title: Benchmark study of the length dependent thermal conductivity of individual suspended, pristine SWCNTs.
abstract: The thermal conductivity of individual suspended single-walled carbon nanotubes (SWCNTs) has been theoretically predicated to increase with length but this has never been verified experimentally. This then leads to the question of whether the thermal conductivity saturates to a finite constant value in ultra-long SWCNTs. This paper reports on experimental measurements of the thermal conductivity of individual suspended SWCNTs as a function of the characteristic thermal transport length using the same individual suspended SWCNT sample. Interestingly, at around 360 K, the thermal conductivity first increases with increasing characteristic length and then saturates to a finite constant value at a characteristic length of ∼10 μm. These experimental results provide a fundamental understanding of the phonon transport characteristics in suspended, pristine SWCNTs.
authors.affiliation: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China. x-zhang@tsinghua.edu.cn.
authors.forename: Jinhui
authors.identifier: http://orcid.org/0000-0003-2094-0932
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
authors.forename: Tianyi
authors.initials: T
authors.lastname: Li
authors.affiliation: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China. x-zhang@tsinghua.edu.cn.
authors.forename: Yudong
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China. x-zhang@tsinghua.edu.cn.
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang