Correlation between the Photoluminescence and Oriented Attachment Growth Mechanism of CdS Quantum Dots

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• 作者：Jinsheng Zheng ; Feng Huang ; Shungao Yin ; Yongjing Wang ; Zhang Lin ; Xiaoli Wu ; Yibing Zhao
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：July 21, 2010
• 年：2010
• 卷：132
• 期：28
• 页码：9528-9530
• 全文大小：175K
• 年卷期：v.132,no.28(July 21, 2010)
• ISSN：1520-5126

文摘

Water-soluble mercaptoacetic acid-coated 3.1 nm CdS quantum dots (QDs) with two concentrations were selected for studying the correlation between the photoluminescence and the crystal growth mechanism. By achieving the classic Ostwald ripening mechanism and oriented attachment (OA) growth mechanism, we have shown that the evolution of the emission spectra were obviously different. The change in both the surface and internal defects during OA crystal growth were responsible for the specific variation of the photoluminescence of CdS QDs. Strategies for obtaining QDs with different luminescent properties are suggested.