Open AccessExperimental and theoretical study of the length-dependent thermal conductivity of individual single-walled carbon nanotubes
Author(s) -
Zhaoliang Wang,
Liang Jin-Guo,
Dawei Tang,
Yunfeng Zhu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.3391
Subject(s) - thermal conductivity , carbon nanotube , materials science , mean free path , phonon , substrate (aquarium) , thermal , conductivity , length scale , condensed matter physics , thermodynamics , composite material , optics , mechanics , chemistry , physics , scattering , oceanography , geology
We report measurements on the length-dependent thermal conductivity of individual single-walled carbon nanotubes (SWNTs) on a substrate using a four-pad 3ω method with the consideration of heat loss between the sample and substrate. An increase in thermal conductivity with length (0.5—7μm) was observed at room temperature. The length-dependence of thermal conductivity was theoretically predicted by the modified WV model with consideration of second order-3-phonon process. The predicted phonon mean free path is about 175nm. Both the measurement and the prediction show the scale effect of the length on the thermal conductivity of SWNTs.