Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures

Manuel E. Pumarol; Mark C. Rosamond; Peter Tovee; Michael C. Petty; Dagou A. Zeze; Vladimir Falko; Oleg V. Kolosov

doi:10.1021/nl3004946

Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures

Manuel E. Pumarol
, Mark C. Rosamond
, Peter Tovee
, Michael C. Petty
, Dagou A. Zeze
, Vladimir Falko
, Oleg V. Kolosov^*

^*Corresponding author for this work

Lancaster University
University of Durham
University of Durham

Research output: Contribution to journal › Article › peer-review

Abstract

We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.

Original language	English
Pages (from-to)	2906-2911
Number of pages	6
Journal	Nano Letters
Volume	12
Issue number	6
DOIs	https://doi.org/10.1021/nl3004946
Publication status	Published - 13 Jun 2012

Keywords

ballistic phonons
graphene
nanoscale imaging
Nanoscale thermal transport
scanning thermal microscopy
thermal conductivity

Research Highlights, Institutes and Platforms

National Graphene Institute

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10.1021/nl3004946

Cite this

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title = "Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures",

abstract = "We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.",

keywords = "ballistic phonons, graphene, nanoscale imaging, Nanoscale thermal transport, scanning thermal microscopy, thermal conductivity",

author = "Pumarol, \{Manuel E.\} and Rosamond, \{Mark C.\} and Peter Tovee and Petty, \{Michael C.\} and Zeze, \{Dagou A.\} and Vladimir Falko and Kolosov, \{Oleg V.\}",

year = "2012",

month = jun,

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doi = "10.1021/nl3004946",

language = "English",

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journal = "Nano Letters",

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T1 - Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures

AU - Pumarol, Manuel E.

AU - Rosamond, Mark C.

AU - Tovee, Peter

AU - Petty, Michael C.

AU - Zeze, Dagou A.

AU - Falko, Vladimir

AU - Kolosov, Oleg V.

PY - 2012/6/13

Y1 - 2012/6/13

N2 - We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.

AB - We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.

KW - ballistic phonons

KW - graphene

KW - nanoscale imaging

KW - Nanoscale thermal transport

KW - scanning thermal microscopy

KW - thermal conductivity

UR - https://www.scopus.com/pages/publications/84862292641

U2 - 10.1021/nl3004946

DO - 10.1021/nl3004946

M3 - Article

C2 - 22524441

AN - SCOPUS:84862292641

SN - 1530-6984

VL - 12

SP - 2906

EP - 2911

JO - Nano Letters

JF - Nano Letters

IS - 6

ER -

Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures

Abstract

Keywords

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