Stability and thermal behavior of molybdenum disulfide nanotubes: Nonequilibrium molecular dynamics simulation using REBO potential
Artikel i vetenskaplig tidskrift, 2017

This study is an attempt to perform equilibrium molecular dynamics and non-equilibrium molecular dynamics (NEMD) to evaluate the stability and thermal behavior of molybdenum disulfide nanotubes (MoS2NTs) by reactive empirical bond order potential. The stability of nanotubes, cohesive energy, isobaric heat capacity, and enthalpies of fusion in armchair and zigzag structures with different radii were calculated. The observed results illustrate that SWMoS2NTs, which have larger diameters, are more stable with more negative energy than the smaller ones. Moreover, it was found that the melting point is increased with an increase in the nanotube's radius. During the melting process, the structural transformation of nanotubes was investigated using a mean-square displacement and radial distribution function diagrams. Afterwards, using a NEMD simulation, the thermal conductivity of nanotubes with various diameters was calculated at a constant nanotube length. The obtained results show that the thermal conductivity coefficient increases with increasing nanotube diameters when the nanotube length is constant.

Författare

Zohreh Ahadi

University of Zanjan

Muhammad Shadman Lakmehsari

University of Zanjan

Sandeep Kumar Singh

Chalmers, Fysik, Material- och ytteori

Jamal Davoodi

University of Zanjan

Journal of Applied Physics

0021-8979 (ISSN) 1089-7550 (eISSN)

Vol. 122 22 224303

Ämneskategorier

Fysik

DOI

10.1063/1.5001383