Surface electron structures and mechanism of nonradiative transitions on crystalline TiO2 nanoparticles

Surface electron structures and mechanism of nonradiative transitions on crystalline TiO2 nanoparticles

Surface photovoltage spectroscopy and photoacoustic spectroscopy were combined to explore the surface electron structures of anatase TiO2 nanoparticles and their reorganization induced by the presence of the rutile phase. The presence of the rutile phase on the nanoparticles created a new surface st...

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Veröffentlicht in:Materials chemistry and physics 2008-12, Vol.112 (3), p.1001-1007
Hauptverfasser: Li, Kuiying, Ding, Ying Ying, Guo, Jing, Wang, Dayang
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container_title Materials chemistry and physics
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creator Li, Kuiying
Ding, Ying Ying
Guo, Jing
Wang, Dayang
description Surface photovoltage spectroscopy and photoacoustic spectroscopy were combined to explore the surface electron structures of anatase TiO2 nanoparticles and their reorganization induced by the presence of the rutile phase. The presence of the rutile phase on the nanoparticles created a new surface state, at the same time decreased the state density of. The critical weight fraction of the rutile phase was demonstrated 8 wt%, above which the surface electron structure of anatase TiO2 nanoparticles was turned from anatase to rutile-like. It was found after the relationship of the photogenic free charge carriers and the nonradiative transitions was confirmed that the surface electron reorganization greatly suppressed the nonradiative transitions.
doi_str_mv 10.1016/j.matchemphys.2008.07.010
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title Surface electron structures and mechanism of nonradiative transitions on crystalline TiO2 nanoparticles
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