Optimized Synthesis and Fluorescence Spectrum Analysis of CdSe Quantum Dots |
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| Authors: | Wanbang Xu Sheng Liang Ronghui Xu Guoxin Zhang Fenghua Xu |
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| Institution: | 1. Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai, P. R. China;2. Graduate School , Chinese Academy of Sciences , Beijing, P. R. China;3. Product and Quality Supervision and Testing Institute, Yueyang Bureau of Quality and Technical Supervision , Hunan, P.R. China;4. Graduate School , Chinese Academy of Sciences , Beijing, P. R. China;5. Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai, P. R. China |
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| Abstract: | An optimized synthesis route was applied for controlling the preparation of CdSe quantum dots (QDs) in an aqueous solution. Some key factors which influencing the properties of CdSe QDs, such as initial pH, stabilizers, ratio of precursor, etc. were investigated. The size, shape, crystal structure, and optical property of CdSe QDs were also characterized by TEM, XRD, UV-Vis, and fluorescence (FL) spectra. The result showed that high-quality cubic CdSe QDs with 3 nm were obtained. The experiments also confirmed that thioglycolic acid (TGA), under the conditions of weak acid, is a better stabilizer than others. The ratio of Cd2+] to SeSO3 2?] played an important role in the formation of CdSe QDs. The mechanisms about the influence factors were also presented. |
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| Keywords: | CdSe QDs influence factors optimized synthesis |
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