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Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces

Author

Listed:
  • Qi Zhang

    (Beihang University
    Chinese Academy of Sciences)

  • Wei Li

    (Suzhou Laboratory
    GuSu Laboratory of Materials)

  • Ruixuan Zhao

    (Beihang University)

  • Peizhe Tang

    (Beihang University)

  • Jie Zhao

    (Chinese Academy of Sciences)

  • Guorong Wu

    (Chinese Academy of Sciences)

  • Xin Chen

    (Suzhou Laboratory
    GuSu Laboratory of Materials)

  • Mingjun Hu

    (Beihang University)

  • Kaijun Yuan

    (Chinese Academy of Sciences
    Hefei National Laboratory
    University of Chinese Academy of Sciences)

  • Jiebo Li

    (Beihang University)

  • Xueming Yang

    (Chinese Academy of Sciences
    Hefei National Laboratory
    Southern University of Science and Technology)

Abstract

The photoinduced non-thermalized hot electrons at an interface play a pivotal role in determining plasmonic driven chemical events. However, understanding non-thermalized electron dynamics, which precedes electron thermalization (~125 fs), remains a grand challenge. Herein, we simultaneously captured the dynamics of both molecules and non-thermalized electrons in the MXene/molecule complexes by femtosecond time-resolved spectroscopy. The real-time observation allows for distinguishing non-thermalized and thermalized electron responses. Differing from the thermalized electron/heat transfer, our results reveal two non-thermalized electron dynamical pathways: (i) the non-thermalized electrons directly transfer to attached molecules at an interface within 50 fs; (ii) the non-thermalized electrons scatter at the interface within 125 fs, inducing adsorbed molecules heating. These two distinctive pathways are dependent on the irradiating wavelength and the energy difference between MXene and adsorbed molecules. This research sheds light on the fundamental mechanism and opens opportunities in photocatalysis and interfacial heat transfer theory.

Suggested Citation

  • Qi Zhang & Wei Li & Ruixuan Zhao & Peizhe Tang & Jie Zhao & Guorong Wu & Xin Chen & Mingjun Hu & Kaijun Yuan & Jiebo Li & Xueming Yang, 2024. "Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48842-9
    DOI: 10.1038/s41467-024-48842-9
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    References listed on IDEAS

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