QUASI-ELASTIC NEUTRON-SCATTERING FROM ADSORBED WATER-MOLECULES ON PYROGENIC SILICA SURFACES

Authors
TUMANOV AA ZARKO VI
Citation
Aa. Tumanov et Vi. Zarko, QUASI-ELASTIC NEUTRON-SCATTERING FROM ADSORBED WATER-MOLECULES ON PYROGENIC SILICA SURFACES, Physica. B, Condensed matter, 198(1-3), 1994, pp. 97-99
Citations number
3
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
198
Issue
1-3
Year of publication
1994
Pages
97 - 99
Database
ISI
SICI code
0921-4526(1994)198:1-3<97:QNFAWO>2.0.ZU;2-X
Abstract
Quasielastic neutron scattering (QNS) from hydrated samples of high di spersion (Aerosil) and of porous dioxide silicon was investigated. The broadening of the QNS peak analysis permits one to obtain the effecti ve diffusion coefficient D of adsorbed water molecules. It was obtaine d that the D-value increases with silica hydration. The mean square di splacement of the water molecules from equilibrium [x2] equals approxi mately 0.1 angstrom2 and does not depend on the quantity of adsorbed w ater.