Theoretical study of heat transfer across biphenylene/h-BN superlattice nanoribbons
Zarghami Dehaghani M. Farzadian O. Kostas K.V. Molaei F. Spitas C. Hamed Mashhadzadeh A.
October 2022Elsevier B.V.
Physica E: Low-Dimensional Systems and Nanostructures
2022#144
Controlling thermal conductivity of nanostructures is a key element in manufacturing tailor-made nanodevices for thermoelectric applications. Moreover, superlattice nanostructures have been demonstrated to be useful in achieving minimal thermal conductivity for the employed nanomaterials. In this work, we model two-dimensional biphenylene, a recently-synthesized sp2-hybridized allotrope of carbon atoms, for the implementation of a biphenylene/hexagonal Boron-Nitride (biphenylene/h-BN) superlattice nanoribbons. The effects of the length of ribbon and its superlattice period (lp) on the thermal conductivity are explored using molecular dynamics simulations. We calculated the length-independent intrinsic thermal conductivity (Kα) of the superlattice nanostructure, which was approximately 68% and 55% lower than the thermal conductivity of pristine h-BN and biphenylene nanosheets, respectively. The superlattice period largely determines the minimum thermal conductivity, which was at 64.1 W m−1k−1 for a period value of lp = 2.51 nm. This work opens a new window to tune and/or minimize thermal conductivity in nanoribbons when designing thermoelectric and thermal insulation materials for favorable applications.
Biphenylene , Boron-nitride , Heat transfer , Nanoribbon , Superlattice , Thermal conductivity
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Mechanical and Aerospace Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Mining and Geological Engineering Department, The University of Arizona, AZ, United States
Mechanical and Aerospace Engineering
Mining and Geological Engineering Department
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