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<p>As the demand for advanced thermal management materials continues to grow, high thermal conductivity materials, especially those with superior chemical stability and mechanical strength, are increasingly sought after from both theoretical and applied perspectives. Two-dimensional transition metal carbides (MXenes) meet these criteria and have been theoretically predicted to possess high thermal conductivity. However, experimental validation of their intrinsic transport properties—particularly the effects of surface terminations, lateral size, and thickness—remains limited due to the difficulty of obtaining clean, large-area samples. Here, we experimentally investigate single-flake Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> with thicknesses ranging from ~9 to 45 nm to reveal its thickness-dependent thermal behavior. Using the energy transport state-resolved Raman technique, we measured thermal conductivities ranging from 30.6 W m<sup>−1</sup> K<sup>−1</sup> to 105 W m<sup>−1</sup> K<sup>−1</sup>, consistent with theoretical predictions. These results offer direct insight into intrinsic thermal transport in MXenes and underscore their promise for efficient thermal management applications.</p><p></p>

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Thermal conductivity and its thickness dependence in single-flake few-layer 2D transition metal carbide (Ti3C2Tx)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月28日

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  • Yurui Liu,
  • Mahya Rahbar,
  • Amin Karamati,
  • Zhe Fei,
  • Yuanchen Chi,
  • G. Jeffrey Snyder,
  • Eleonora Isotta,
  • Xinwei Wang,
  • Yue Wu

摘要

As the demand for advanced thermal management materials continues to grow, high thermal conductivity materials, especially those with superior chemical stability and mechanical strength, are increasingly sought after from both theoretical and applied perspectives. Two-dimensional transition metal carbides (MXenes) meet these criteria and have been theoretically predicted to possess high thermal conductivity. However, experimental validation of their intrinsic transport properties—particularly the effects of surface terminations, lateral size, and thickness—remains limited due to the difficulty of obtaining clean, large-area samples. Here, we experimentally investigate single-flake Ti3C2Tx with thicknesses ranging from ~9 to 45 nm to reveal its thickness-dependent thermal behavior. Using the energy transport state-resolved Raman technique, we measured thermal conductivities ranging from 30.6 W m−1 K−1 to 105 W m−1 K−1, consistent with theoretical predictions. These results offer direct insight into intrinsic thermal transport in MXenes and underscore their promise for efficient thermal management applications.