Fluorescence amplification by electrochemically deposited silver nanowires with fractal architecture

Ewa M. Goldys*, Krystyna Drozdowicz-Tomsia, Fang Xie, Tanya Shtoyko, Eva Matveeva, Ignacy Gryczynski, Zygmunt Gryczynski

*Corresponding author for this work

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Electrochemically deposited silver structures with nanowires 50-100 nm in diameter show high fluorescence amplification and strongly reduced fluorescence lifetimes. Both quantities depend on the structure thickness. With increasing thickness the fluorescence amplification proportionally increases and the fluorescence lifetime decreases. This thickness dependence is caused by fluorophore interaction with a system of plasmon excitations in coupled nanowires extending over micrometer size regions. Thus the amplification is attributed to a combination of extended structure area and strong plasmonic coupling between nanowires which also help to radiatively scatter the fluorescence emission.

Original languageEnglish
Pages (from-to)12117-12122
Number of pages6
JournalJournal of the American Chemical Society
Volume129
Issue number40
DOIs
Publication statusPublished - 10 Oct 2007

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