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Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires

R.J. Wang, C.Y. Wang, Y.T. Feng, Yuntian Feng Orcid Logo, Chengyuan Wang Orcid Logo

International Journal of Mechanical Sciences, Volume: 130, Pages: 267 - 273

Swansea University Authors: Yuntian Feng Orcid Logo, Chengyuan Wang Orcid Logo

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DOI (Published version): 10.1016/j.ijmecsci.2017.06.026

Abstract

This paper aims to identify a well-defined effective diameter of Nanowires (NWs) in evaluating their Young's modulus and to investigate the physical mechanisms behind the achieved surface elasticity. To this end, GaN NWs were considered for which a layer-wise model was developed and the tensile...

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Published in: International Journal of Mechanical Sciences
ISSN: 00207403
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34386
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spelling 2020-05-28T14:03:26.8942950 v2 34386 2017-06-20 Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires d66794f9c1357969a5badf654f960275 0000-0002-6396-8698 Yuntian Feng Yuntian Feng true false fdea93ab99f51d0b3921d3601876c1e5 0000-0002-1001-2537 Chengyuan Wang Chengyuan Wang true false 2017-06-20 CIVL This paper aims to identify a well-defined effective diameter of Nanowires (NWs) in evaluating their Young's modulus and to investigate the physical mechanisms behind the achieved surface elasticity. To this end, GaN NWs were considered for which a layer-wise model was developed and the tensile tests were performed based on molecular statics simulations (MSS). It was shown that two previously defined effective diameters result in an opposing effect of the surface elasticity and reversed size-dependence of the overall Young's modulus. Subsequently, a proper effective diameter was decided for the NWs, which enables one to correctly interpret atomistic simulations in terms of continuum mechanics concepts. In particular, clear evidence was attained showing that the bond loss on the NW surface results in around 43% surface softening relative to the NW interior and bulk material. Journal Article International Journal of Mechanical Sciences 130 267 273 00207403 GaN Nanowires; Surface elasticity; Size-dependence; Bond-loss effect; Effective size 31 12 2017 2017-12-31 10.1016/j.ijmecsci.2017.06.026 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2020-05-28T14:03:26.8942950 2017-06-20T12:20:35.0964352 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering R.J. Wang 1 C.Y. Wang 2 Y.T. Feng 3 Yuntian Feng 0000-0002-6396-8698 4 Chengyuan Wang 0000-0002-1001-2537 5 0034386-20062017144221.pdf wang2017(5).pdf 2017-06-20T14:42:21.2800000 Output 1185630 application/pdf Accepted Manuscript true 2018-06-17T00:00:00.0000000 true eng
title Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
spellingShingle Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
Yuntian Feng
Chengyuan Wang
title_short Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
title_full Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
title_fullStr Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
title_full_unstemmed Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
title_sort Effective geometric size and bond-loss effect in nanoelasticity of GaN nanowires
author_id_str_mv d66794f9c1357969a5badf654f960275
fdea93ab99f51d0b3921d3601876c1e5
author_id_fullname_str_mv d66794f9c1357969a5badf654f960275_***_Yuntian Feng
fdea93ab99f51d0b3921d3601876c1e5_***_Chengyuan Wang
author Yuntian Feng
Chengyuan Wang
author2 R.J. Wang
C.Y. Wang
Y.T. Feng
Yuntian Feng
Chengyuan Wang
format Journal article
container_title International Journal of Mechanical Sciences
container_volume 130
container_start_page 267
publishDate 2017
institution Swansea University
issn 00207403
doi_str_mv 10.1016/j.ijmecsci.2017.06.026
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
active_str 0
description This paper aims to identify a well-defined effective diameter of Nanowires (NWs) in evaluating their Young's modulus and to investigate the physical mechanisms behind the achieved surface elasticity. To this end, GaN NWs were considered for which a layer-wise model was developed and the tensile tests were performed based on molecular statics simulations (MSS). It was shown that two previously defined effective diameters result in an opposing effect of the surface elasticity and reversed size-dependence of the overall Young's modulus. Subsequently, a proper effective diameter was decided for the NWs, which enables one to correctly interpret atomistic simulations in terms of continuum mechanics concepts. In particular, clear evidence was attained showing that the bond loss on the NW surface results in around 43% surface softening relative to the NW interior and bulk material.
published_date 2017-12-31T03:42:39Z
_version_ 1763751975637221376
score 10.998048

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