Thermal Transport in Quasi-1D van der Waals Crystal Ta2Pd3Se8 Nanowires: Size and Length Dependence

Qian Zhang, Chenhan Liu, Xue Liu, Jinyu Liu, Zhiguang Cui, Yin Zhang, Lin Yang, Yang Zhao, Terry T. Xu, Yunfei Chen, Jiang Wei, Zhiqiang Mao, Deyu Li

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Van der Waals (vdW) crystals with covalently bonded building blocks assembled together through vdW interactions have attracted tremendous attention recently because of their interesting properties and promising applications. Compared to the explosive research on two-dimensional (2D) vdW materials, quasi-one-dimensional (quasi-1D) vdW crystals have received considerably less attention, while they also present rich physics and engineering implications. Here we report on the thermal conductivity of exfoliated quasi-1D Ta2Pd3Se8 vdW nanowires. Interestingly, even though the interatomic interactions along each molecular chain are much stronger than the interchain vdW interactions, the measured thermal conductivity still demonstrates a clear dependence on the cross-sectional size up to >110 nm. The results also reveal that partial ballistic phonon transport can persist over 13 μm at room temperature along the molecular chain direction, the longest experimentally observed ballistic transport distance with observable effects on thermal conductivity so far. First-principles calculations suggest that the ultralong ballistic phonon transport arises from the highly focused longitudinal phonons propagating along the molecular chains. These data help to understand phonon transport through quasi-1D vdW crystals, facilitating various applications of this class of materials.

Original languageEnglish (US)
Pages (from-to)2634-2642
Number of pages9
JournalACS nano
Volume12
Issue number3
DOIs
StatePublished - Mar 27 2018

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molecular chains
Ballistics
ballistics
Nanowires
Thermal conductivity
nanowires
thermal conductivity
Crystals
crystals
interactions
Phonons
phonons
Physics
engineering
physics
room temperature
Hot Temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Zhang, Q., Liu, C., Liu, X., Liu, J., Cui, Z., Zhang, Y., ... Li, D. (2018). Thermal Transport in Quasi-1D van der Waals Crystal Ta2Pd3Se8 Nanowires: Size and Length Dependence. ACS nano, 12(3), 2634-2642. https://doi.org/10.1021/acsnano.7b08718
Zhang, Qian ; Liu, Chenhan ; Liu, Xue ; Liu, Jinyu ; Cui, Zhiguang ; Zhang, Yin ; Yang, Lin ; Zhao, Yang ; Xu, Terry T. ; Chen, Yunfei ; Wei, Jiang ; Mao, Zhiqiang ; Li, Deyu. / Thermal Transport in Quasi-1D van der Waals Crystal Ta2Pd3Se8 Nanowires : Size and Length Dependence. In: ACS nano. 2018 ; Vol. 12, No. 3. pp. 2634-2642.
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abstract = "Van der Waals (vdW) crystals with covalently bonded building blocks assembled together through vdW interactions have attracted tremendous attention recently because of their interesting properties and promising applications. Compared to the explosive research on two-dimensional (2D) vdW materials, quasi-one-dimensional (quasi-1D) vdW crystals have received considerably less attention, while they also present rich physics and engineering implications. Here we report on the thermal conductivity of exfoliated quasi-1D Ta2Pd3Se8 vdW nanowires. Interestingly, even though the interatomic interactions along each molecular chain are much stronger than the interchain vdW interactions, the measured thermal conductivity still demonstrates a clear dependence on the cross-sectional size up to >110 nm. The results also reveal that partial ballistic phonon transport can persist over 13 μm at room temperature along the molecular chain direction, the longest experimentally observed ballistic transport distance with observable effects on thermal conductivity so far. First-principles calculations suggest that the ultralong ballistic phonon transport arises from the highly focused longitudinal phonons propagating along the molecular chains. These data help to understand phonon transport through quasi-1D vdW crystals, facilitating various applications of this class of materials.",
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Zhang, Q, Liu, C, Liu, X, Liu, J, Cui, Z, Zhang, Y, Yang, L, Zhao, Y, Xu, TT, Chen, Y, Wei, J, Mao, Z & Li, D 2018, 'Thermal Transport in Quasi-1D van der Waals Crystal Ta2Pd3Se8 Nanowires: Size and Length Dependence', ACS nano, vol. 12, no. 3, pp. 2634-2642. https://doi.org/10.1021/acsnano.7b08718

Thermal Transport in Quasi-1D van der Waals Crystal Ta2Pd3Se8 Nanowires : Size and Length Dependence. / Zhang, Qian; Liu, Chenhan; Liu, Xue; Liu, Jinyu; Cui, Zhiguang; Zhang, Yin; Yang, Lin; Zhao, Yang; Xu, Terry T.; Chen, Yunfei; Wei, Jiang; Mao, Zhiqiang; Li, Deyu.

In: ACS nano, Vol. 12, No. 3, 27.03.2018, p. 2634-2642.

Research output: Contribution to journalArticle

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T2 - Size and Length Dependence

AU - Zhang, Qian

AU - Liu, Chenhan

AU - Liu, Xue

AU - Liu, Jinyu

AU - Cui, Zhiguang

AU - Zhang, Yin

AU - Yang, Lin

AU - Zhao, Yang

AU - Xu, Terry T.

AU - Chen, Yunfei

AU - Wei, Jiang

AU - Mao, Zhiqiang

AU - Li, Deyu

PY - 2018/3/27

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N2 - Van der Waals (vdW) crystals with covalently bonded building blocks assembled together through vdW interactions have attracted tremendous attention recently because of their interesting properties and promising applications. Compared to the explosive research on two-dimensional (2D) vdW materials, quasi-one-dimensional (quasi-1D) vdW crystals have received considerably less attention, while they also present rich physics and engineering implications. Here we report on the thermal conductivity of exfoliated quasi-1D Ta2Pd3Se8 vdW nanowires. Interestingly, even though the interatomic interactions along each molecular chain are much stronger than the interchain vdW interactions, the measured thermal conductivity still demonstrates a clear dependence on the cross-sectional size up to >110 nm. The results also reveal that partial ballistic phonon transport can persist over 13 μm at room temperature along the molecular chain direction, the longest experimentally observed ballistic transport distance with observable effects on thermal conductivity so far. First-principles calculations suggest that the ultralong ballistic phonon transport arises from the highly focused longitudinal phonons propagating along the molecular chains. These data help to understand phonon transport through quasi-1D vdW crystals, facilitating various applications of this class of materials.

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