Coarsening kinetics of Mn-doped CdSe nanocrystals

Yun Mo Sung; Woo Chul Kwak; Tae Geun Kim

doi:10.1021/cg0705005

Coarsening kinetics of Mn-doped CdSe nanocrystals

Yun Mo Sung, Woo Chul Kwak, Tae Geun Kim

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV-visible light absorption peaks, and their size variation was estimated using the quantum confinement theory. The size values were used for the Lifshitz-Slyozov-Wagner (LSW) analyses for the coarsening kinetics. By determining the activation energy (Q) and reaction rate constant (K_o), the coarsening mechanism was identified as surface diffusion of atoms, and the kinetics equation could be completed for both nanocrystals. The Mn-doped CdSe nanocrystals showed faster coarsening kinetics due to the low activation energy barrier for the diffusion.

Original language	English
Pages (from-to)	1186-1190
Number of pages	5
Journal	Crystal Growth and Design
Volume	8
Issue number	4
DOIs	https://doi.org/10.1021/cg0705005
Publication status	Published - 2008 Apr

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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title = "Coarsening kinetics of Mn-doped CdSe nanocrystals",

abstract = "CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV-visible light absorption peaks, and their size variation was estimated using the quantum confinement theory. The size values were used for the Lifshitz-Slyozov-Wagner (LSW) analyses for the coarsening kinetics. By determining the activation energy (Q) and reaction rate constant (Ko), the coarsening mechanism was identified as surface diffusion of atoms, and the kinetics equation could be completed for both nanocrystals. The Mn-doped CdSe nanocrystals showed faster coarsening kinetics due to the low activation energy barrier for the diffusion.",

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AU - Sung, Yun Mo

AU - Kwak, Woo Chul

AU - Kim, Tae Geun

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N2 - CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV-visible light absorption peaks, and their size variation was estimated using the quantum confinement theory. The size values were used for the Lifshitz-Slyozov-Wagner (LSW) analyses for the coarsening kinetics. By determining the activation energy (Q) and reaction rate constant (Ko), the coarsening mechanism was identified as surface diffusion of atoms, and the kinetics equation could be completed for both nanocrystals. The Mn-doped CdSe nanocrystals showed faster coarsening kinetics due to the low activation energy barrier for the diffusion.

AB - CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV-visible light absorption peaks, and their size variation was estimated using the quantum confinement theory. The size values were used for the Lifshitz-Slyozov-Wagner (LSW) analyses for the coarsening kinetics. By determining the activation energy (Q) and reaction rate constant (Ko), the coarsening mechanism was identified as surface diffusion of atoms, and the kinetics equation could be completed for both nanocrystals. The Mn-doped CdSe nanocrystals showed faster coarsening kinetics due to the low activation energy barrier for the diffusion.

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Coarsening kinetics of Mn-doped CdSe nanocrystals

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