Temperature dependence of heat conduction coefficient in nanotube/nanowire networks

doi:10.1088/1674-1056/26/9/098904

中国物理B ›› 2017, Vol. 26 ›› Issue (9): 98904-098904.doi: 10.1088/1674-1056/26/9/098904

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Temperature dependence of heat conduction coefficient in nanotube/nanowire networks

Kezhao Xiong(熊科诏), Zonghua Liu(刘宗华)

Department of Physics, East China Normal University, Shanghai 200062, China

收稿日期:2017-03-22 修回日期:2017-06-04 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: Zonghua Liu E-mail:zhliu@phy.ecnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11135001 and 11375066) and the National Basic Research Program of China (Grant No. 2013CB834100).

Temperature dependence of heat conduction coefficient in nanotube/nanowire networks

Kezhao Xiong(熊科诏), Zonghua Liu(刘宗华)

Department of Physics, East China Normal University, Shanghai 200062, China

Received:2017-03-22 Revised:2017-06-04 Online:2017-09-05 Published:2017-09-05
Contact: Zonghua Liu E-mail:zhliu@phy.ecnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11135001 and 11375066) and the National Basic Research Program of China (Grant No. 2013CB834100).

摘要/Abstract

摘要： Studies on heat conduction are so far mainly focused on regular systems such as the one-dimensional (1D) and two-dimensional (2D) lattices where atoms are regularly connected and temperatures of atoms are homogeneously distributed. However, realistic systems such as the nanotube/nanowire networks are not regular but heterogeneously structured, and their heat conduction remains largely unknown. We present a model of quasi-physical networks to study heat conduction in such physical networks and focus on how the network structure influences the heat conduction coefficient κ. In this model, we for the first time consider each link as a 1D chain of atoms instead of a spring in the previous studies. We find that κ is different from link to link in the network, in contrast to the same constant in a regular 1D or 2D lattice. Moreover, for each specific link, we present a formula to show how κ depends on both its link length and the temperatures on its two ends. These findings show that the heat conduction in physical networks is not a straightforward extension of 1D and 2D lattices but seriously influenced by the network structure.

关键词: heat conduction, nanotube/nanowire, complex network, one-dimensional (1D) lattice

Abstract: Studies on heat conduction are so far mainly focused on regular systems such as the one-dimensional (1D) and two-dimensional (2D) lattices where atoms are regularly connected and temperatures of atoms are homogeneously distributed. However, realistic systems such as the nanotube/nanowire networks are not regular but heterogeneously structured, and their heat conduction remains largely unknown. We present a model of quasi-physical networks to study heat conduction in such physical networks and focus on how the network structure influences the heat conduction coefficient κ. In this model, we for the first time consider each link as a 1D chain of atoms instead of a spring in the previous studies. We find that κ is different from link to link in the network, in contrast to the same constant in a regular 1D or 2D lattice. Moreover, for each specific link, we present a formula to show how κ depends on both its link length and the temperatures on its two ends. These findings show that the heat conduction in physical networks is not a straightforward extension of 1D and 2D lattices but seriously influenced by the network structure.

Key words: heat conduction, nanotube/nanowire, complex network, one-dimensional (1D) lattice

中图分类号: (Complex systems)

89.75.-k

44.10.+i (Heat conduction) 05.45.-a (Nonlinear dynamics and chaos)

熊科诏, 刘宗华. Temperature dependence of heat conduction coefficient in nanotube/nanowire networks[J]. 中国物理B, 2017, 26(9): 98904-098904.

Kezhao Xiong(熊科诏), Zonghua Liu(刘宗华). Temperature dependence of heat conduction coefficient in nanotube/nanowire networks[J]. Chin. Phys. B, 2017, 26(9): 98904-098904.

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Temperature dependence of heat conduction coefficient in nanotube/nanowire networks

Temperature dependence of heat conduction coefficient in nanotube/nanowire networks

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