Size-dependent formation enthalpy of nanocompounds

被引：35

作者：

Liang, LH ^{[1
]}

Yang, GW

Li, BW

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[2] Zhongshan Univ, Sch Phys Sci & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

[3] NUS, Grad Sch Integrated Sci & Engn, Singapore 1175497, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 33期

关键词：

D O I：

10.1021/jp0528461

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：

A quantitative thermodynamic model for the size-dependent formation enthalpy of nanocompounds is proposed. The model reveals that the thermal stability of nanocompounds decreases because of the size dependence of formation enthalpy when the size of these nanostructures decreases. This stability loss is related to some general phenomena such as interface alloying of immiscible systems and phase segregation of miscible systems with reducing system sizes. The predictions from the model are in agreement with the results from density function theory calculation for MgH2, the experimental measurement of SnTe nanoparticles, and quantum chemistry consideration.

引用

页码：16081 / 16083

页数：3

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