Research Papers

Enhancement of luminescent quenching based oxygen sensing by gold nanoparticles: comparison between luminophore:matrix:nanoparticle thin films on glass and gold coated substrates

[+] Author Affiliations
Philip J. R. Roche, Maurice C.-K. Cheung, Lei Yao, Andrew G. Kirk, Vamsy P. Chodavarapu

McGill University, Department of Electrical and Computer Engineering, McConnell Engineering Building, Montreal, Quebec H3A 2A7 Canada

J. Nanophoton. 4(1), 043521 (November 23, 2010). doi:10.1117/1.3526729
History: Received September 9, 2010; Revised November 1, 2010; Accepted November 8, 2010; November 23, 2010; Online November 23, 2010
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Abstract

For weak luminescence, quenching of insensitive luminophores by proximity to a gold film improves signal to noise by suppression of background luminescence of Ru(4,7-diphenyl-1,10-anthroline)3Cl2. Initially it was expected that the effects of gold film quenching and nanoparticle enhanced luminescence could be combined to give a summative improvement, but the increase caused by the nanoparticles generates a larger signal to noise ratio and greater sensitivity of those luminophores to the dynamic quenching by gaseous oxygen. Impressive detection limits were achieved on gold coated glass and plain glass, where detection limit was 0.05% and 0.004% and sensitivity 0.02 and 0.05%, respectively.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Philip J. R. Roche ; Maurice C.-K. Cheung ; Lei Yao ; Andrew G. Kirk and Vamsy P. Chodavarapu
"Enhancement of luminescent quenching based oxygen sensing by gold nanoparticles: comparison between luminophore:matrix:nanoparticle thin films on glass and gold coated substrates", J. Nanophoton. 4(1), 043521 (November 23, 2010). ; http://dx.doi.org/10.1117/1.3526729


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