中国物理B ›› 2017, Vol. 26 ›› Issue (10): 106502-106502.doi: 10.1088/1674-1056/26/10/106502

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Thermal conductivity of carbon nanoring linked graphene sheets:A molecular dynamics investigation

Gang Shi(石刚), Jianwei Zhang(张鉴炜), Yonglv He(贺雍律), Su Ju(鞠苏), Dazhi Jiang(江大志)   

  1. Department of Materials Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2017-06-22 修回日期:2017-07-20 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Jianwei Zhang, Dazhi Jiang E-mail:jwzhang.nudt@gmail.com;jiangdz@nudt.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11202231) and the Research Project of National University of Defense Technology (Grant No. JC15-01-03).

Thermal conductivity of carbon nanoring linked graphene sheets:A molecular dynamics investigation

Gang Shi(石刚), Jianwei Zhang(张鉴炜), Yonglv He(贺雍律), Su Ju(鞠苏), Dazhi Jiang(江大志)   

  1. Department of Materials Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2017-06-22 Revised:2017-07-20 Online:2017-10-05 Published:2017-10-05
  • Contact: Jianwei Zhang, Dazhi Jiang E-mail:jwzhang.nudt@gmail.com;jiangdz@nudt.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11202231) and the Research Project of National University of Defense Technology (Grant No. JC15-01-03).

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摘要：

Improving the thermal conduction across graphene sheets is of great importance for their applications in thermal management. In this paper, thermal transport across a hybrid structure formed by two graphene nanoribbons and carbon nanorings (CNRs) was investigated by molecular dynamics simulations. The effects of linker diameter, number, and height on thermal conductivity of the CNRs-graphene hybrid structures were studied respectively, and the CNRs were found effective in transmitting the phonon modes of GNRs. The hybrid structure with 2 linkers showed the highest thermal conductivity of 68.8 W·m-1·K-1. Our work presents important insight into fundamental principles governing the thermal conduction across CNR junctions and provides useful guideline for designing CNR-graphene structure with superior thermal conductivity.

关键词: carbon nanorins-graphene hybrid structures, thermal conductivity, molecular dynamics simulation

Abstract:

Improving the thermal conduction across graphene sheets is of great importance for their applications in thermal management. In this paper, thermal transport across a hybrid structure formed by two graphene nanoribbons and carbon nanorings (CNRs) was investigated by molecular dynamics simulations. The effects of linker diameter, number, and height on thermal conductivity of the CNRs-graphene hybrid structures were studied respectively, and the CNRs were found effective in transmitting the phonon modes of GNRs. The hybrid structure with 2 linkers showed the highest thermal conductivity of 68.8 W·m-1·K-1. Our work presents important insight into fundamental principles governing the thermal conduction across CNR junctions and provides useful guideline for designing CNR-graphene structure with superior thermal conductivity.

Key words: carbon nanorins-graphene hybrid structures, thermal conductivity, molecular dynamics simulation

中图分类号:  (Thermal properties of small particles, nanocrystals, nanotubes, and other related systems)

  • 65.80.-g
65.80.Ck (Thermal properties of graphene) 63.22.-m (Phonons or vibrational states in low-dimensional structures and nanoscale materials) 31.15.xv (Molecular dynamics and other numerical methods)