| Temperature Dependence of the Fluorescence Emission Intensity of Eu/TiO2 Nanocrystals |
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| 作者姓名： | 曾庆光 丁泽军 巨新 王忆 盛业青 |
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| 作者单位： | [1]Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026 [2]Department of Mathematics and Physics, Wu Yi University, Jiangmen 529020 [3]Department of Physics, Nanjing University, Nanjing 210093 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10574121 and 10025420, the Natural Science Foundation of Anhui Province under Grant No 05021015, the Ministry of Education of China, and Chinese Academy of Sciences. |
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| 摘 要： | The samples of europium ions doped titanium dioxide （Eu^3＋/TiO2） nanocrystals are synthesized by a modified sol-gel method with hydrothermal treatment. The x-ray diffraction and scanning electron microscopy are used to characterize the sample. The temperature-dependent fluorescence emission effect of Eu^3＋-doped samples is investigated. It is found that under the excitation of 514.5nm light, the emission intensity of Eu^3＋ reaches a maximum value at 450K among various Eu^3＋ dopant concentrations in Eu^3＋ /TiO2 nanocrystals. The variation of the emission intensity may be attributed to the photon-assist absorption and the temperature-quenching effect.
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| 关 键 词： | Eu/TiO2 纳米晶体 荧光发射 温度 |
| 收稿时间： | 2007-2-5 |
| 修稿时间： | 2007-02-05 |
Temperature Dependence of the Fluorescence Emission Intensity of Eu/TiO2 Nanocrystals |
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| ZENG Qing-Guang,DING Ze-Jun,JU Xin,WANG Yi,SHENG Ye-Qing.Temperature Dependence of the Fluorescence Emission Intensity of Eu/TiO2 Nanocrystals[J].Chinese Physics Letters,2007,24(5):1368-1371. |
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| Authors: | ZENG Qing-Guang DING Ze-Jun JU Xin WANG Yi SHENG Ye-Qing |
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| Institution: | 1 Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026 2Department of Mathematics and Physics, Wu Yi University, Jiangmen; 529020 ; 3Department of Physics, Nanjing University, Nanjing 210093 |
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| Abstract: | The samples of europium ions doped titanium dioxide (Eu3+/TiO2) nanocrystals are synthesized by a modified sol-gel method with hydrothermal treatment. The x-ray diffraction and scanning electron microscopy are used to characterize the sample. The temperature-dependent fluorescence emission effect of Eu3+-doped samples is investigated. It is found that under the excitation of 514.5nm light, the emission intensity of Eu 3+ reaches a maximum value at 450K among various Eu 3+ dopant concentrations inEu3+/TiO2 nanocrystals. The variation of the emission intensity may be attributed to the photon-assist absorption and the temperature-quenching effect. |
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| Keywords: | 78 55 -m 61 10 -i 67 37 Hk 91 60 Ki |
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