4.8 Article

Pseudo-Elasticity and Variable Electro-Conductivity Mediated by Size-Dependent Deformation Twinning in Molybdenum Nanocrystals

期刊

SMALL
卷 19, 期 21, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202206380

关键词

body-centered cubic; electro-conductivity; in situ transmission electron microscopy; nanoscale; pseudo-elasticity; reversible twinning

向作者/读者索取更多资源

Through atomistic electron microscopy observations, the size-dependent twinning mechanisms in refractory body-centered cubic molybdenum nanocrystals under tensile loading are revealed. Two distinct twinning mechanisms involving the nucleation of coherent and inclined twin boundaries are uncovered in nanocrystals with smaller and larger diameters, respectively. The effects of different types of twin boundaries on electrical conductivity are quantified, providing valuable insights for the design of next-generation flexible nanoelectronics.
Deformation twinning merits attention because of its intrinsic importance as a mode of energy dissipation in solids. Herein, through the atomistic electron microscopy observations, the size-dependent twinning mechanisms in refractory body-centered cubic molybdenum nanocrystals (NCs) under tensile loading are shown. Two distinct twinning mechanisms involving the nucleation of coherent and inclined twin boundaries (TBs) are uncovered in NCs with smaller (diameter < approximate to 5 nm) and larger (diameter > approximate to 5 nm) diameters, respectively. Interestingly, the ultrahigh pseudo-elastic strain of approximate to 41% in sub-5 nm-sized crystals is achieved through the reversible twinning mechanism. A typical TB cross-transition mechanism is found to accommodate the NC re-orientation during the pseudo-elastic deformation. More importantly, the effects of different types of TBs on the electrical conductivity based on the repeatable experimental measurements and first-principles calculations are quantified. These size-dependent mechanical and electrical properties may prove essential in advancing the design of next-generation flexible nanoelectronics.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据