Mitra, P. P. (1997) Diffusion in porous materials as probed by pulsed gradient NMR measurements. Physica A: Statistical Mechanics and its Applications, 241 (1-2). pp. 122-127. ISSN 03784371 (ISSN)
Abstract
Due to recent activity involving diffusion measurements using pulsed gradient spin echo techniques, both experimental and theoretical, we now have a better understanding of diffusion of fluid molecules in a large class of natural and artificial porous media. At short times, the restrictions cause deviations from free diffusion that depend only on local properties of the pore-grain interface. This allows quantities such as the time-dependent diffusion coefficient and the return to the origin probability to be calculated exactly, and these results have been experimentally verified. At longer times, diffraction-like effects are observed in the measured momentum-space diffusion propagator, which can be understood in model systems. In general, it is better understood how diffusion measurements may be used to probe the microgeometry of porous media.
| Item Type: | Paper |
|---|---|
| Uncontrolled Keywords: | Diffusion NMR Porous media Short time Interfaces materials Inverse problems Mathematical models Microstructure Nuclear magnetic resonance Porous materials Probability Momentum space diffusion propagator Diffusion in solids |
| Subjects: | physics > fluid dynamics Investigative techniques and equipment > magnetic resonance imaging physics physics > biophysics > pore dynamics |
| CSHL Authors: | |
| Communities: | CSHL labs > Mitra lab |
| Depositing User: | CSHL Librarian |
| Date: | 1997 |
| Date Deposited: | 02 Apr 2012 20:11 |
| Last Modified: | 10 Feb 2017 17:12 |
| URI: | https://repository.cshl.edu/id/eprint/25852 |
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