Eu3+⇆Eu2+ redox reactions in bulk and nano CaF2:Eu

被引：17
|
作者：
Pandey, Charusmita
Dhopte, S. M.
Muthal, P. L.
Kondawar, V. K.
Moharil, S. V. [1 ]
机构：
[1] Natl Environm Engn Res Inst, Nagpur 440020, Maharashtra, India
[2] Nagpur Univ, Dept Phys, Nagpur 440010, Maharashtra, India
来源：
RADIATION EFFECTS AND DEFECTS IN SOLIDS | 2007年 / 162卷 / 09期
关键词：
CaF2 : Eu; photoluminescence; radiation effects; nano;
D O I：
10.1080/10420150701197547
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Eu3+-> Eu2+ conversion caused by thermal treatments and exposures to ionizing radiations was studied using photoluminescence in bulk and nano powders of CaF2: Eu. It was found that there is no radiation- induced Eu3+. Eu2+ conversion in the nano powders. Thermal Eu3+. Eu2+ conversion, on the other hand, takes place at much lower temperatures in the nano powders as compared to the bulk. The different behaviors are discussed in terms of the quantum confinement and the differences in the local environments.
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页码：651 / 658
页数：8
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