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dc.contributor.authorClinton, Jamie C.en
dc.date.accessioned2014-03-14T20:31:10Zen
dc.date.available2014-03-14T20:31:10Zen
dc.date.issued2008-01-25en
dc.identifier.otheretd-01292008-104526en
dc.identifier.urihttp://hdl.handle.net/10919/31065en
dc.description.abstractFluorescence spectra and UV-Vis absorption spectra are collected on cerium oxide nanocrystalline particles. While CeO2 is the stable form of bulk cerium oxide, ceria nanoparticles exhibit a nonstoichiometric composition, CeO2-γ, due to the presence of oxygen vacancies and the formation of Ce2O3 at the grain boundaries. The Ce(III) ions, which are more reactive and therefore more desirable for various applications, are created by oxygen vacancies, which act as defects in the CeO2-γ crystal lattice. These defects form trap states in the band gap of CeO2, which can be seen in the absorption spectra. Ce(III) is required for fluorescence of the ceria nanoparticles while Ce(IV) is involved in only nonradiative transitions. The optical spectroscopy results show that the ceria samples have different ratios of Ce(III) ions to Ce(IV) ions, which is verified by x-ray photoemission spectroscopy (XPS).en
dc.publisherVirginia Techen
dc.relation.haspartjamie_clinton_thesis_rev2.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCerium Oxideen
dc.subjectOptical Spectroscopyen
dc.subjectAbsorptionen
dc.titleColloidal Cerium Oxide Nanoparticle: Synthesis and Characterization Techniquesen
dc.typeThesisen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineElectrical and Computer Engineeringen
dc.contributor.committeechairMeehan, Kathleenen
dc.contributor.committeememberDavis, Richey M.en
dc.contributor.committeememberAgah, Masouden
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01292008-104526/en
dc.date.sdate2008-01-29en
dc.date.rdate2008-02-25en
dc.date.adate2008-02-25en


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