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Updated: Sep 11, 2025

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
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Self-Propelled Ice on Herringbones.

Jack T Tapocik1, Venkata Yashasvi Lolla1, Sarah E Propst2

  • 1Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States.

ACS Applied Materials & Interfaces
|August 14, 2025
PubMed
Summary
This summary is machine-generated.

Melting ice disks self-propel on hydrophilic surfaces via meltwater flow. On superhydrophobic surfaces, ice disks dislodge and slingshot due to Laplace pressure differences.

Keywords:
Leidenfrosticephase-changeself-propulsionsuperhydrophobic

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Area of Science:

  • Physics
  • Materials Science
  • Surface Science

Background:

  • Droplets and sublimating solids exhibit self-propulsion on asymmetric surfaces via Leidenfrost ratchets.
  • This phenomenon relies on viscous entrainment with underlying vapor flow.

Purpose of the Study:

  • Investigate solid-liquid self-propulsion of melting ice disks.
  • Extend the understanding of ratcheting phenomena to a more viscous regime.

Main Methods:

  • Utilized hydrophilic and superhydrophobic herringbone surface structures.
  • Observed the motion of melting ice disks on these surfaces.
  • Analyzed the role of meltwater flow and Laplace pressure.

Main Results:

  • Ice disks self-propelled on hydrophilic surfaces through unidirectional viscous meltwater flow.
  • On superhydrophobic surfaces, ice disks initially adhered, then dislodged and moved due to Laplace pressure mismatch.
  • A start-up time was required for meltwater channel filling on hydrophilic surfaces and for dislodging on superhydrophobic surfaces.

Conclusions:

  • Demonstrated solid-liquid self-propulsion of melting ice disks, analogous to Leidenfrost ratchets but in a viscous regime.
  • Highlighted the distinct mechanisms of self-propulsion on hydrophilic (viscous entrainment) and superhydrophobic (Laplace pressure) surfaces.
  • Identified the critical role of surface wettability and geometry in controlling ice disk motion.