Discrete periodic melting point observations for nanostructure ensembles

被引：107

作者：

Efremov, MY

Schiettekatte, F

Zhang, M

Olson, EA

Kwan, AT

Berry, RS

Allen, LH

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Coordinated Sci Lab, Urbana, IL 61801 USA

[3] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.85.3560

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a study of the thermodynamic properties of indium clusters on a SiNx surface during the early stages of thin film growth using a sensitive nanocalorimetry technique. The measurements reveal the presence of abnormal discontinuities in the heat of melting below 100 degreesC, These discontinuities, for which temperature separation corresponds to a spatial periodicity equal to the thickness of an indium monolayer, are found to be related to the atomic "magic numbers," i.e., the number of atoms necessary to form a complete shell of atoms at particle surface.

引用

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页码：3560 / 3563

页数：4

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