Water dynamics in mesoporous with periodically alternating surface interaction
Liquid water in confined geometry has been extensively studied, and its dynamics is largely determined by the chemical nature of the confining nanoporous materials. Our aim is to make use of this phenomenon in order to tune the interfacial mobility of nanoconfined water from a spatial modulation of the surface-water interaction. In a previous experiment (6-07-34, IN5, 14-17 Sept. 2018), we have initiated a project at ILL on the dynamics of liquid water confined in Periodic Mesoporous Organosilicas (PMOs). The rationale of the project relies on our capability to design nanochannels that exhibit a periodic successions of hydrophobic and (weakly or highly) hydrophilic units, which are perfectly localised along the pore at the molecular scale. Albeit the unforeseen stop of the experiment after 48 hours (due to a chopper failure) and the short delay between the experiment completion and the deadline for proposal application, we could conduct a complete reduction of the data and preliminary fits of the results. We formulated first conclusions about the water dynamics in PMOs, which underline the prime interest to extend our study towards longer timescale and partially filled samples.
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MORINEAU Denis; APPEL Markus; BUSCH Mark; Bernhard Frick; FROEBA Michael; HUBER Patrick; JANI and OLLIVIER Jacques. (2019). Water dynamics in mesoporous with periodically alternating surface interaction. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-07-45
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