Enhancing thermal rectification in graphene-carbon nanotube junctions by tuning the chirality of pillar
XM Yang and SH Wu and JX Xu and DP Yu and BY Cao, EPL, 123, 44004 (2018).
This letter investigates thermal rectification (TR) in graphene-carbon nanotube (GN-CNT) junctions formed by SWCNT(12, 12) connected with a single-layer graphene nanosheet (GN-SWCNT(12,12)). It is found that the TR ratio of CN-SWCNT junction can be enhanced dramatically by tuning the chirality of the pillar. TR ratio of the GN-SWCNT(12,12) junction can respectively reach up to 1487% and 2586.4% at temperatures of 300K and 200K (vertical bar Delta vertical bar = 0.5), much higher than those previously reported for the pillared graphene and GN-CNT junctions. The influences of the geometric parameters on the thermal rectification are discussed. The results could offer useful guidelines to the design and performance improvement of the GN-CNT-based thermal rectifier. Copyright (C) EPLA, 2018
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