Enhanced Fluorescence Emission of Me-ADOTA by Self-Assembled Silver Nanoparticles on a Gold Film.
Chem Phys Lett
; 476(1): 46-50, 2009 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-20161182
ABSTRACT
We report a multi-fold enhancement of the fluorescence of methyl-azadioxatriangulenium chloride (Me-ADOTA*Cl) in PVA deposited on a 50 nm thick gold mirror carrying an evaporation induced self-assembly of colloidal silver nanoparticles (Ag-SACs). The average measured increase in fluorescence emission of about 50-fold is accompanied by hot spots with a local enhancement in brigthness close to 200. The long lifetime of the dye allows for the first direct determination of the correlation between the enhancement of emission intensity and the decrease in fluorescence lifetime. The Ag-SACs surface preparation and observed enhancements are highly reproducible. We believe that these robust plasmonic surfaces will find use in sensing platforms for ultrasensitive detection.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Chem Phys Lett
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Estados Unidos