title: Kinetic analysis for formation of Cd1-xZnxSe solid-solution nanocrystals.
abstract: Kinetic analysis on the nanocrystal solid-solution formation was performed by heat treating CdSe/ZnSe core/shell nanocrystals, synthesized via a typical TOP/TOPO approach, at different temperatures for different time periods. X-ray diffraction (XRD) peak shifts in Cd1-xZnxSe cores according to the solid-solution treatments were monitored and used for the estimation of the lattice parameter change. The degree of solid-solution formation was determined considering the compositional variation in Cd1-xZnxSe cores, which was obtained from the Vegard's law. The degree of solid-solution formation (x) was applied to Jander analysis, and an Arrhenius-type plot was produced using the slopes of Jander plots. The activation energy for solid-solution formation was determined as approximately 152 kJ/mol, which evidently indicates that the diffusion of Zn2+ ions in the CdSe-ZnSe system is the governing mechanism for the Cd1-xZnxSe solid-solution formation. The Jander equation to predict the solid-solution formation kinetics for the CdSe/ZnSe core/shell systems was completed using the reaction rate constant (k).
authors.affiliation: Department of Materials Science & Engineering, Korea University, Seoul, Korea 136-713.
authors.forename: Yun-Mo
authors.initials: YM
authors.lastname: Sung
authors.forename: Yong-Ji
authors.initials: YJ
authors.lastname: Lee
authors.forename: Kyung-Soo
authors.initials: KS
authors.lastname: Park