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Title: Reexamination of Basal Plane Thermal Conductivity of Suspended Graphene Samples Measured by Electro-Thermal Micro-Bridge Methods

Journal Article · · AIP Advances
DOI:https://doi.org/10.1063/1.4921519· OSTI ID:1185992
 [1];  [2];  [3];  [1];  [1];  [4];  [1];  [1]
  1. Univ. of Texas, Austin, TX (United States)
  2. Univ. of Connecticut, Storrs, CT (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Louisiana Tech Univ., Ruston, LA (United States)

Thermal transport in suspended graphene samples has been measured in prior works and this work with the use of a suspended electro-thermal micro-bridge method. These measurement results are analyzed here to evaluate and eliminate the errors caused by the extrinsic thermal contact resistance. It is noted that the thermal resistance measured in a recent work increases linearly with the suspended length of the single-layer graphene samples synthesized by chemical vapor deposition (CVD), and that such a feature does not reveal the failure of Fourier s law despite the increase in the apparent thermal conductivity with length. The re-analyzed thermal conductivity of a single-layer CVD graphene sample reaches about ( 1680 180 )Wm-1K-1 at room temperature, which is close to the highest value reported for highly oriented pyrolytic graphite. In comparison, the thermal conductivity values measured for two suspended exfoliated bi-layer graphene samples are about ( 880 60 ) and ( 730 60 ) Wm-1K-1 at room temperature, and approach that of the natural graphite source above room temperature. However, the low-temperature thermal conductivities of these suspended graphene samples are still considerably lower than the graphite values, with the peak thermal conductivities shifted to much higher temperatures. Analysis of the thermal conductivity data reveals that the low temperature behavior is dominated by phonon scattering by polymer residue instead of by the lateral boundary.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185992
Journal Information:
AIP Advances, Vol. 5, Issue 5; ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (12)

Anisotropic Thermal Conductivity of Exfoliated Black Phosphorus journal October 2015
Quantitative study of bundle size effect on thermal conductivity of single-walled carbon nanotubes journal May 2018
Mass measurement of graphene using quartz crystal microbalances journal July 2019
First Principles Peierls-Boltzmann Phonon Thermal Transport: A Topical Review journal April 2016
Comparison of four-probe thermal and thermoelectric transport measurements of thin films and nanostructures with microfabricated electro-thermal transducers journal February 2018
Nanoscale self-assembly of thermoelectric materials: a review of chemistry-based approaches journal August 2018
Phonons and thermal transport in graphene and graphene-based materials journal January 2017
Crossover from ballistic to diffusive thermal transport in suspended graphene membranes journal March 2019
Transient thermal characterization of suspended monolayer MoS 2 journal November 2018
Four-Probe Measurement of Thermal Transport in Suspended Few-Layer Graphene With Polymer Residue journal April 2019
Phonons and Thermal Transport in Graphene and Graphene-Based Materials text January 2016
Mass measurement of graphene using quartz crystal microbalances text January 2019

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