Kinetic analysis for formation of Cd1-xZnxSe solid-solution nanocrystals

Yun Mo Sung, Yong Ji Lee, Kyung Soo Park

Research output: Contribution to journalArticle

69 Citations (Scopus)

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 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).

Original languageEnglish
Pages (from-to)9002-9003
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number28
DOIs
Publication statusPublished - 2006 Jul 19

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Nanoparticles
Nanocrystals
Solid solutions
Kinetics
X-Ray Diffraction
Lattice constants
Reaction rates
Rate constants
Activation energy
Hot Temperature
Ions
X ray diffraction
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Kinetic analysis for formation of Cd1-xZnxSe solid-solution nanocrystals. / Sung, Yun Mo; Lee, Yong Ji; Park, Kyung Soo.

In: Journal of the American Chemical Society, Vol. 128, No. 28, 19.07.2006, p. 9002-9003.

Research output: Contribution to journalArticle

Sung, Yun Mo ; Lee, Yong Ji ; Park, Kyung Soo. / Kinetic analysis for formation of Cd1-xZnxSe solid-solution nanocrystals. In: Journal of the American Chemical Society. 2006 ; Vol. 128, No. 28. pp. 9002-9003.
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