Growth of Ice Crystals in the Presence of Type III Antifreeze Protein
Growth of Ice Crystals in the Presence of Type III Antifreeze Protein
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DOI：
10.1021/acs.cgd.8b00172
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发表时间：
2018-04-01
影响因子：
3.8
通讯作者：
Furukawa, Yoshinori
中科院分区：
文献类型：
--
作者：
Vorontsov, Dmitry A.;Sazaki, Gen;Furukawa, Yoshinori
本文详细研究了在不同浓度和过冷度的AFP-III水溶液中冰单晶的形态和生长动力学。在纯水中，随着过冷度的增加，冰晶的形状从圆盘状转变为平面树枝状。在AFP-III溶液中，随着过冷度和AFP-III浓度的增加，冰晶以多面板的形式出现，不规则的枝晶和针状物出现。冰晶在晶体学a方向的生长速率比c方向的生长速率高2个数量级。AFP-III分子在低过冷度下导致棱柱面和基面生长的停止。当过冷度超过临界值时，AFP-III有利于a和c方向生长的加速。AFP-III的观察到的行为解释Cabrera Vermilyea钉扎模型和从生长的晶体具有不同的形状的潜热耗散的特异性。
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 concentration. The growth rate of ice crystals in the crystallographic a direction is 2 orders of magnitude higher than that in the c direction. AFP-III molecules cause the stoppage of the growth of the prismatic and basal faces at low supercoolings. When supercooling exceeds the critical value, AFP-III favors the acceleration of the growth in both a and c directions. The observed behavior of AFP-III is explained in terms of the Cabrera-Vermilyea pinning model and the specificity of the dissipation of latent heat from the growing crystals with different shapes.