Deeply-cooled water under strong confinement: neutron scattering investigations and the liquid-liquid critical point hypothesis
Deeply-cooled water under strong confinement: neutron scattering investigations and the liquid-liquid critical point hypothesis
复制标题
DOI：
10.1039/c2cp43235h
复制
发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Chen, Sow-Hsin
中科院分区：
文献类型：
--
作者：
Bertrand, Christopher E.;Zhang, Yang;Chen, Sow-Hsin
我们概述了最近对低于整体冻结温度的强受限水的性质的实验研究。在强约束下，水的结晶被完全抑制，并且可以在大块液体无法接触到的温度和压力下测量受限液体的行为。我们专注于最近在强承压水中发现的两个现象：密度最小和从脆弱到强烈的动态交叉。所有的实验结果似乎都表明，承压水在体相核化极限以下经历了一种独特的转变。最近关于强约束下的深度冷却水的大部分工作都是由液-液临界点(LLCP)假说推动的。我们在各种实验结果的背景下讨论了这一假设。
We present an overview of recent experimental investigations into the properties of strongly-confined water below the bulk freezing temperature. Under strong confinement, the crystallization of water is completely suppressed and the behavior of the confined liquid state can be measured at temperatures and pressures that are inaccessible to the bulk liquid. We focus on two phenomena that have recently been discovered in strongly confined water: the density minimum and the fragile-to-strong dynamic crossover. All experimental results seem to indicate that confined water undergoes a unique kind of transition below the bulk homogeneous nucleation limit. Much of the recent work on deeply-cooled water under strong confinement has been motivated by the liquid-liquid critical point (LLCP) hypothesis. We discuss this hypothesis in the context of the various experimental findings.