Novel Mechanical Behavior Of Zno Nanorods
Wang J; Kulkarni AJ; Ke FJ(柯孚久); Bai YL(白以龙); Zhou M
刊名Computer Methods In Applied Mechanics And Engineering
2008
通讯作者邮箱min.zhou@gatech.edu
页码3182-3189
关键词Phase Transformation Zno Nanorods Molecular Dynamics Semiconducting Oxide Nanobelts Surface-Stress Growth Nanowires Size
ISSN号0045-7825
通讯作者Zhou, M (reprint author), Georgia Inst Technol, GWW Sch Mech Engn, Atlanta, GA 30332 USA.
中文摘要A novel stress-strain relation with two stages of linear elastic deformation is observed in [0 0 0 1]-oriented ZnO nanorods under uniaxial tensile loading. This phenomenon results from a phase transformation from wurtzite (WZ, P6(3)mc space group) to a body-centered tetragonal structure with four-atom rings (denoted as BCT-4) belonging to the P4(2)/mnm space group. The analysis here focuses on the effects of nanorod size and temperature on the phase transformation and the associated mechanical behavior. It is found that as size is increased from 19.5 to 45.5 angstrom, the critical stress for nucleation of the transformation decreases by 25% from 21.90 to 16.50 GPa and the elastic moduli of the WZ- and BCT-4-structured nanorods decrease by 24% (from 299.49 to 227.51 GPa) and 38% (from 269.29 to 166.86 GPa), respectively. A significant temperature effect is also observed, with the critical stress for transformation initiation decreasing 87.8% from 17.89 to 2.19 GPa as temperature increases from 300 to 1500 K. (c) 2007 Elsevier B.V. All rights reserved.
类目[WOS]Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics
研究领域[WOS]Engineering ; Mathematics ; Mechanics
关键词[WOS]SEMICONDUCTING OXIDE NANOBELTS ; SURFACE-STRESS ; GROWTH ; NANOWIRES ; SIZE
收录类别SCI ; EI
语种英语
WOS记录号WOS:000258981600003
公开日期2009-08-03 ; 2009-09-14
内容类型期刊论文
源URL[http://dspace.imech.ac.cn/handle/311007/25912]  
专题力学研究所_力学所知识产出(1956-2008)
推荐引用方式
GB/T 7714
Wang J,Kulkarni AJ,Ke FJ,et al. Novel Mechanical Behavior Of Zno Nanorods[J]. Computer Methods In Applied Mechanics And Engineering,2008:3182-3189.
APA Wang J,Kulkarni AJ,柯孚久,白以龙,&Zhou M.(2008).Novel Mechanical Behavior Of Zno Nanorods.Computer Methods In Applied Mechanics And Engineering,3182-3189.
MLA Wang J,et al."Novel Mechanical Behavior Of Zno Nanorods".Computer Methods In Applied Mechanics And Engineering (2008):3182-3189.
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