Directional Surface Plasmon Coupled Luminescence for Analytical Sensing Applications: Which Metal, What Wavelength, What Observation Angle?

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nihms152989.pdf (3.39 MB)

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https://pubs.acs.org/doi/10.1021/ac900973r

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https://doi.org/10.1021/ac900973r
 http://hdl.handle.net/11603/36554

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UMBC Chemistry & Biochemistry Department
UMBC Institute of Fluorescence (IoF)

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https://orcid.org/0000-0002-9110-6374

Date

2009-07-14

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journal articles
postprints
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Citation of Original Publication

Aslan, Kadir, and Chris D. Geddes. “Directional Surface Plasmon Coupled Luminescence for Analytical Sensing Applications: Which Metal, What Wavelength, What Observation Angle?” Analytical Chemistry 81, no. 16 (August 15, 2009): 6913–22. https://doi.org/10.1021/ac900973r.

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This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/ac900973r.

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Abstract

The ability of luminescent species in the near-field to both induce and couple to surface plasmons has been known for many years, with highly directional emission from films (Surface Plasmon Coupled Luminescence, SPCL) facilitating the development of sensitive near-field assay sensing platforms, to name but just one application. Because of the near-field nature of the effect, only luminescent species (fluorescence, chemiluminescence and phosphorescence) within a few hundred nanometers from the surface play a role in coupling, which in terms of biosensing, provides for limited penetration into optically dense media, such as in whole blood. Another attractive feature is the highly polarized and angular dependent emission which allows both fixed angle and wavelength dependent emission angles to be realized at high polarization ratios. In this paper, a generic procedure based on theoretical Fresnel calculations, which outlines the step-by-step selection of an appropriate metal for SPCL applications is presented. It is also shown that 11 different metals have differing properties in different spectral regions and offer either fixed angle or wavelength-dependent angular shifts in emission. In addition, it is shown that both chemiluminescence and phosphorescence can also be observed in a highly directional manner similar to coupled fluorescence.