Neutron reflectivity study of size-dependent sorption of molecules by graphene oxide multilayers.
The project suggests to study sorption of molecules with different size by graphene oxide films (GO) exposed to solutions in polar solvents (D2O or d-ethanol). Experiments will be performed using solid-liquid interface cell available at SUPERADAM and designed for Si blocks 50x50x10 mm size. Neutron reflectivity method allows to evaluate swelling of GO films (change in the film thickness) in polar solvent and, simultaneously, composition of sorbed solution. If the size of dissolved molecule exceeds size of "pore" formed by graphene oxide layers in solvent-swelled state, it is expected that only pure solvent will be adsorbed by the film. Smaller molecules are expected to penetrate into inter-layer space of GO structure in either hydrated (solvated) or de-hydrated (de-solvated) state. Using deuterium substituted solvent and organic molecules with different sizes (mostly sugars) we expect to find experimentally the "cut off" size of molecules which defines permeation/not permeation condition for GO membranes.
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TALYZIN ALEXANDR; IAKUNKOV Artem; KLECHIKOV Alexey and NORDENSTROM Andreas. (2020). Neutron reflectivity study of size-dependent sorption of molecules by graphene oxide multilayers.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-499
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