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Wettability Transition-Induced Multi-Layer Assembly of Colloids at a Water-Air Interface: An Improved Mechanism

Author

Listed:
  • Guiyun Yi

    (College of Chemistry and Chemical Engineering, Henan Polytechnic University, China)

  • Xiaodong Wang

    (Department of Materials Science and Engineering, Henan Polytechnic University, China)

Abstract

An improved self-assembly mechanism of polystyrene (PS) colloidal microspheres at the water-air interface is proposed and studied systematically. We conclude that to achieve the multi-layer selfassembly, it should satisfy the following two requirements: 1) the density difference between PS microspheres and the dispersion medium should be small enough to enable the PS microspheres to reach the water-air interface easily; 2) The wettability of PS microspheres assembled at the waterair interface changes from wetting to non-wetting with the evaporation of dispersion medium, which allows the water-air interface to stay at the bottom of the assembly body for the continuous self-assembly process. To confirm our conclusion, experiments in combination with theoretical calculations are offered in this article.

Suggested Citation

  • Guiyun Yi & Xiaodong Wang, 2023. "Wettability Transition-Induced Multi-Layer Assembly of Colloids at a Water-Air Interface: An Improved Mechanism," Biomedical Journal of Scientific & Technical Research, Biomedical Research Network+, LLC, vol. 48(5), pages 40099-40104, February.
    • Handle: RePEc:abf:journl:v:48:y:2023:i:5:p:40099-40104
    DOI: 10.26717/BJSTR.2023.48.007712
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