Transfer of Hydrophobic CdSe/CdS Core/Shell Quantum Dots from Organic to Aqueous Phase by Poly(vinylamine)

• Main Authors: Yen-Ting Li, 李彥廷
• Other Authors: Sheng-Shu Hou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/87986658401617149327

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 97 === In this work, we have synthesized the CdSe/CdS core shell quantum dots（QDs）in organic phase using TOPO as a capping agent. The CdSe/CdS NCs were then transferred to the aqueous phase using poly(vinylamine)（PVAm）as the stabilizer. Through the transfer procedure, QDs prepared from TOPO can retain their high quantum yield in water. The parameters that affect the photoluminescent properties such as the –NH2 amount and pH and ionic strength of the solutions have been systematically investigated. The stability of QDs is most important for application of QDs in the aqueous. We also make an experiment of etching of QDs by 80 �aC in dark surrounding to observe the effect of QDs for different parameters.