This paper considers phonon transport behavior in graphene nanoribbons (GNRs) that bridge semi-infinite graphene contacts. The work employs an atomistic Green’s function method to investigate phonon wave effects in zigzag and armchair edge ribbons. Phonon transmission functions and thermal conductances are found to be sensitive to the edge shape of structures. The thermal conductances of GNRs with different widths are normalized by the quantum of thermal conductance to reveal the relation between number of phonon modes and conductance as a function of temperature. In addition, the phonon transmission functions of nano ribbons with defects are evaluated by artificially creating mismatches at interfaces. By comparing the transmission function of different defect patterns and the corresponding thermal conductances, the reduction of phonon transport is quantified. The length of defects is found to be important to phonon transport. Constriction effects are also studied at abrupt mismatched interfaces, and the reduction of thermal conductance is found to be moderately high.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4941-5
PROCEEDINGS PAPER
Thermal Conductance and Constriction Resistance of Single-Layer Graphene Nano Ribbons Available to Purchase
Zhen Huang,
Zhen Huang
Purdue University, West Lafayette, IN
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Jayathi Murthy,
Jayathi Murthy
Purdue University, West Lafayette, IN
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Timothy S. Fisher
Timothy S. Fisher
Purdue University, West Lafayette, IN
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Zhen Huang
Purdue University, West Lafayette, IN
Jayathi Murthy
Purdue University, West Lafayette, IN
Timothy S. Fisher
Purdue University, West Lafayette, IN
Paper No:
IHTC14-23088, pp. 473-485; 13 pages
Published Online:
March 1, 2011
Citation
Huang, Z, Murthy, J, & Fisher, TS. "Thermal Conductance and Constriction Resistance of Single-Layer Graphene Nano Ribbons." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 6. Washington, DC, USA. August 8–13, 2010. pp. 473-485. ASME. https://doi.org/10.1115/IHTC14-23088
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