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Cited by 332

The DOI matches its Crossref record; 69 of the 69 references it cites were found in a registry or an index.

Ballistic to diffusive crossover of heat flow in graphene ribbons

Open access
Bae, Myung-Ho, Li, Zuanyi, Aksamija, Zlatan, Martin, Pierre N, Xiong, Feng, Ong, Zhun-Yong, Knezevic, Irena, Pop, Eric·2013·Nature Communications

Abstract

Heat flow in nanomaterials is an important area of study, with both fundamental and technological implications. However, little is known about heat flow in two-dimensional devices or interconnects with dimensions comparable to the phonon mean free path. Here we find that short, quarter-micron graphene samples reach ~35% of the ballistic thermal conductance limit up to room temperature, enabled by the relatively large phonon mean free path (~100 nm) in substrate-supported graphene. In contrast, patterning similar samples into nanoribbons leads to a diffusive heat-flow regime that is controlled by ribbon width and edge disorder. In the edge-controlled regime, the graphene nanoribbon thermal conductivity scales with width approximately as ~W1.80.3, being about 100 W m−1 K−1 in 65-nm-wide graphene nanoribbons, at room temperature. These results show how manipulation oftwo-dimensional device dimensions and edges can be used to achieve full control of their heat-carrying properties, approaching fundamentally limited upper or lower bounds. Understanding heat flow in two-dimensional nanomaterials has wide-ranging implications. Here, the authors show that the thermal conductance of quarter-micron graphene samples is quasi-ballistic, but patterning the graphene into nanoribbons leads to diffusive heat flow strongly limited by edge scattering.

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Metadata

Authors
Bae, M.-H., Li, Z., Aksamija, Z., Martin, P. N., Xiong, F., Ong, Z.-Y., Knezevic, I., & Pop, E.
Venue
Nature Communications
Published
2013-04-16
Volume
4
Issue
1
Pages
1734-1734
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2144275451
Cited by
332
References
69
FWCI
14.06
Type
journal article
Language
en
Open access
green

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