TY - JOUR
T1 - Low- and High-Density Unknown Waters at Ice-Water Interfaces
AU - Niinomi, Hiromasa
AU - Kouch, Akira
AU - Hama, Tetsuya
AU - Nada, Hiroki
AU - Yamazaki, Tomoya
AU - Kimura, Yuki
N1 - Funding Information:
The authors thank Y. Sato, S. Mori, and S. Saito for helping with the fabrication of d-SAC. This research was supported by the Grant for the Joint Research Program of the Institute of Low Temperature Science, Hokkaido University (18K001) and the Sasakawa Scientific Research Grant from the Japan Science Society (2021-2001).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022
Y1 - 2022
N2 - Experimental confirmation of liquid polymorphs of water, high-density liquid (HDL) and low-density liquid (LDL), is desired for understanding not only the liquid state of matter but also the origin of the mysterious properties of water. However, this remains challenging because the liquid-liquid critical point of water lies in experimentally inaccessible supercooling conditions known as "no man's land". Here, we show by in situ optical microscopy that droplets and layers of low- and high-density unknown waters (LDUW and HDUW) appear macroscopically depending upon ice polymorphs at non-equilibrium interfaces between water and ices under experimentally accessible (de)pressurization conditions. These unknown waters were found to have characteristic velocities (about 20 and 100 m/s for LDUW and HDUW, respectively) different from water (about 40 m/s) and quasi-liquid layers (QLLs) (about 2 and 0.2 m/s for droplet and layer forms of QLLs, respectively). Our discoveries provide insight on liquid polymorphism of water.
AB - Experimental confirmation of liquid polymorphs of water, high-density liquid (HDL) and low-density liquid (LDL), is desired for understanding not only the liquid state of matter but also the origin of the mysterious properties of water. However, this remains challenging because the liquid-liquid critical point of water lies in experimentally inaccessible supercooling conditions known as "no man's land". Here, we show by in situ optical microscopy that droplets and layers of low- and high-density unknown waters (LDUW and HDUW) appear macroscopically depending upon ice polymorphs at non-equilibrium interfaces between water and ices under experimentally accessible (de)pressurization conditions. These unknown waters were found to have characteristic velocities (about 20 and 100 m/s for LDUW and HDUW, respectively) different from water (about 40 m/s) and quasi-liquid layers (QLLs) (about 2 and 0.2 m/s for droplet and layer forms of QLLs, respectively). Our discoveries provide insight on liquid polymorphism of water.
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U2 - 10.1021/acs.jpclett.2c00660
DO - 10.1021/acs.jpclett.2c00660
M3 - Article
C2 - 35543729
AN - SCOPUS:85130767322
SN - 1948-7185
SP - 4251
EP - 4256
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
ER -