American Chemical Society
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Scratch-Healing Behavior of Ice by Local Sublimation and Condensation

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journal contribution
posted on 2022-01-19, 21:07 authored by Menno Demmenie, Paul Kolpakov, Yuki Nagata, Sander Woutersen, Daniel Bonn
We show that the surface of ice is scratch healing: micrometer-deep scratches in the ice surface spontaneously disappear by thermal relaxation on the time scale of roughly an hour. Following the dynamics and comparing it to different mass transfer mechanisms, we find that sublimation from and condensation onto the ice surface is the dominant scratch-healing mechanism. The scratch-healing kinetics shows a strong temperature dependence, following an Arrhenius behavior with an activation energy of ΔE = 58.6 ± 4.6 kJ/mol, agreeing with the proposed sublimation mechanism and at odds with surface diffusion or fluid flow or evaporation–condensation from a quasi-liquid layer.