THE ROLE OF CRYSTAL POLARITY IN ALPHA-AMINO-ACID CRYSTALS FOR INDUCED NUCLEATION OF ICE

被引：141

作者：

GAVISH, M ^{[1
]}

WANG, JL ^{[1
]}

EISENSTEIN, M ^{[1
]}

LAHAV, M ^{[1
]}

LEISEROWITZ, L ^{[1
]}

机构：

[1] WEIZMANN INST SCI, DEPT MAT & INTERFACES, IL-76100 REHOVOT, ISRAEL

来源：

SCIENCE | 1992年 / 256卷 / 5058期

关键词：

D O I：

10.1126/science.1589763

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The hydrophobic faces of single crystals of a series of pairs of racemic and chiral-resolved hydrophobic alpha-amino acids were used as a substrate, onto which water vapor has been cooled to freezing. The morphologies and molecular packing arrangements within each crystal pair are similar but only one of each pair exhibits a polar axis, parallel to the hydrophobic face exposed to water. Those crystals that have a polar axis induce a freezing point higher by 4-degrees to 5-degrees-C than the corresponding crystals that do not have a polar axis. The results are interpreted in terms of an electric field mechanism that helps align the water molecules into ice-like clusters en route to crystallization.

引用

页码：815 / 818

页数：4

共 45 条

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