Strong correlation between surface stress and mechanical strain in Cu, Ag and Au

被引：5

作者：

Duc Tam Ho ^{[1
,3
,4
]}

Park, Soon-Dong ^{[1
,3
,4
]}

Lee, Haengsoo ^{[2
]}

Kwon, Soon-Yong ^{[1
,3
,4
]}

Kim, Sung Youb ^{[1
,3
,4
]}

机构：

[1] Ulsan Natl Inst Sci & Technol, Sch Mech & Adv Mat Engn, Ulsan 689798, South Korea

[2] Ulsan Coll, Dept Mech Engn, Ulsan 680749, South Korea

[3] Ulsan Natl Inst Sci & Technol, Multiscale & Multiphys Simulat Grp, Ulsan 689798, South Korea

[4] Ulsan Natl Inst Sci & Technol, Low Dimens Carbon Mat Ctr, Ulsan 689798, South Korea

来源：

EPL | 2014年 / 106卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

FCC METALS; NANOWIRES; TRANSITION; ALLOYS;

D O I：

10.1209/0295-5075/106/36001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The surface stress, in addition to the surface energy and elastic modulus, is a fundamental measure of the surface effects in a nanostructure. Here, we investigate the strong correlation between the surface stress and mechanical strain in three noble-metal (001) surfaces. For this investigation, we have developed a simple and efficient method to calculate the surface stress directly from the strained configurations in molecular statics simulations. While the surface stress of the copper (001) surface along the strained direction is almost constant, that of the gold (001) surface decreases drastically as the strain increases. We explain these different responses of the surface stress to strain in terms of the different surface relaxation occurring in different noble-metal nanoplates. Copyright (C) EPLA, 2014

引用

页数：6

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