Porous materials at nanoscale - a neutron scattering insight

DIPC Seminars

Margarita Russina, Helmholtz Zentrum Berlin für Energie und Materialien, Berlin, Germany
Online seminar, Donostia International Physics Center
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Porous materials at nanoscale - a neutron scattering insight Neutron scattering is a powerful, non-destructive probe for the investigation of structure and dynamics in matter in a broad space and time domain. The wavelengths and energies of thermal and cold neutrons are ideally matched to the microscopic and nanoscopic length and energy scales of processes that underpin technological use of materials ranging from semiconductors to magnetic devices, from hydrogen storage materials to biological matter and polymers. In my talk I will shortly introduce the basics of neutron scattering and will present examples of results related to the investigation of novel porous, which are aimed for use in modern technologies. Using neutron scattering we have discovered that nanoconfinement can create effects similar to pressure, which can be regulated by geometrical pore properties. On one hand, it can lead to very different behavior of the adsorbed phase ranging from enhanced mobility to a complete structural arrest and the formation of new structural phases. On the other hand, this effect can lead to reversible changes of the host material structure. We observe these changes not only in 'soft' porous materials such as metal organic frameworks, but also in 'hard'ones as zeolites and even carbon. Regulated by guest-host interactions these nanomechanical effects can be used for future development of nanodevices, novel drug transport and etc. Host: Arantxa Arbe ZOOM: