| Issue |
J. Phys. IV France
Volume 10, Number PR7, May 2000
International Workshop on Dynamics in Confinement
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|---|---|---|
| Page(s) | Pr7-211 - Pr7-214 | |
| DOI | https://doi.org/10.1051/jp4:2000742 | |
International Workshop on Dynamics in Confinement
J. Phys. IV France 10 (2000) Pr7-211-Pr7-214
DOI: 10.1051/jp4:2000742
1 Dipartimento di Fisica dell'Università & INFM di Messina, C.da Papardo, S.ta Sperone 31, P.O. Box 55, 98166 S. Agata, Messina, Italy
2 Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91197 Gif-sur-Yvette cedex, France
© EDP Sciences 2000
J. Phys. IV France 10 (2000) Pr7-211-Pr7-214
DOI: 10.1051/jp4:2000742
Diffusional and vibrational properties of water confined in very thin nanoporous glasses probed by light and neutron scattering
V. Venuti1, V. Crupi1, S. Magazù1, D. Majolino1, P. Migliardo1 and M.C. Bellissent-Funel21 Dipartimento di Fisica dell'Università & INFM di Messina, C.da Papardo, S.ta Sperone 31, P.O. Box 55, 98166 S. Agata, Messina, Italy
2 Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91197 Gif-sur-Yvette cedex, France
Abstract
Rayleigh-wing, Raman and quasi-elastic neutron scattering data on water confined into nanoporous
glasses (silica 26 Å pores), are presented and discussed. The H-bond among water molecules and Si-OH surface
groups originates strong hydration effects, that induce more stable structural environments in which the memory of
collective modes (the [Math]60 cm-1 and [Math]190 cm-1 shoulders due to the HB bending and HB stretching modes of water)
is lost and the O-H stretching band connected to low-density water tends to disappear. The quasi-elastic neutron
response is explained in terms of two available current models : the Dianoux-Volino model and the MCT model.
© EDP Sciences 2000