Enhancing thermal rectification in graphene-carbon nanotube junctions by tuning the chirality of pillar. (21st September 2018)

• Record Type: Journal Article
• Authors: Yang, Xueming; Wu, Sihan; Xu, Jiangxin; Yu, Dapeng; Cao, Bingyang
• Is Part Of: Europhysics letters. Volume 123:Number 4(2018:Aug.)
• Publication Date: 2018-09-21
• Subjects: 44.10.+i -- 65.80.-g -- 63.22.-m; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/123/44004
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: 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 GN-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 300 K and 200 K, 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.