Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures
AU - Pumarol Crestar, Manuel
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
Y1 - 2012/6
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 - Nanoscale thermal transport
KW - nanoscale imaging
KW - ballistic phonons
KW - thermal conductivity
KW - graphene
KW - scanning thermal microscopy
UR - http://www.scopus.com/inward/record.url?scp=84862292641&partnerID=8YFLogxK
U2 - 10.1021/nl3004946
DO - 10.1021/nl3004946
M3 - Journal article
VL - 12
SP - 2906
EP - 2911
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 6
ER -