| 高荧光的水溶性CdTe量子点的合成及其生长规律研究 |
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| 引用本文： | 邓大伟,王珊珊,于俊生.高荧光的水溶性CdTe量子点的合成及其生长规律研究[J].鲁东大学学报,2011,27(1). |
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| 作者姓名： | 邓大伟 王珊珊 于俊生 |
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| 作者单位： | 生命分析化学教育部重点实验室南京大学化学化工学院; |
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| 基金项目： | 国家自然科学基金(20875045); 创新研究群体基金(20821063) |
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| 摘 要： | 以巯基乙酸(TGA)为稳定剂,通过有效引入Te源的方法,在水相中合成了高荧光的半导体CdTe量子点.其荧光发射波长在510—620nm范围内可调,最窄的半峰宽约为34nm,最高荧光量子产率可达到60%.用吸收和荧光光谱研究了其光谱特性,并用X射线粉末衍射、透射电镜、EDX谱和红外光谱对合成的CdTe纳米晶的形貌、组成和结构进行了表征.实验考察了溶液的pH值和前体组成比对合成CdTe纳米晶的影响.实验结果表明,合成溶液的pH对CdTe量子点的光谱特性和生长速率具有显著影响.随后讨论了巯基乙酸对CdTe纳米粒子在水溶液中的稳定作用,探讨了CdTe纳米晶在不同pH条件下的生长规律,提出了修正的纳米晶生长模型.
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| 关 键 词： | CdTe 半导体纳米晶 水相合成 高荧光量子产率 生长规律 |
Aqueous Synthesis of Highly Luminescent CdTe Quantum Dots and Its Growth Mechanism |
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| DENG Da-wei,WANG Shan-shan,YU Jun-sheng.Aqueous Synthesis of Highly Luminescent CdTe Quantum Dots and Its Growth Mechanism[J].Ludong University Journal (Natural Science Edition),2011,27(1). |
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| Authors: | DENG Da-wei WANG Shan-shan YU Jun-sheng |
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| Institution: | DENG Da-wei,WANG Shan-shan,YU Jun-sheng(Key Laboratory of Analytical Chemistry for Life Science,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China) |
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| Abstract: | The highly fluorescent CdTe quantum dots(QDs)have been synthesized by using thioglycolic acid(TGA) as a stabilizer and a new procedure of the introduction of Te source in aqueous solution.CdTe nanocrystals(NCs) have a tunable fluorescence emission wavelength range from 510 nm to 620 nm.Their narrowest full width at half maximum(FWHM) of about 34 nm,and the maximum quantum yield(QYs) of 60%.These CdTe nanocrystals were characterized by absorption and fluorescence spectroscopy,X-ray powder diffraction,transmi... |
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| Keywords: | CdTe semiconductor nanocrystals aqueous synthesis high photoluminescence quantum yield growth mechanism |
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