Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, F-13013 Marseille, France.
Univ Lyon, Université Lyon1, Institut Lumière Matière, CNRS, UMR 5306, F-69622 Villeurbanne, France.
Phys Rev Lett. 2018 Jun 29;120(26):263001. doi: 10.1103/PhysRevLett.120.263001.
We report the long-range orientational organization of water using polarization-resolved second harmonic scattering operated in a right-angle configuration. A transition is observed between the neat water orientational organization involving an azimuthal molecular orientation distribution towards a radial molecular orientation distribution when salt is added. These two orientational phases are quantitatively described using a molecular model of the second harmonic scattering response. It is observed that the long-range correlation present in the neat water phase abruptly disappears and is replaced by a shorter range correlation centered around the ions as the salt concentration is increased.
我们报告了使用在直角配置中操作的偏振分辨二次谐波散射来实现的水的长程取向组织。当添加盐时，观察到从涉及朝向径向分子取向分布的方位分子取向分布的纯水分取向组织的转变。使用二次谐波散射响应的分子模型定量描述了这两个取向相。观察到随着盐浓度的增加，纯水分相中存在的长程相关性突然消失，并且被围绕离子的更短程相关性所取代。
