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We report molecular fluorescence enhancement of free-standing nanoporous gold with tunable nanopore size. The fluorescence intensity of indocynanine green adsorbed on human-serum-albumin-coated nanoporous gold films significantly increases with decreasing nanopore size. The large fluorescence enhancement results from the near-field enhanced excitation and radiative decay rate of fluorophore due to the strong electromagnetic fields produced by nanosized curvatures as well as the coupling between the neighbor gold ligaments.
Published in:
Applied Physics Letters
(Volume:96
,
Issue:
7
)
Date of Publication: Feb 2010
- Page(s):
- 073701 - 073701-3
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.3323104
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 February 2010
- Issue Date :
- Feb 2010
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