Strain engineering for thermal conductivity of diamond nanothread forests

Thermal properties of the diamond nanothread (DNT) forest array are studied using non-equilibrium molecular dynamics simulations. We find a strong anisotropic thermal property in this structure, i.e. the thermal conductivity in thread direction is over 300 times of that in the perpendicular directio...

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Bibliographic Details
Published inJournal of physics. D, Applied physics Vol. 52; no. 8; pp. 85301 - 85308
Main Authors Xue, Yixuan, Chen, Yang, Li, Zhen, Jiang, Jin-Wu, Zhang, Yingyan, Wei, Ning
Format Journal Article
LanguageEnglish
Published IOP Publishing 20.02.2019
Subjects
anisotropy
diamond nanothread
molecular dynamics
thermal conductivity
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ISSN0022-3727
1361-6463
DOI10.1088/1361-6463/aaf559

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Summary:Thermal properties of the diamond nanothread (DNT) forest array are studied using non-equilibrium molecular dynamics simulations. We find a strong anisotropic thermal property in this structure, i.e. the thermal conductivity in thread direction is over 300 times of that in the perpendicular direction. When subject to external strain, the thermal conductivity of the DNT forest decreases with increasing compressive/tensile strain in the thread direction, while thermal conductivity increases exponentially with increasing compressive strain in the perpendicular direction. The increase in thermal conductivity is attributed to the enhanced interactions among DNTs induced by compression. These results are explained by phonon spectra and structural deformation. Our findings show that diamond nanothread forest has a great potential application in the super-capacitors.
Bibliography:JPhysD-118216.R2
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aaf559