Stability of Nanocrystals in 2D and 3D Systems in Ostwald Ripening

被引：0
|
作者：
R. D. Vengrenovych
B. V. Ivanskyy
I. I. Panko
M. O. Stasyk
I. V. Fesiv
机构：
[1] Yuriy Fedkovych Chernivtsi National University,
来源：
Powder Metallurgy and Metal Ceramics | 2015年 / 54卷
关键词：
nanocrystals; nanoparticles; nanoclusters; nanosystems; growth mechanism; size distribution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The Chakraverty–Wagner distribution and generalized Lifshitz–Slyozov–Wagner distribution are compared within the LSW theory modified for the surface (2D system) and for the volume (3D system) with experimental histograms for nanocrystals (quantum dots) obtained by different techniques: electron-beam (molecular beam) epitaxy, liquid-phase epitaxy, and colloidal chemistry. Matching of the experimental histograms with theoretically plotted curves indicates the nanocrystals can grow (dissolve) in Ostwald ripening by two mechanisms simultaneously—diffusion and chemical reaction—which are controlled, respectively, by diffusion coefficient Ds (Dv) and kinetic coefficient β. The results of studies on the mechanisms whereby nanocrystals grow by Ostwald ripening may be used in processes of their synthesis.
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页码：281 / 291
页数：10
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