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Open AccessArticle

Anomalous Thermal Response of Graphene Kirigami Induced by Tailored Shape to Uniaxial Tensile Strain: A Molecular Dynamics Study

by Hui Li 1, Gao Cheng 1,*, Yongjian Liu 1,* and Dan Zhong 2,*
1
School of Highway, Chang’an University, Xi’an 710064, China
2
Zhuhai Da Hengqin Science and Technology Development Co. Ltd., Zhuhai 519000, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(1), 126; https://doi.org/10.3390/nano10010126
Received: 3 December 2019 / Revised: 29 December 2019 / Accepted: 31 December 2019 / Published: 9 January 2020
(This article belongs to the Special Issue Characterization, Synthesis and Applications of 2D Nanomaterials)
The mechanical and thermal properties of graphene kirigami are strongly dependent on the tailoring structures. Here, thermal conductivity of three typical graphene kirigami structures, including square kirigami graphene, reentrant hexagonal honeycomb structure, and quadrilateral star structure under uniaxial strain are explored using molecular dynamics simulations. We find that the structural deformation of graphene kirigami is sensitive to its tailoring geometry. It influences thermal conductivity of graphene by changing heat flux scattering, heat path, and cross-section area. It is found that the factor of cross-section area can lead to four times difference of thermal conductivity in the large deformation system. Our results are elucidated based on analysis of micro-heat flux, geometry deformation, and atomic lattice deformation. These insights enable us to design of more efficient thermal management devices with elaborated graphene kirigami materials. View Full-Text
Keywords: graphene kirigami; mechanical properties; thermal conductivity; molecular dynamics graphene kirigami; mechanical properties; thermal conductivity; molecular dynamics
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MDPI and ACS Style

Li, H.; Cheng, G.; Liu, Y.; Zhong, D. Anomalous Thermal Response of Graphene Kirigami Induced by Tailored Shape to Uniaxial Tensile Strain: A Molecular Dynamics Study. Nanomaterials 2020, 10, 126.

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