Fluorescence amplification by electrochemically deposited silver nanowires with fractal architecture.
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.
Goldys
Ewa M
EM
Macquarie University Biotechnology Research Institute, North Ryde 2109 NSW Australia. goldys@ics.mq.edu.au
Drozdowicz-Tomsia
Krystyna
K
Xie
Fang
F
Shtoyko
Tanya
T
Matveeva
Eva
E
Gryczynski
Ignacy
I
Gryczynski
Zygmunt
Z
D000818:Animals; D004563:Electrochemistry; D016650:Fluorescein-5-isothiocyanate / Q000031:analogs & derivatives / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D017709:Fractals; D006801:Humans; D007074:Immunoglobulin G / Q000737:chemistry; D018613:Microscopy, Confocal; D053770:Nanowires / Q000737:chemistry*; D012709:Serum Albumin / Q000737:chemistry; D012834:Silver / Q000737:chemistry*
C518288:FITC-albumin; D005456:Fluorescent Dyes; D007074:Immunoglobulin G; D012709:Serum Albumin; D012834:Silver; D016650:Fluorescein-5-isothiocyanate