氧化铈纳米棒中的弹性变形通过萤石到金红石的相变。
Elastic deformation in ceria nanorods via a fluorite-to-rutile phase transition.
机构信息
Cranfield University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK.
出版信息
ACS Nano. 2010 Feb 23;4(2):879-86. doi: 10.1021/nn901612s.
PMID:20141159
Abstract
Atomistic simulations reveal that ceria nanorods, under uniaxial tension, can accommodate over 6% elastic deformation. Moreover, a reversible fluorite-to-rutile phase change occurs above 6% strain for a ceria nanorod that extends along [110]. We also observe that during unloading the stress increases with decreasing strain as the rutile reverts back to fluorite. Ceria nanorods may find possible application as vehicles for elastic energy storage.
摘要
原子模拟揭示，二氧化铈纳米棒在单向拉伸下可容纳超过 6%的弹性变形。此外，当二氧化铈纳米棒沿[110]方向延伸时，在超过 6%的应变量下会发生可逆的萤石相向金红石相的转变。我们还观察到，在卸载过程中，随着金红石相回复到萤石相，应力随应变的减小而增加。二氧化铈纳米棒可能作为弹性储能的载体得到应用。
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