时间：3月28日（周五）上午10：00

地点：勤园20-518

报告内容：

Water displays unique thermodynamic and kinetic anomalies that set it apart from ordinary liquids. These distinctive behaviors, particularly under the influence of ions in aqueous solutions, have profound implications for scientific and technological applications. Despite extensive research, the origin of water’s anomalies and the mechanism underlying specific ion effects remain elusive. Through the analysis of experimental data and molecular dynamics simulations, we present compelling evidence for the dynamic coexistence of two structural motifs in liquid water: locally favored tetrahedral structures and disordered normal-liquid structures. Based on this insight, we develop a hierarchical two-state model that captures the cooperative formation of tetrahedral structures. This model provides a unified framework for explaining water’s structural, thermodynamic, and kinetic anomalies, as well as its critical behavior, under varying temperature and pressure conditions. Furthermore, we reveal that the dynamic properties of ionic solutions are primarily governed by the interplay between ion solvation and the tetrahedral ordering of water molecules under the influence of ionic electric fields. We characterize this ion-specific competition and propose a theoretical model that quantitatively explains the concentration- and temperature-dependent experimental data on viscosity and diffusion in various ionic solutions. These findings unify water’s anomalous properties with specific ionic effects in aqueous solutions, offering fundamental insights into ionic processes across physical, chemical, and biological systems.

报告人简介：

石锐，浙江大学物理学院百人计划研究员。2014年在中国科学院理论物理研究所获博士学位，曾任美国能源部埃姆斯国家实验室访问学者、日本东京大学博士后研究员，2020年回国并入选国家高层次海外人才计划。主要运用统计物理、人工智能和计算机模拟等方法，围绕复杂系统的统计理论，尤其是液体物理、非晶物理、生物物理和AI for physics等领域中存在的重大科学问题展开深入研究，同时开展与生命、化学、能源、材料和人工智能等学科的前沿交叉。代表性论文发表在Nature Reviews Physics, Nature Communications, Science Advances, PNAS, JACS 等期刊。