Enhanced self-diffusion of water in restricted geometry
- 3 July 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (1) , 43-46
- https://doi.org/10.1103/physrevlett.63.43
Abstract
Self-diffusion of water contained in a porous glass is observed to be strongly enhanced if the pore space is only partially filled. This can be explained by a novel mechanism involving indirect molecular exchange between the liquid and the vapor phase. A theoretical model fits the pulsed-field-gradient NMR diffusion measurements with no adjustable parameters. NMR relaxation measurements were performed to provide a characterization of the homogeneity of the samples.Keywords
This publication has 6 references indexed in Scilit:
- Application of nuclear magnetic resonance pore structure analysis to porous silica glassJournal of Applied Physics, 1989
- Preparation and Sintering of Colloidal Silica‐Potassium Silicate GelsJournal of the American Ceramic Society, 1988
- NMR Study of Adsorbate Self‐Diffusion in Porous GlassesJournal of the American Ceramic Society, 1983
- Spin Diffusion Measurements: Spin Echoes in the Presence of a Time-Dependent Field GradientThe Journal of Chemical Physics, 1965
- Modified Spin-Echo Method for Measuring Nuclear Relaxation TimesReview of Scientific Instruments, 1958
- Measurements of Vapor Diffusion CoefficientIndustrial & Engineering Chemistry, 1954