29 April 2016 Optical sensing of peroxide using ceria nanoparticles via fluorescence quenching technique
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Abstract
This study introduces the application of small ceria nanoparticles (NPs) as optical sensor for peroxide using fluorescence quenching technique. Our synthesized ceria nanoparticles have the ability to adsorb peroxides via its oxygen vacancies. Ceria nanoparticles (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 ~520nm, with reduced peak intensity peaks 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.%. This research work could be applied further in optical sensors of radicals in biomedical engineering and environmental monitoring.
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N. Shehata, E. Samir, S. Gaballah, "Optical sensing of peroxide using ceria nanoparticles via fluorescence quenching technique", Proc. SPIE 9899, Optical Sensing and Detection IV, 98991P (29 April 2016); doi: 10.1117/12.2227856; https://doi.org/10.1117/12.2227856
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