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Abnormal phase transition between two-dimensional high-density liquid crystal and low-density crystalline solid phases

Author

Listed:
  • Wenbin Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Longjuan Kong

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Baojie Feng

    (Chinese Academy of Sciences)

  • Huixia Fu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Hui Li

    (Beijing University of Chemical Technology)

  • Xiao Cheng Zeng

    (Beijing University of Chemical Technology
    University of Nebraska Lincoln)

  • Kehui Wu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter)

  • Lan Chen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Some two-dimensional liquid systems are theoretically predicted to have an anomalous phase transition due to unique intermolecular interactions, for example the first-order transition between two-dimensional high-density water and low-density amorphous ice. However, it has never been experimentally observed, to the best of our knowledge. Here we report an entropy-driven phase transition between a high-density liquid crystal and low-density crystalline solid, directly observed by scanning tunneling microscope in carbon monoxide adsorbed on Cu(111). Combined with first principle calculations, we find that repulsive dipole–dipole interactions between carbon monoxide molecules lead to unconventional thermodynamics. This finding of unconventional thermodynamics in two-dimensional carbon monoxide not only provides a platform to study the fundamental principles of anomalous phase transitions in two-dimensional liquids at the atomic scale, but may also help to design and develop more efficient copper-based catalysis.

Suggested Citation

  • Wenbin Li & Longjuan Kong & Baojie Feng & Huixia Fu & Hui Li & Xiao Cheng Zeng & Kehui Wu & Lan Chen, 2018. "Abnormal phase transition between two-dimensional high-density liquid crystal and low-density crystalline solid phases," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-017-02634-6
    DOI: 10.1038/s41467-017-02634-6
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    Cited by:

    1. Huiru Liu & Heping Li & Yu He & Peng Cheng & Yi-Qi Zhang & Baojie Feng & Hui Li & Kehui Wu & Lan Chen, 2023. "Condensation and asymmetric amplification of chirality in achiral molecules adsorbed on an achiral surface," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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