Deposition of Silver Dentritic Nanostructures on Silicon for Enhanced Fluorescence

Silver dendritic (“fractal”) structures exhibit very high fluorescence enhancement, but their nonuniformity limits practical applications. Here, we present a novel, electroless deposition approach to produce uniform silver dendritic nanostructures on silicon for enhanced fluorescence. These metal-mo...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2010-01, Vol.114 (3), p.1562-1569
Main Authors: Drozdowicz-Tomsia, Krystyna, Xie, Fang, Goldys, Ewa M
Format: Article
Language:English
Subjects:
C: Nanops and Nanostructures
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Summary:Silver dendritic (“fractal”) structures exhibit very high fluorescence enhancement, but their nonuniformity limits practical applications. Here, we present a novel, electroless deposition approach to produce uniform silver dendritic nanostructures on silicon for enhanced fluorescence. These metal-modified surfaces were allowed to bind a protein bovine serum albumin (BSA) labeled with the fluorescent dye Deep Purple. The effect of silver nanostructures on fluorescence intensity and lifetime in the presence of a conductive, absorbing substrate was analyzed, and high enhancement factors between 30 and 40 times were found. Such silicon-based structures with high fluorescence enhancement factors are suitable for integration with lab-on-chip and biosensing microelectronic devices.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp9114942