Self-Assembled Flowerlike Europium-Doped Lanthanide Molybdate Microarchitectures and Their Photoluminescence Properties
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- 作者：Na Zhang ; Wenbo Bu ; Yunpeng Xu ; Danyu Jiang ; Jianlin Shi
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：April 5, 2007
- 年：2007
- 卷：111
- 期：13
- 页码：5014 - 5019
- 全文大小：540K
- 年卷期：v.111,no.13(April 5, 2007)
- ISSN：1932-7455
文摘
Three-dimensional flowerlike europium-doped lanthanide molybdate [La2(MoO4)3:Eu] microarchitectures thatexhibit efficient photoluminescence have been successfully synthesized via a facile hydrothermal process inthe presence of the surfactant bis(2-ethylhexyl)sulfosuccinate (AOT). The La2(MoO4)3:Eu microspheres arewell dispersed, have a uniform diameter of about 3 
m, and are composed of nanoflakes of about 30-nmthickness that connect to each other by both edge-to-edge and edge-to-flat-surface conjunctions with fewsurface-to-surface attachments. The surfactant NaAOT was found to play a crucial role in achieving the gooddispersibility and uniform morphology of the final product, as compared to the same material but synthesizedwithout the surfactant. The UV absorption results illustrate that there is a 20-nm blue shift of CT band relativeto bulk materials, which can be attributed to the quantum size effects of the nanoflakes. These La2(MoO4)3:Eu microspheres show efficient photoluminescence that is associated with the well-crystallized structures ofthe microarchitectures.
m, and are composed of nanoflakes of about 30-nmthickness that connect to each other by both edge-to-edge and edge-to-flat-surface conjunctions with fewsurface-to-surface attachments. The surfactant NaAOT was found to play a crucial role in achieving the gooddispersibility and uniform morphology of the final product, as compared to the same material but synthesizedwithout the surfactant. The UV absorption results illustrate that there is a 20-nm blue shift of CT band relativeto bulk materials, which can be attributed to the quantum size effects of the nanoflakes. These La2(MoO4)3:Eu microspheres show efficient photoluminescence that is associated with the well-crystallized structures ofthe microarchitectures.