Metal-enhanced chemiluminescence: Radiating plasmons generated from chemically induced electronic excited states.
In this letter, we report the observation of metal-enhanced chemiluminescence. Silver Island films, in close proximity to chemiluminescence species, can significantly enhance luminescence intensities; a 20-fold increase in chemiluminescence intensity was observed as compared to an identical control sample containing no silver. This suggests the use of silver nanostructures in the chemiluminescence-based immunoassays used in the biosciences today, to improve signal and therefore analyte detectability. In addition, this finding suggests that surface plasmons can be directly excited by chemically induced electronically excited luminophores, a significant finding toward our understanding of fluorophore-metal interactions and the generation of surface plasmons.
Chowdhury
Mustafa H
MH
Center for Fluorescence Spectroscopy, Medical Biotechnology Center, University of Maryland School of Medicine, 725 West Lombard Street, Baltimore, Maryland 21201.
Aslan
Kadir
K
Malyn
Stuart N
SN
Lakowicz
Joseph R
JR
Geddes
Chris D
CD