Seydel Tilo, Wiegart Lutz, Juranyi Fanni, Struth Bernd, Schober Helmut
Institut Max von Laue-Paul Langevin, Boîte Postale 156, F-38042 Grenoble Cedex 9, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Dec;78(6 Pt 1):061403. doi: 10.1103/PhysRevE.78.061403. Epub 2008 Dec 18.
Adequate clay minerals considerably affect the macroscopic mechanical behavior of water even at concentrations of a few percent. Thus when 2 wt. % laponite clay mineral nanoparticles are added to water, the resulting colloidal suspension after some time takes on the semisolid characteristics of a jellylike material at room temperature. Cold neutron time-of-flight spectroscopy data are in agreement with the assumption that notwithstanding this macroscopic change, the mobility of the water molecules on intermolecular and intramolecular length scales remains largely unaffected. This observation is discussed in the context of the properties and the role of water in different more or less dilute ionic environments. The result contributes to the ongoing debate of the properties and role of water in living cells.
即使在浓度仅为百分之几时，适量的粘土矿物也会对水的宏观力学行为产生显著影响。因此，当向水中添加2 wt.%的锂皂石粘土矿物纳米颗粒时，经过一段时间后，所得的胶体悬浮液在室温下呈现出类似果冻状材料的半固体特性。冷中子飞行时间光谱数据与以下假设一致：尽管发生了这种宏观变化，但水分子在分子间和分子内长度尺度上的流动性在很大程度上仍未受到影响。这一观察结果在不同程度稀释的离子环境中，结合水的性质和作用进行了讨论。该结果有助于正在进行的关于水在活细胞中的性质和作用的辩论。
