Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 76-80 |
| Number of pages | 5 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 105 |
| DOIs | |
| Publication status | Published - Feb 1 2017 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes
Cite this
Width dependent intrinsic thermal conductivity of suspended monolayer graphene. / Wang, Haidong; Kurata, Kosaku; Fukunaga, Takanobu; Zhang, Xing; Takamatsu, Hiroshi.
In: International Journal of Heat and Mass Transfer, Vol. 105, 01.02.2017, p. 76-80.Research output: Contribution to journal › Article
}
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
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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UR - http://www.scopus.com/inward/citedby.url?scp=84988557273&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2016.09.054
DO - 10.1016/j.ijheatmasstransfer.2016.09.054
M3 - Article
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 -