Freezing water in no-man's land

被引：166

作者：

Manka, Alexandra ^{[2
]}

Pathak, Harshad ^{[1
]}

Tanimura, Shinobu ^{[1
]}

Woelk, Judith ^{[2
]}

Strey, Reinhard ^{[2
]}

Wyslouzil, Barbara E. ^{[1
,3
]}

机构：

[1] Ohio State Univ, William G Lowrie Dept Chem & Biomol Engn, Columbus, OH 43210 USA

[2] Univ Cologne, Inst Phys Chem, D-50939 Cologne, Germany

[3] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 13期

基金：

美国国家科学基金会;

关键词：

HOMOGENEOUS ICE NUCLEATION; SUPERCOOLED WATER; TEMPERATURE-DEPENDENCE; INFRARED-SPECTRA; LIQUID WATER; CUBIC ICE; CONDENSATION; PHASE; RATES; H2O;

D O I：

10.1039/c2cp23116f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report homogeneous ice nucleation rates between 202 K and 215 K, thereby reducing the measurement gap that previously existed between 203 K and 228 K. These temperatures are significantly below the homogenous freezing limit, T-H approximate to 235 K for bulk water, and well within no-man's land. The ice nucleation rates are determined by characterizing nanodroplets with radii between 3.2 and 5.8 nm produced in a supersonic nozzle using three techniques: (1) pressure trace measurements to determine the properties of the flow as well as the temperature and velocity of the droplets, (2) small angle X-ray scattering (SAXS) to measure the size and number density of the droplets, and (3) Fourier Transform Infrared (FTIR) spectroscopy to follow the liquid to solid phase transition. Assuming that nucleation occurs throughout the droplet volume, the measured ice nucleation rates J(ice,V) are on the order of 10(23) cm(-3) s(-1), and agree well with published values near 203 K.

引用

页码：4505 / 4516

页数：12

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