Porous materials at nanoscale - a neutron scattering insight
DIPC Seminars
- Speaker
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Margarita Russina, Helmholtz Zentrum Berlin für Energie und Materialien, Berlin, Germany
- When
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2020/11/24
13:00 - Place
- Online seminar, Donostia International Physics Center
- Add to calendar
-
iCal
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: