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Journal of Nanophotonics

Optical sensing of peroxide using ceria nanoparticles via fluorescence quenching technique
Author(s): Nader Shehata; Effat Samir Ahmed Fathallah; Soha Gaballah; Mohamed Salah ElSayed Mahmoud
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Paper Abstract

This study introduces the application of ceria nanoparticles (NPs) as an optical sensor for peroxide using fluorescence quenching technique. Our synthesized ceria NPs have the ability to adsorb peroxides via its oxygen vacancies. Ceria NPs solution with added variable concentrations of hydrogen peroxides is exposed through near-UV excitation and the detected visible fluorescent emission is found to be at ∼520  nm. The fluorescent intensity peak is found to be reduced with increasing the peroxide concentrations due to static fluorescence quenching technique. The relative intensity change of the visible fluorescent emission has been reduced to more than 50% at added peroxide concentrations up to 10 wt. %. In order to increase ceria peroxides sensing sensitivity, lanthanide elements such as samarium (Sm) are used as ceria NPs dopant. This research work could be applied further in optical sensors of radicals in biomedical engineering and environmental monitoring.

Paper Details

Date Published: 8 July 2016
PDF: 9 pages
J. Nanophoton. 10(3) 036002 doi: 10.1117/1.JNP.10.036002
Published in: Journal of Nanophotonics Volume 10, Issue 3
Show Author Affiliations
Nader Shehata, Alexandria Univ. (Egypt)
Utah State Univ. (United States)
Effat Samir Ahmed Fathallah, Alexandria Univ. (Egypt)
Soha Gaballah, Alexandria Univ. (Egypt)
Mohamed Salah ElSayed Mahmoud, Alexandria Univ. (Egypt)

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