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Size-dependent pyroelectric properties of gallium nitride nanowires

Jin Zhang, Chengyuan Wang Orcid Logo

Journal of Applied Physics, Volume: 119, Issue: 14, Start page: 145102

Swansea University Author: Chengyuan Wang Orcid Logo

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DOI (Published version): 10.1063/1.4945765

Abstract

The size scale effect on the pyroelectric properties is studied for gallium nitride (GaN) nanowires (NWs) based on molecular dynamics simulations and the theoretical analysis. Significant influence of the surface thermoelasticity and piezoelectricity is achieved leading to the pyroelectric coefficie...

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Published in: Journal of Applied Physics
ISSN: 0021-8979 1089-7550
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa28836
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first_indexed 2016-06-12T18:23:06Z
last_indexed 2020-08-08T02:46:42Z
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spelling 2020-08-07T11:45:50.3813404 v2 28836 2016-06-12 Size-dependent pyroelectric properties of gallium nitride nanowires fdea93ab99f51d0b3921d3601876c1e5 0000-0002-1001-2537 Chengyuan Wang Chengyuan Wang true false 2016-06-12 MECH The size scale effect on the pyroelectric properties is studied for gallium nitride (GaN) nanowires (NWs) based on molecular dynamics simulations and the theoretical analysis. Significant influence of the surface thermoelasticity and piezoelectricity is achieved leading to the pyroelectric coefficient of the NWs varying with the cross-sectional size. The pyroelectric potential is also calculated for GaN NWs subjected to heating. The results show that the size scale effect may raise the pyroelectric potential of thin NWs (cross sectional size in nanometers) by over 10 times. Such strong size scale effect on NWs is found to be the resultant effect of nanoscale thermoelasticity, piezoelectricity and dielectricity, and decrease with increasing cross-section of GaN NWs. It is expected that the present study may have strong implication in the field of energy harvesting at the nanoscale, as pyro-electricity offers a new avenue to the design of novel nanogenerators. Journal Article Journal of Applied Physics 119 14 145102 0021-8979 1089-7550 31 12 2016 2016-12-31 10.1063/1.4945765 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2020-08-07T11:45:50.3813404 2016-06-12T12:51:13.9439818 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Jin Zhang 1 Chengyuan Wang 0000-0002-1001-2537 2
title Size-dependent pyroelectric properties of gallium nitride nanowires
spellingShingle Size-dependent pyroelectric properties of gallium nitride nanowires
Chengyuan Wang
title_short Size-dependent pyroelectric properties of gallium nitride nanowires
title_full Size-dependent pyroelectric properties of gallium nitride nanowires
title_fullStr Size-dependent pyroelectric properties of gallium nitride nanowires
title_full_unstemmed Size-dependent pyroelectric properties of gallium nitride nanowires
title_sort Size-dependent pyroelectric properties of gallium nitride nanowires
author_id_str_mv fdea93ab99f51d0b3921d3601876c1e5
author_id_fullname_str_mv fdea93ab99f51d0b3921d3601876c1e5_***_Chengyuan Wang
author Chengyuan Wang
author2 Jin Zhang
Chengyuan Wang
format Journal article
container_title Journal of Applied Physics
container_volume 119
container_issue 14
container_start_page 145102
publishDate 2016
institution Swansea University
issn 0021-8979
1089-7550
doi_str_mv 10.1063/1.4945765
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 - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 0
active_str 0
description The size scale effect on the pyroelectric properties is studied for gallium nitride (GaN) nanowires (NWs) based on molecular dynamics simulations and the theoretical analysis. Significant influence of the surface thermoelasticity and piezoelectricity is achieved leading to the pyroelectric coefficient of the NWs varying with the cross-sectional size. The pyroelectric potential is also calculated for GaN NWs subjected to heating. The results show that the size scale effect may raise the pyroelectric potential of thin NWs (cross sectional size in nanometers) by over 10 times. Such strong size scale effect on NWs is found to be the resultant effect of nanoscale thermoelasticity, piezoelectricity and dielectricity, and decrease with increasing cross-section of GaN NWs. It is expected that the present study may have strong implication in the field of energy harvesting at the nanoscale, as pyro-electricity offers a new avenue to the design of novel nanogenerators.
published_date 2016-12-31T03:35:12Z
_version_ 1763751506473910272
score 11.012678

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