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In this work particles of ZnO of size range 33–56 Å were prepared by a sol–gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV–vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than...
In this work particles of ZnO of size range 33–56 Å were prepared by a sol–gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV–vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than...
Nano-size cerium-doped yttrium oxide was investigated with the aim of influencing host and activator-related electronic transitions by size reduction. Complete quenching of Ce 3+ luminescence in micro- and single-crystalline forms of this system has been attributed earlier to ionization of the cerium 5d electron to the conduction band of yttrium oxide upon excitation of a single f-electron...
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