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Distinct ice patterns on solid surfaces with various wettabilities.

Jie Liu1,2, Chongqin Zhu3,4, Kai Liu1,2

  • 1Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Proceedings of the National Academy of Sciences of the United States of America
|October 27, 2017
PubMed
Summary
This summary is machine-generated.

Surface wettability dictates ice crystal growth patterns. Hydrophilic surfaces promote along-surface growth via bilayer ice formation, impacting ice repellency.

Keywords:
antiicingice crystalice growthmolecular dynamics simulationsurface wettability

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Area of Science:

  • Materials Science
  • Surface Science
  • Crystallography

Background:

  • Ice formation on solid surfaces is common, yet the link between surface properties and ice growth is not well understood.
  • Existing studies often fail to isolate surface wettability effects due to uncontrolled nucleation.

Purpose of the Study:

  • To investigate the relationship between surface wettability and ice crystal morphology under controlled conditions.
  • To identify and characterize distinct ice growth modes on solid surfaces.

Main Methods:

  • Experimental observations using a specialized process to eliminate nucleation influences.
  • Atomistic molecular dynamics simulations to analyze ice growth mechanisms.
  • Investigation of ice growth on surfaces with varying wettability under atmospheric conditions.

Main Results:

  • Discovery of two primary ice crystal growth modes: along-surface and off-surface.
  • Wettability-dependent ice morphology was observed, with hydrophilic surfaces exhibiting distinct growth patterns.
  • Bilayer ice formation on hydrophilic surfaces was identified as the cause of along-surface growth, facilitating rapid nonbasal face expansion.

Conclusions:

  • Surface wettability significantly influences ice crystal morphology and growth modes.
  • The presence of bilayer ice on hydrophilic surfaces promotes along-surface growth due to structural compatibility with ice Ih.
  • Understanding these growth patterns is critical for developing advanced ice-repellent surfaces.