Theoretical study of heat transfer across biphenylene/h-BN superlattice nanoribbons

Maryam Zarghami Dehaghani, Omid Farzadian, Konstantinos V. Kostas, Fatemeh Molaei, Christos Spitas, Amin Hamed Mashhadzadeh

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number115411
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume144
DOIs
Publication statusPublished - Oct 2022

Keywords

  • Biphenylene
  • Boron-nitride
  • Heat transfer
  • Nanoribbon
  • Superlattice
  • Thermal conductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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