Nanoscale Dynamics and Transport in Highly Ordered Low-Dimensional Water
| Autor: | Takeshi Yamada, Veronika Grzimek, Ferenc Mezei, Georgios N. Karanikolos, Charitomeni M. Veziri, Moritz Caspar Schlegel, Gerrit Günther, Margarita Russina |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Relaxation (NMR) Dynamics (mechanics) Intermolecular force 02 engineering and technology Neutron scattering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake Adsorption Chemical physics symbols Molecule General Materials Science Physical and Theoretical Chemistry van der Waals force 0210 nano-technology Nanoscopic scale |
| Zdroj: | The journal of physical chemistry letters. 10(20) |
| ISSN: | 1948-7185 |
| Popis: | Highly ordered and highly cooperative water with properties of both solid and liquid states has been observed by means of neutron scattering in hydrophobic one-dimensional channels with van der Waals diameter of 0.78 nm. We have found that in the initial stages of adsorption water molecules occupy niches close to pore walls, followed later by the filling of the central pore area. Intensified by confinement, intermolecular water interactions lead to the formation of well-ordered hydrogen-bonded water chains and to the onset of cooperative vibrations. On the other hand, the same intermolecular interactions lead to two relaxation processes, the faster of which is the spontaneous position exchange between two water molecules placed 3.2-4 A from each other. Self-diffusion in an axial pore direction is the result of those spontaneous random exchanges and is substantially slower than the self-diffusion in bulk water. |
| Databáze: | OpenAIRE |
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