Thermal Transport in Quasi-1D van der Waals Crystal Ta2 Pd3 Se8 Nanowires: Size and Length Dependence

ACS Nano
Qian ZhangDeyu Li

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 ...Continue Reading

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Citations

Jul 25, 2018·Advanced Materials·Bing NiXun Wang
Jul 6, 2019·Nanoscale·Roman AnufrievMasahiro Nomura
Aug 21, 2019·Nanotechnology·Jing XueYuanping Chen
Jun 24, 2020·Physical Chemistry Chemical Physics : PCCP·Ekaterina V SukhanovaPavel B Sorokin
Sep 23, 2020·Physical Chemistry Chemical Physics : PCCP·Zhiliang PanDeyu Li
Apr 17, 2021·Nature Nanotechnology·Lin YangDeyu Li
Aug 3, 2021·Small·Kyung Hwan ChoiJae-Young Choi
Mar 19, 2019·Chemical Reviews·Renkun ChenDeyu Li
Nov 17, 2020·Nano Letters·Yucheng XiongDongyan Xu

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