作者：Lirong Zheng, Zhuo Liu, Qiang Zhang*, Song Li, Juan Huang, Lei Zhang, Bing Zan, Madusudan Tyagi,
關鍵字：結合水，動力學，準彈性中子散射
論文來源：期刊
具體來源：Chemical Science DOI: 10.1039/d1sc04650k, 2022
發表時間：2022年
Interfacial water remains liquid and mobile much below 0 C, imparting flexibility to the encapsulated materials to ensure their diverse functions at subzero temperatures. However, a united picture that can describe the dynamical differences of interfacial water on different materials and its role in imparting system-specific flexibility to distinct materials is lacking. By combining neutron spectroscopy and isotope labeling, we explored the dynamics of water and the underlying substrates independently below 0 C across a broad range of materials. Surprisingly, while the function-related anharmonic dynamical onset in the materials exhibits diverse activation temperatures, the surface water presents a universal onset at a common temperature. Further analysis of the neutron experiment and simulation results revealed that the universal onset of water results from an intrinsic surface-independent relaxation: switching of hydrogen bonds between neighboring water molecules with a common energy barrier of 35 kJ mol