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摘要
<jats:p>A new synthetic chemical coprecipitation route for the preparation of well-crystallized size controlled nano- and microcrystalline cubes of CaF<jats:sub>2</jats:sub>is reported. Crystalline cubes in the range of 2 <jats:italic>μ</jats:italic>m–20 nm could be synthesized and their sizes were controlled by varying the solvent : cosolvent ratio. The as-synthesized CaF<jats:sub>2</jats:sub>nanocubes were characterized by different techniques. Photoluminescence (PL) emission spectrum of CaF<jats:sub>2</jats:sub>nanocrystalline powder showed strong emission band at 415 nm. Moreover, the effect of Eu as a dopant on the emission spectrum of CaF<jats:sub>2</jats:sub>was investigated. This dopant was found to get incorporated in its Eu<jats:sup>2+</jats:sup>and Eu<jats:sup>3+</jats:sup>forms. The as-produced nanocubes were exposed to UV irradiation and the corresponding PL emission was studied. Excellent results are obtained, where CaF<jats:sub>2</jats:sub>:Eu nanocubes were found to be highly sensitive and might be suitable for esteeming the doses of UV irradiation using the PL technique.</jats:p>
- 出版日期2015
