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Quasi-liquid Layers in Grooves of Grain Boundaries and on Grain Surfaces of Polycrystalline Ice Thin Films

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Title: Quasi-liquid Layers in Grooves of Grain Boundaries and on Grain Surfaces of Polycrystalline Ice Thin Films
Authors: Chen, Jialu Browse this author
Maki, Takao Browse this author
Nagashima, Ken Browse this author →KAKEN DB
Murata, Ken-ichiro Browse this author →KAKEN DB
Sazaki, Gen Browse this author →KAKEN DB
Issue Date: 4-Nov-2020
Publisher: American Chemical Society
Journal Title: Crystal growth & design
Volume: 20
Issue: 11
Start Page: 7188
End Page: 7196
Publisher DOI: 10.1021/acs.cgd.0c00799
Abstract: In nature, a large proportion of ice is present in a polycrystalline state. Thus, understanding the formation of quasi-liquid layers (QLLs) on/in polycrystalline ice is indispensable for understanding a wide variety of natural phenomena. In this study, we observed surfaces of polycrystalline ice thin films using our advanced optical microscope. We focused our attention on the macroscopic fluidity of objects observed on polycrystalline ice surfaces as evidence for the presence of QLLs. Systematic observations under various temperatures and water vapor pressures showed that, with increasing temperature, QLLs first appeared preferentially in grooves of grain boundaries and continued to exist at -1.9 +/- 0.4 degrees C, irrespective of the water vapor pressure (even in immediate vicinities of the vapor-ice equilibrium curve). From this result, we concluded that the QLLs were formed by melting of grain boundaries to relax lattice mismatches. With a further increase of temperature, droplet-type QLLs appeared on grain surfaces at -0.7 +/- 0.2 degrees C. However, as time elapsed, the droplet-type QLLs on the grain surfaces spontaneously disappeared within 5 +/- 3 min even though temperature and water vapor pressure were kept constant. Such appearance and subsequent disappearance of the droplet-type QLLs on the grain surfaces were observed even under relatively highly supersaturated and undersaturated conditions.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth & Design, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐崎 元

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