[Study of water-sol core-shell CdSe/CdS quantum dots].
Water-sol core/shell CdSe/CdS quantum dots (QDs) were synthesized in aqueous solution by using mercapto-acetate acid as stabilizer. The UV-Vis absorption and emission spectra were studied. The size of the SdSe-core was about 2 nm estimated by absorption edge and X-ray powder diffraction(XRD). The structure was also characterized by X-ray photoelectron spectroscopy(XPS). The intensity of luminescence of the quantum dots was greatly enhanced after the surface was modified with CdS shell. Red shift of the peak was shown in both the emission and absorption spectra.
Teng
Feng
F
Institute of Optoelectronic Technology and Laboratory of Information Storage, Display and Materials, Beijing Jiaotong University, Beijing 100044, China.
Tang
Ai-Wei
AW
Gao
Yin-Hao
YH
Liang
Chun-Jun
CJ
Xu
Zheng
Z
Wang
Yong-Sheng
YS
D000465:Algorithms; D019187:Cadmium Compounds / Q000737:chemistry*; D008956:Models, Chemical; D056951:Photoelectron Spectroscopy; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D012995:Solubility; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry*; D013864:Thioglycolates / Q000737:chemistry; D014867:Water / Q000737:chemistry*
D019187:Cadmium Compounds; D018036:Selenium Compounds; D013440:Sulfides; D013864:Thioglycolates; C034939:cadmium sulfide; D014867:Water; C017487:2-mercaptoacetate; C058667:cadmium selenide