Mechanical stability and thermal properties of the transition junction between carbon nanotubes and graphene nanoribbons

Any nonplanar connection, defect mechanism, or material adaptation at material joints can result in material properties being altered. In this paper, the longitudinal pull of carbon nanotubes (CNT) was taken as the research object, and the method of non-equilibrium molecular dynamics (NEMD) was adopted to study the thermal properties of CNT by changing the magnitude of the longitudinal pull, that is, the opening angle of the transition of CNT to graphene nanoribons (GNR). The results show that the more intense the transition from CNT to GNR, the larger the opening angle of the junction, the higher the local thermal conductivity, and the smaller the thermal resistance per unit length. For CNT with different pipe diameters, the maximum opening angle at the junction remains constant at 16.3°. (authors)