1. Synthesis and luminescent properties of oleic acid (OA)-modified CaF2: Eu nanocrystals
- Author
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Song, Limei, Gao, Jianhua, and Song, Ruijuan
- Subjects
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LUMINESCENCE , *OLEIC acid , *NANOCRYSTALS , *ORGANIC synthesis , *EUROPIUM , *EMISSION spectroscopy , *CALCIUM compounds - Abstract
Abstract: The OA-modified CaF2: Eu nanocrystals that can be well dispersed in chloroform to form a clear solution were synthesized and characterized. The nanocrystals have a roughly spherical shape with particle diameter of about 10nm. Possible mechanism was proposed to explain the growth process. Upon the excitation at 395nm, the room-temperature emission spectrum of the nanocrystals in chloroform presents the characteristic transitions 5D0→7F J of Eu3+ ions, with 5D0→7F2 (610nm) transition as the most prominent group. The luminescence decay of Eu3+ ions in CaF2 nanocrystals was also investigated and two luminescence lifetimes of 737μs (11.2%) and 2.08ms (88.8%) were obtained. [Copyright &y& Elsevier]
- Published
- 2010
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