title: Two-Dimensional Correlation of Isotropic and Directional Diffusion Using NMR.
abstract: Diffusion nuclear magnetic resonance (NMR) is a powerful technique for studying porous media, but yields ambiguous results when the sample comprises multiple regions with different pore sizes, shapes, and orientations. Inspired by solid-state NMR techniques for correlating isotropic and anisotropic chemical shifts, we propose a diffusion NMR method to resolve said ambiguity. Numerical data inversion relies on sparse representation of the data in a basis of radial and axial diffusivities. Experiments are performed on a composite sample with a cell suspension and a liquid crystal.
authors.affiliation: Division of Physical Chemistry, Department of Chemistry, Lund University, 221 00 Lund, Sweden.
authors.forename: João P
authors.initials: JP
authors.lastname: de Almeida Martins
authors.affiliation: Division of Physical Chemistry, Department of Chemistry, Lund University, 221 00 Lund, Sweden.
authors.forename: Daniel
authors.initials: D
authors.lastname: Topgaard