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Gen Sazaki
Hokkaido University
221Publications
29H-index
2,744Citations
Publications 221
Newest
Published on Jun 3, 2019in Philosophical Transactions of the Royal Society A
Yoshinori Furukawa23
Estimated H-index: 23
(Hokkaido University),
Ken Nagashima9
Estimated H-index: 9
(Hokkaido University)
+ 3 AuthorsGen Sazaki29
Estimated H-index: 29
(Hokkaido University)
An impurity effect on ice crystal growth in supercooled water is an important subject in relation to ice crystal formation in various conditions in the Earth's cryosphere regions. In this review, we consider antifreeze glycoprotein molecules as an impurity. These molecules are well known as functional molecules for controlling ice crystal growth by their adsorption on growing ice/water interfaces. Experiments on free growth of ice crystals in supercooled water containing an antifreeze protein we...
Published on Apr 16, 2019in Accounts of Chemical Research21.66
Yuki Nagata21
Estimated H-index: 21
(MPG: Max Planck Society),
Tetsuya Hama15
Estimated H-index: 15
(Hokkaido University)
+ 4 AuthorsGen Sazaki29
Estimated H-index: 29
(Hokkaido University)
ConspectusThe ice premelt, often called the quasi-liquid layer (QLL), is key for the lubrication of ice, gas uptake by ice, and growth of aerosols. Despite its apparent importance, in-depth understanding of the ice premelt from the microscopic to the macroscopic scale has not been gained. By reviewing data obtained using molecular dynamics (MD) simulations, sum-frequency generation (SFG) spectroscopy, and laser confocal differential interference contrast microscopy (LCM-DIM), we provide a unifie...
Published on Jan 18, 2019in Physical Review Letters9.23
Ken-ichiro Murata8
Estimated H-index: 8
,
Ken Nagashima9
Estimated H-index: 9
,
Gen Sazaki29
Estimated H-index: 29
Published on Jan 2, 2019in Crystal Growth & Design4.15
Jialu Chen (Hokkaido University), Ken Nagashima9
Estimated H-index: 9
(Hokkaido University)
+ 1 AuthorsGen Sazaki29
Estimated H-index: 29
(Hokkaido University)
Surface melting of ice crystals proceeds below the melting point (0 °C) and forms thin liquid water layers, called quasi-liquid layers (QLLs), which govern a wide variety of phenomena in nature. Hence, many studies have been performed so far; however, the lowest temperature above which QLLs exist on ice crystal surfaces varied from −90 to −1 °C. To reveal the cause of such significant variations, here we show, by laser confocal microscopy combined with Michelson interferometry, the behavior of Q...
Published on Dec 27, 2018in Journal of Physical Chemistry B2.92
Fumitoshi Kaneko18
Estimated H-index: 18
(Osaka University),
Chihiro Katagiri (Tokyo Denki University)+ 1 AuthorsKen Nagashima9
Estimated H-index: 9
(Hokkaido University)
To protect themselves, insects cover their bodies with what is called cuticular lipid. The cuticular lipid of an American cockroach has a unique lipid content; the most abundant is a cis-alkadiene, cis,cis-6,9-heptacosadiene, amounting to about 70%, which is followed by a branched alkane 3-methylpentacosane. In order to clarify the structural features of the unique lipid composition below the critical temperature, the cuticular lipid was studied by Fourier transform infrared (FTIR) spectroscopy ...
Published on Sep 10, 2018in Physical Review Materials
Ken-ichiro Murata8
Estimated H-index: 8
,
Ken Nagashima9
Estimated H-index: 9
,
Gen Sazaki29
Estimated H-index: 29
Maddalena Bayer-Giraldi2
Estimated H-index: 2
(Hokkaido University),
Gen Sazaki29
Estimated H-index: 29
(Hokkaido University)
+ 3 AuthorsYoshinori Furukawa23
Estimated H-index: 23
(Hokkaido University)
Ice-binding proteins (IBPs) affect ice crystal growth by attaching to crystal faces. We present the effects on the growth of an ice single crystal caused by an ice-binding protein from the sea ice microalga Fragilariopsis cylindrus ( fc IBP) that is characterized by the widespread domain of unknown function 3494 (DUF3494) and known to cause a moderate freezing point depression (below 1 °C). By the application of interferometry, bright-field microscopy, and fluorescence microscopy, we observed th...
Published on Jul 5, 2018in Crystal Growth & Design4.15
Ken Nagashima9
Estimated H-index: 9
(Hokkaido University),
Gen Sazaki29
Estimated H-index: 29
(Hokkaido University)
+ 2 AuthorsYoshinori Furukawa23
Estimated H-index: 23
(Hokkaido University)
Surfaces of ice have attracted considerable attention as “reaction sites” where atmospheric gases cause various chemical reactions in nature. Hence, revealing the uptake mechanism of atmospheric gases on/in ice remains an experimental challenge. Here we show the direct observation of ice crystal surfaces by advanced optical microscopy in the presence of hydrogen chloride (HCl) gas, which triggers a series of chemical reactions that cause ozone depletion. We found that the HCl gas induced the app...
Published on Apr 4, 2018in Crystal Growth & Design4.15
Dmitry A. Vorontsov2
Estimated H-index: 2
(Hokkaido University),
Gen Sazaki29
Estimated H-index: 29
(Hokkaido University)
+ 3 AuthorsYoshinori Furukawa23
Estimated H-index: 23
(Hokkaido University)
The morphology and growth kinetics of ice single crystals in aqueous solutions of type III antifreeze protein (AFP-III) have been studied in detail over a range of AFP-III concentrations and supercoolings. In pure water, the shape of ice crystals changes from the circular disklike to planar dendritic with increasing supercooling. In AFP-III solutions, ice crystals in the form of faceted plates, irregular dendrites with polygonized tips, and needles appear with increasing supercooling and AFP-III...
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