Interfacial thermal resistance and thermal rectification in carbon nanotube film-copper systems

Nanoscale ◽  
2017 ◽  
Vol 9 (9) ◽  
pp. 3133-3139 ◽  
Author(s):  
Zheng Duan ◽  
Danyang Liu ◽  
Guang Zhang ◽  
Qingwei Li ◽  
Changhong Liu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Thermal Resistance ◽  
Interfacial Thermal Resistance ◽  
Thermal Rectification ◽  
Carbon Nanotube Film

scholarly journals Thermal Resistance across Interfaces Comprising Dimensionally Mismatched Carbon Nanotube-Graphene Junctions in 3D Carbon Nanomaterials

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Jungkyu Park ◽  
Vikas Prakash
Keyword(s):  
Carbon Nanotube ◽  
Thermal Resistance ◽  
Carbon Nanomaterials ◽  
Single Layer ◽  
Unit Cell ◽  
Single Layer Graphene ◽  
Interfacial Thermal Resistance ◽  
Layer Graphene ◽  
Out Of Plane ◽  
Plane Direction

In the present study, reverse nonequilibrium molecular dynamics is employed to study thermal resistance across interfaces comprising dimensionally mismatched junctions of single layer graphene floors with (6,6) single-walled carbon nanotube (SWCNT) pillars in 3D carbon nanomaterials. Results obtained from unit cell analysis indicate the presence of notable interfacial thermal resistance in the out-of-plane direction (along the longitudinal axis of the SWCNTs) but negligible resistance in the in-plane direction along the graphene floor. The interfacial thermal resistance in the out-of-plane direction is understood to be due to the change in dimensionality as well as phonon spectra mismatch as the phonons propagate from SWCNTs to the graphene sheet and then back again to the SWCNTs. The thermal conductivity of the unit cells was observed to increase nearly linearly with an increase in cell size, that is, pillar height as well as interpillar distance, and approaches a plateau as the pillar height and the interpillar distance approach the critical lengths for ballistic thermal transport in SWCNT and single layer graphene. The results indicate that the thermal transport characteristics of these SWCNT-graphene hybrid structures can be tuned by controlling the SWCNT-graphene junction characteristics as well as the unit cell dimensions.

Evaluation of thermal resistance of carbon nanotube film fabricated using an improved slope control of temperature profile growth

2015 ◽  
Vol 54 (4) ◽  
pp. 045101 ◽  
Author(s):  
Akio Kawabata ◽  
Tomo Murakami ◽  
Mizuhisa Nihei ◽  
Kikuo Yamabe ◽  
Naoki Yokoyama
Keyword(s):  
Carbon Nanotube ◽  
Thermal Resistance ◽  
Temperature Profile ◽  
Carbon Nanotube Film

Modeling the interfacial thermal resistance of diamond nanorod composites and related materials

2014 ◽  
Vol 03 (03) ◽  
pp. 1450014 ◽  
Author(s):  
Tad Whiteside ◽  
Marie A. Priest ◽  
Clifford W. Padgett
Keyword(s):  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Thermal Resistance ◽  
Composite System ◽  
Functional Group ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Interfacial Thermal Resistance ◽  
Alkyl Chains ◽  
Dynamics Simulations

In this paper, the effect on the interfacial thermal resistance between a composite system composed of a carbon nanotube or diamond nanorod and an octane matrix by the functionalization of those nanostructures with alkyl chains has been examined using molecular dynamics simulations. The effect of functionalization was studied by varying the percent functionalization from 0.00% to 2.00% using octyl as the functional group. As the percent functionalization increased, both systems showed a decrease in the interfacial thermal resistance. At 1.00% functionalization, as the alkyl chain length was increased from one to eight atoms, the interfacial thermal resistance of the carbon nanotube systems decreased to a minimum, while in the diamond nanorod system the interfacial thermal resistance remained constant.

scholarly journals Prediction of the contact thermal resistance of vertical carbon nanotube arrays

2020 ◽  
Vol 24 (2 Part A) ◽  
pp. 745-756
Author(s):  
Bo Shi ◽  
Han Zhang ◽  
Jin Zhang
Keyword(s):  
Experimental Data ◽  
Surface Roughness ◽  
Carbon Nanotube ◽  
Thermal Resistance ◽  
Interfacial Thermal Resistance ◽  
Nanotube Arrays ◽  
Thermal Interface Materials ◽  
Contact Thermal Resistance ◽  
Carbon Nanotube Arrays ◽  
Interface Materials

The vertical carbon nanotube arrays (VACNT), as a result of its flexibility and axial high thermal conductivity, exert a huge potential and play an increasingly important role in thermal interface materials. This paper proposed a model which can predict the contact thermal resistance of VACNT. The contact thermal resistance of VACNT under different pressures is calculated and compared with the experimental data. Also, the effect of variations in the surface roughness and VACNT parameters on the contact thermal resistance is investigated. Results show that the theoretical results are in good agreement with the experimental data. The contact thermal resistance is composed of interfacial thermal resistance, constriction thermal resistance, and VACNT resistance. Among which the interfacial thermal resistance is the major thermal resistance. The variations in VACNT length and diameter can change the bending degree of VACNT under the same pressure, which presents important implications on contact thermal resistance and can be used to optimize the contact thermal resistance of VACNT. The surface roughness exerts little effect on contact thermal resistance.

Evaluation of Thermal Rectification at the Interface of Double-Layered Nanofilm by Molecular Dynamics Simulations

2008 ◽  
Author(s):  
Juekuan Yang ◽  
Zhenghua Liu ◽  
Yujuan Wang ◽  
Yunfei Chen
Keyword(s):  
Molecular Dynamics ◽  
High Temperature ◽  
Molecular Dynamics Simulation ◽  
Thermal Resistance ◽  
Dynamics Simulation ◽  
Interfacial Thermal Resistance ◽  
Thermal Rectification ◽  
Simulation Results ◽  
Dynamics Simulations ◽  
Increasing Temperature

The thermal rectification at the interface of double-layered nanofilm is investigated by molecular dynamics simulation. It is found that the interfacial thermal resistance is asymmetric, namely, it depends on the direction of heat flow across the interface. And at high temperature, the rectification of interfacial thermal resistance decreases with increasing temperature. The simulation results also demonstrated that the rectifying effects can not be interpreted only by temperature difference at interface.

Molecular Dynamics Simulation of the Thermal Resistance of Carbon Nanotube – Substrate Interfaces

2009 ◽  
Author(s):  
Daniel J. Rogers ◽  
Jianmin Qu ◽  
Matthew Yao
Keyword(s):  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Molecular Dynamics Simulation ◽  
Thermal Resistance ◽  
Copper Substrate ◽  
Harmonic Approximation ◽  
Thermal Conductance ◽  
Dynamics Simulation ◽  
Interfacial Thermal Resistance ◽  
Non Equilibrium Molecular Dynamics

The interfacial thermal resistance (ITR) between a carbon nanotube (CNT) and adjoining carbon, silicon, or copper substrate is investigated through non-equilibrium molecular dynamics simulation (NEMD). The theoretical phonon transmission also is calculated using a simplified form of the diffuse mismatch model (DMM) with direct simulation of the phonon density of states (DOS) under quasi-harmonic approximation. The results of theory and simulation are reported as a function of temperature in order to estimate the importance of anharmonicity and inelastic scattering. At 300K, the thermal conductance of CNT-substrate interfaces is ∼1500 W/mm2K for diamond carbon, ∼500 W/mm2K for silicon, and ∼250 W/mm2K for copper.

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