Size dependence of molecular fluorescence enhancement of nanoporous gold

X. Y. Lang, P. F. Guan, Ling Zhang, T. Fujita, M. W. Chen

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number073701
JournalApplied Physics Letters
Volume96
Issue number7
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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