures. An Experiment for Analytical or Physical Chemistry

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Abby Roth , Tanya Shtoyko , Brian K. Taylor and Arika Pravitasari

Department of Chemistry, The University of Texas at Tyler, Tyler, TX 75799

Zygmunt Gryczynski , Evgenia G. Matveeva and Ignacy Gryczynski

Center for Commercialization of Fluorescence Technologies, Department of Molecular Biology and Immunology, University of North Texas, Health Science Center, Fort Worth, TX 76107

I-Fen Chang

Department of Cell Biology and Genetics, University of North Texas, Health Science Center, Fort Worth, TX 76107

J. Chem. Educ., 2009, 86 (6), p 715

DOI: 10.1021/ed086p715

Publication Date (Web): June 1, 2009

Abstract

We designed a laboratory experiment to illustrate the use of localized surface plasmon resonance (LSPR) to study surface-enhanced fluorescence (SEF) of Rhodamine B on silver fractal-like structures. The experiment described in this article is applicable to an undergraduate laboratory course in analytical or physical chemistry. Students grow silver fractals on microscope slides. Films of Rhodamine B are placed on the silver fractals and clean microscope slides. The fluorescence signals of Rhodamine B on the fractals are measured and compared to Rhodamine B on the clean slides. The students observe how the fluorescence is enhanced by the presence of the silver nanostructures using a confocal microscope.