Supercooling of water confined in reverse micelles
Supercooling of water confined in reverse micelles
复制标题
限制在反胶束中的水的过冷
DOI：
10.1088/0953-8984/20/10/104204
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
B. Stühn
中科院分区：
文献类型：
--
作者：
T. Spehr;B. Frick;I. Grillo;B. Stühn
我们报告的温度依赖性的纳秒时间尺度的动力学的三元混合物水/AOT/油与氘代庚烷，甲苯或癸烷作为油。在这种微乳液中形成的水溶胀反胶束使我们能够研究在软环境中限制水的冻结行为。我们在这里报告的第一个中子散射的研究，其中冻结的承压水和石油的温度下，在整个系统被冻结。我们专注于三种不同液滴尺寸的水的研究：通过小角中子散射，我们已经确定了半径为46，18和7纳米的水与表面活性剂的比例ω = 40，12和3。从中子背散射的弹性温度扫描，我们推断出一个强大的过冷的水限制在反溶胀胶束，随着液滴尺寸的减小而增加。对于最小的液滴，我们发现超过45 K的过冷相比，散装水。
We report on the temperature dependence of the nanosecond-timescale dynamics of the ternary mixture water/AOT/oil with deuterated heptane, toluene or decane as the oil. Water-swollen reverse micelles as formed in such microemulsions allow us to investigate the freezing behaviour of water confined in a soft environment. We report here on the first neutron scattering studies in which the freezing of the confined water and of the oil is followed down to temperatures at which the whole system is frozen. We focus on studies of water confined in three different droplet sizes: by means of small-angle neutron scattering we have determined the radii to be 46, 18, and 7 Å for water to surfactant ratios ω = 40, 12, and 3. From elastic temperature scans by neutron backscattering we deduce a strong supercooling of water confined in the reverse swollen micelles which increases with decreasing droplet size. For the smallest droplets we find a supercooling of more than 45 K compared to bulk water.
反胶束中氢键的温度依赖性和水的冻结行为。
DOI：
10.1021/jp051068
发表时间：
2005
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Nucci,NathanielV;Vanderkooi,JaneM
通讯作者：
Vanderkooi,JaneM