Synthesis of Positively Charged Luminescent CdTe Nanocrystals in Aqueous Solution |
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Authors: | Lei Zou Jian Wang Zheng Fang Zhenyu Gu |
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Affiliation: | Laboratory for Advanced Materials, Department of Chemistry , East China University of Science and Technology , Shanghai, China |
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Abstract: | Highly luminescent positively charged CdTe nanocrystals were prepared from a facile and reproducible approach by the reaction of Cd2+ and HTe? in the presence of mercaptoethylamine. The influence of various experimental variables, including pH value, growth temperature, Te-to-Cd ratio, as well as Cd-to-ligand ratio, on the growth rate and optical properties of CdTe nanocrystals have been systematically investigated. Experimental results indicate that the pH value and Te-to-Cd molar ratio play the crucial role in determining luminescent properties of the obtained CdTe nanocrystals. The mechanism for the resulting high-quality optical properties of the resulting CdTe nanocrystals was also elucidated. |
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Keywords: | Aqueous synthesis CdTe nanocrystals photoluminescence positively charged |
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