Molecules, Vol. 23, Pages 3294: Thermal Transport of Graphene Sheets with Fractal Defects

Molecules, Vol. 23, Pages 3294: Thermal Transport of Graphene Sheets with Fractal Defects
Molecules doi: 10.3390/molecules23123294
Authors:
Yang Kang
Fuyan Duan
Shaoxin Shangguan
Yixin Zhang
Tianpei Zhou
Bingcheng Si

Graphene combined with fractal structures would probably be a promising candidate design of an antenna for a wireless communication system. However, the thermal transport properties of fractal graphene, which would influence the properties of wireless communication systems, are unclear. In this paper, the thermal transport properties of graphene with a Sierpinski fractal structure were investigated via the reverse non-equilibrium molecular dynamics simulation method. Simulation results indicated that the thermal conductivity of graphene with fractal defects decreased from 157.62 to 19.60 (W m−1 K−1) as the fractal level increased. Furthermore, visual display and statistical results of fractal graphene atomic heat flux revealed that with fractal levels increasing, the real heat flux paths twisted, and the angle distributions of atomic heat flux vectors enlarged from about (−30°, 30°) to about (−45°, 45°). In fact, the fractal structures decreased the real heat flow areas and extended the real heat flux paths, and enhanced the phonon scattering in the defect edges of the fractal graphene. Analyses of fractal graphene thermal transport characters...

Source: Molecules - December 12, 2018 Category: Chemistry Authors: Yang Kang Fuyan Duan Shaoxin Shangguan Yixin Zhang Tianpei Zhou Bingcheng Si Tags: Article Source Type: research