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<p>The electronic and phonon transport properties of MoS<sub>2</sub> were tailored by fabricating MoS<sub>2</sub>/MWCNT nanocomposites via a hydrothermal route. Incorporation of MWCNT resulted in a 58% enhancement in electrical conductivity, reaching 327 Sm<sup>− 1</sup> at 503&#xa0;K, attributed to strong π-π interactions, reduced hopping energy of 0.228&#xa0;eV and Fermi level shift toward the valence band. The MWCNT also acted as effective phonon scattering centres, reducing the thermal conductivity to 0.499 Wm<sup>− 1</sup>K<sup>− 1</sup> at 453&#xa0;K. HRTEM analysis revealed defects such as grain boundaries, dislocations and interfaces between 1D-MWCNT and 2D-MoS<sub>2</sub>, which further promoted phonon scattering. Raman spectroscopy confirmed a reduction in Debye temperature and average sound velocity, indicating lattice softening. Overall, the incorporation of MWCNT in MoS<sub>2</sub> not only facilitates carrier transport by serving as conductive bridges between MoS<sub>2</sub> layers but also enhances phonon scattering, thereby optimizing thermoelectric performance.</p>

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Interface and dimensionality driven engineering of carrier transport and phonon dynamics in MoS2/MWCNT nanocomposites

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Simon Sajan John,
  • Mohamed Jibri Khaja Peer,
  • Abinaya Rengarajan,
  • Archana Jayaram,
  • M. Navaneethan

摘要

The electronic and phonon transport properties of MoS2 were tailored by fabricating MoS2/MWCNT nanocomposites via a hydrothermal route. Incorporation of MWCNT resulted in a 58% enhancement in electrical conductivity, reaching 327 Sm− 1 at 503 K, attributed to strong π-π interactions, reduced hopping energy of 0.228 eV and Fermi level shift toward the valence band. The MWCNT also acted as effective phonon scattering centres, reducing the thermal conductivity to 0.499 Wm− 1K− 1 at 453 K. HRTEM analysis revealed defects such as grain boundaries, dislocations and interfaces between 1D-MWCNT and 2D-MoS2, which further promoted phonon scattering. Raman spectroscopy confirmed a reduction in Debye temperature and average sound velocity, indicating lattice softening. Overall, the incorporation of MWCNT in MoS2 not only facilitates carrier transport by serving as conductive bridges between MoS2 layers but also enhances phonon scattering, thereby optimizing thermoelectric performance.