Superheating of nanocrystals embedded in matrix

被引：79

作者：

Jiang, Q ^{[1
]}

Zhang, Z ^{[1
]}

Li, JC ^{[1
]}

机构：

[1] Jilin Univ Technol, Dept Mat Sci & Engn, Changchun 130025, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 322卷 / 06期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/S0009-2614(00)00413-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In terms of a model for size-dependent melting and the Lindemann criterion, a model to interpret superheating of nanocrystals embedded in a matrix has been developed. When a ratio, alpha, between the mean square displacement of the surface atoms and that of interior ones for the nanocrystals, is smaller than 1, superheating arises when the nanocrystals have coherent or semi-coherent interfaces with the matrix which has a higher melting temperature than the nanocrystals. Moreover, the atomic diameter of the matrix should be smaller than that of the nanocrystals. The model prediction shows good agreement with the experimental evidence. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：549 / 552

页数：4