TY - JOUR
T1 - Width dependent intrinsic thermal conductivity of suspended monolayer graphene
AU - Wang, Haidong
AU - Kurata, Kosaku
AU - Fukunaga, Takanobu
AU - Zhang, Xing
AU - Takamatsu, Hiroshi
N1 - Funding Information:
Tehis work was supported by the JSPS KAKENHI Grant-in-Aid for Young Scientists B (No. 15K17987 ), Research of Development of Young Researchers in Kyushu University (2015) and National Natural Science Foundation of China Grant Nos. 51636002 , 51327001 , 51136001 and 51356001 .
Publisher Copyright:
© 2016 Elsevier Ltd
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Size dependence is one of the most important unique features of thermal conductivity in two-dimensional materials. Suspended single-layer graphene (SLG) provides a perfect platform for studying the size dependent phonon transport. Here we report measurement and theoretical analysis of heat conduction in suspended SLG as a function of width and temperature. The thermal conductivity of graphene was larger for wider SLG. This width effect was smaller at higher temperatures. In suspended SLG, the long wave-length phonons tend to be more scattered at the lateral boundaries of narrow SLG ribbon, in which the mean free path of phonons is close to the sample width. This behavior can be understood as a mode selectivity of phonon-boundary scattering for suspended SLG. The result revealed the unique width dependence of thermal conductivity in suspended SLG and provided useful guidelines for the future SLG-based thermal applications.
AB - Size dependence is one of the most important unique features of thermal conductivity in two-dimensional materials. Suspended single-layer graphene (SLG) provides a perfect platform for studying the size dependent phonon transport. Here we report measurement and theoretical analysis of heat conduction in suspended SLG as a function of width and temperature. The thermal conductivity of graphene was larger for wider SLG. This width effect was smaller at higher temperatures. In suspended SLG, the long wave-length phonons tend to be more scattered at the lateral boundaries of narrow SLG ribbon, in which the mean free path of phonons is close to the sample width. This behavior can be understood as a mode selectivity of phonon-boundary scattering for suspended SLG. The result revealed the unique width dependence of thermal conductivity in suspended SLG and provided useful guidelines for the future SLG-based thermal applications.
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U2 - 10.1016/j.ijheatmasstransfer.2016.09.054
DO - 10.1016/j.ijheatmasstransfer.2016.09.054
M3 - Article
AN - SCOPUS:84988557273
VL - 105
SP - 76
EP - 80
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
ER -