Tailored nanoporous gold for ultrahigh fluorescence enhancement

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

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We report molecular fluorescence enhancement of free-standing nanoporous gold in which the nanoporosity can be arbitrarily tailored by the combination of dealloying and electroless gold plating. The nanoporous gold fabricated by this facile method possesses unique porous structures with large gold ligaments and very small pores, and exhibits significant improvements in surface enhanced fluorescence as well as structure rigidity. It demonstrates that the confluence effect of improved quantum yield and excitation of fluorophores is responsible for the large fluorescence enhancement due to the near-field enhancement of nanoporous gold, which arises from the strong electromagnetic coupling between neighboring ligaments and the weakening of plasmon damping of the large ligaments because of the small pore size and large ligament size, respectively.

Original languageEnglish
Pages (from-to)3795-3799
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number9
DOIs
Publication statusPublished - 2011 Mar 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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