Enhanced fluorescence transduction properties of metallic nanocavity arrays

We studied fluorescence enhancement of molecular species bound within metallic nanocavities. These nanostructures possess a number of desirable properties for real-time microarrays, such as localization of excitation light within the nanocavities, strong isolation from fluorescence produced by unbou...

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Bibliographic Details
Published inIEEE journal of selected topics in quantum electronics Vol. 11; no. 4; pp. 778 - 784
Main Authors Yongdong Liu, Mahdavi, F., Blair, S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Arrays
Biotechnology
Cities and towns
Excitation
Fluorescence
Kinetic theory
Mathematical models
molecular detection
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Nanostructures
Optical arrays
plasmonics
Plasmons
Quantum electronics
Semiconductor device measurement
Yield estimation
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Summary:We studied fluorescence enhancement of molecular species bound within metallic nanocavities. These nanostructures possess a number of desirable properties for real-time microarrays, such as localization of excitation light within the nanocavities, strong isolation from fluorescence produced by unbound species, and an apparent increase in fluorescence yield for bound species. Experimental measurements show nearly a factor of two increase in excitation intensity within the nanocavities, and factor of six increase in yield. A simple electromagnetic model of a dipole within a nanocavity shows an increase in radiative output consistent with our yield estimates, and also verifies the strong fluorescence isolation from species lying outside the nanocavity.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2005.857688