title: Dynamics of water confined in mesoporous magnesium carbonate.
abstract: We have measured the dynamics of water confined in a porous magnesium carbonate material, Upsalite®, using the high-resolution neutron backscattering spectrometer SPHERES. We found quasielastic scattering that does not flatten out up to 360 K, which means that the dynamics of water are much slower than in other matrix materials. Specifically, a single Lorentzian line could be fitted to the quasielastic part of the acquired spectra between 220 and 360 K. This, accompanied by an elastic line from dynamically frozen water present at all experimental temperatures, even above the melting point, signaled a significant amount of bound or slow water.
authors.affiliation: Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85747 Garching, Germany.
authors.forename: Antti J
authors.initials: AJ
authors.lastname: Soininen
authors.affiliation: Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85747 Garching, Germany.
authors.forename: Marie-Sousai
authors.initials: MS
authors.lastname: Appavou
authors.affiliation: Division for Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, 75121 Uppsala, Sweden.
authors.forename: Sara
authors.initials: S
authors.lastname: Frykstrand
authors.affiliation: Division for Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, 75121 Uppsala, Sweden.
authors.forename: Ken
authors.initials: K
authors.lastname: Welch
authors.affiliation: Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85747 Garching, Germany.
authors.forename: Marina
authors.initials: M
authors.lastname: Khaneft
authors.affiliation: German Engineering Materials Science Centre (GEMS) at MLZ, Helmholtz-Zentrum Geesthacht GmbH, Lichtenbergstrasse 1, 85747 Garching, Germany.
authors.forename: Armin
authors.initials: A
authors.lastname: Kriele
authors.affiliation: Laboratoire Léon Brillouin, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: Marie-Claire
authors.initials: MC
authors.lastname: Bellissent-Funel
authors.affiliation: Division for Nanotechnology and Functional Materials, Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, 75121 Uppsala, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Strømme
authors.affiliation: Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Lichtenbergstraße 1, 85747 Garching, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Wuttke