Effect of overlapping junctions on the heat transfer between 2D layered composite materials

摘要

Lateral combination of two-dimensional (2D) layered materials can be employed to design new composite structures with distinctive electronic, optical and thermal properties that may contrast with those of the native layers. In such hybrid structures, junctions and interfacial boundaries play critical roles in their transport properties. In this study, heat transport in overlapped junctions between two half layers (each connected to a different heat bath) is studied using an analytical modeling approach based on the continuum heat conduction equation. Temperature and heat flux profiles within and across layers are calculated concerning the overlapping length. The acquired results confirm that by increasing the overlapping length, the total heat flux passing through the hybrid structure increases and subsequently the temperature jump at the interface decreases. Moreover, the effects of in-plane thermal conductivity, interfacial thermal conductance and material heterogeneity on the thermal transport along the studied composite systems are examined. The provided results can improve the understanding concerning the heat transfer phenomena in the layered 2D composites and improve the design of junction bridges to enhance the thermal management and heat dissipation.