Effect of Length, Diameter, Chirality, Deformation, and Strain on Contact Thermal Conductance Between Single-Wall Carbon Nanotubes

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This article explores the role of various geometrical and structural (length, diameter, chirality) as well as external (deformation and strain) carbon nanotube (CNT) parameters to estimate total as well as area-normalized thermal conductance across cross-contact interconnects.

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12 p.

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Varshney, Vikas; Lee, Jonghoon; Brown, Joshua S.; Farmer, Barry L.; Voevodin, Andrey A. & Roy, Ajit April 16, 2018.

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Description

This article explores the role of various geometrical and structural (length, diameter, chirality) as well as external (deformation and strain) carbon nanotube (CNT) parameters to estimate total as well as area-normalized thermal conductance across cross-contact interconnects.

Physical Description

12 p.

Notes

Abstract: Thermal energy transfer across physically interacting single-wall carbon nanotube interconnects
has been investigated using non-equilibrium molecular dynamics simulations.
The role of various geometrical and structural (length, diameter, chirality) as well as
external (deformation and strain) carbon nanotube (CNT) parameters has been explored
to estimate total as well as area-normalized thermal conductance across cross-contact
interconnects. It is shown that the CNT aspect ratio and degree of lateral as well as
tensile deformation play a significant role in determining the extent of thermal energy
exchange across CNT contacts, while CNT chirality has a negligible influence on thermal
transport. Depending on the CNT diameter, aspect ratio, and degree of deformation at the
contact interface, the thermal conductance values can vary significantly—by more than
an order of magnitude for total conductance and a factor of 3 to 4 for area-normalized
conductance. The observed trends are discussed from the perspective of modulation
in number of low-frequency out-of-plane (transverse, flexural, and radial) phonons that
transmit thermal energy across the contact and govern the conductance across the
interface. The established general dependencies for phonon-governed thermal transport
at CNT contacts are anticipated to help design and performance prediction of CNTbased
flexible nanoelectronic devices, where CNT–CNT contact deformation and strain
are routinely encountered during device operations.

Source

  • Frontiers in Materials, 2018. Lausanne, Switzerland: Frontiers Research Foundation

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Publication Information

  • Publication Title: Frontiers in Materials
  • Volume: 5
  • Pages: 1-12
  • Peer Reviewed: Yes

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UNT Scholarly Works

Materials from the UNT community's research, creative, and scholarly activities and UNT's Open Access Repository. Access to some items in this collection may be restricted.

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  • November 21, 2017

Accepted Date

  • March 12, 2018

Creation Date

  • April 16, 2018

Added to The UNT Digital Library

  • May 16, 2018, 2:54 p.m.

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Varshney, Vikas; Lee, Jonghoon; Brown, Joshua S.; Farmer, Barry L.; Voevodin, Andrey A. & Roy, Ajit. Effect of Length, Diameter, Chirality, Deformation, and Strain on Contact Thermal Conductance Between Single-Wall Carbon Nanotubes, article, April 16, 2018; Lausanne, Switzerland. (digital.library.unt.edu/ark:/67531/metadc1152217/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.