Oxidation induced softening in Al nanowires

被引：36

作者：

Sen, Fatih G. ^{[1
]}

Qi, Yue ^{[2
]}

van Duin, Adri C. T. ^{[3
]}

Alpas, Ahmet T. ^{[1
]}

机构：

[1] Univ Windsor, Dept Mech Automot & Mat Engn, Engn Mat Program, Windsor, ON N9B 3P4, Canada

[2] Gen Motors Res & Dev Ctr, Chem Sci & Mat Syst Lab, Warren, MI 48090 USA

[3] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

REACTIVE FORCE-FIELD; ELASTIC PROPERTIES; THIN-FILMS; MECHANICAL-BEHAVIOR; MOLECULAR-DYNAMICS; SURFACE RESONANCES; TENSILE PROPERTIES; DEFORMATION; STRENGTH; ALUMINA;

D O I：

10.1063/1.4790181

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The mechanical properties of metallic nanowires depend dramatically on the atmospheric conditions. Molecular-dynamics simulations with ReaxFF were conducted to study tensile elastic deformation of oxidized Al nanowires. The thin amorphous oxide shell formed around Al nanowires had a very low Young's modulus of 26 GPa, due to its low density and low Al-O coordination. Consequently, for diameters less than 100 nm, the composite Young's modulus of oxide-covered Al nanowires showed a size dependence implying that in this case "smaller is softer." The model developed also explained the discrepancies in the reported modulus values of nanometer-scale Al thin films. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790181]

引用

页数：5

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