Title

Influence Of Aging On The Properties Of Cerium Oxide Nanoparticles - Implications To Quantum Confinement Effect

Keywords

Cerium Oxide; Nanoparticles; Quantum Confinement

Abstract

Cerium oxide (ceria) nanoparticles are widely studied for their current and potential use in catalytic, energy, environment protection and bio-medical applications. The performance of ceria in most of the applications is dependent on the ability of cerium to switch between its +3 and +4 oxidation states. We synthesized ceria nanoparticles in several aqueous media and measured their oxidation states as a function of time using UV-Visible spectroscopy. By following changes in the absorption edge, we observed that sample synthesis conditions and processing history affect the oxidation state of cerium. These time dependent, environmentally induced changes in the band edge likely contribute to inconsistencies in the literature regarding quantum-confinement effects for ceria nanoparticles. © 2011 IEEE.

Publication Date

12-1-2011

Publication Title

Proceedings of the IEEE Conference on Nanotechnology

Number of Pages

646-650

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/NANO.2011.6144639

Socpus ID

84858961194 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84858961194

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