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Updated: Jul 18, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
Published on: September 2, 2016
Application of a portable nuclear magnetic resonance surface probe to porous media
Andriy Marko1, Bernd Wolter, Walter Arnold
1Fraunhofer Institute for Non-Destructive Testing (IZFP), Building E 3.1, University, D 66123 Saarbrücken, Germany.
Abstract:
A portable nuclear magnetic resonance (NMR) surface probe was used to determine the time-dependent self-diffusion coefficient D(t) of water molecules in two fluid-filled porous media. The measuring equipment and the inhomogeneous magnetic fields in the sensitive volume of the probe are described. It is discussed how to evaluate D(t) using a surface probe from the primary and stimulated echoes generated in three-pulse experiments. Furthermore, the evaluation of D(t) allows one to determine the geometrical structure of porous materials.
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