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Predictions of pulsed field gradient NMR echo-decays for molecules diffusing in various restrictive geometries. Simulations of diffusion propagators based on a finite element method

In English

Författare

Summary, in English

Pulsed field gradient NMR diffusometry is a promising tool for investigating structures of porous material through determinations of dynamic displacements of molecules in porous systems. A problem with this approach is the lack of closed analytical expressions for echo-decays in anything but idealized pore geometries. We present here an approach based on calculating the appropriate diffusion propagator by means of finite element calculations. The suggested method is quite general, and can be applied to arbitrary porous systems. The protocol for the calculations is outlined and we show results from some different cases: diffusion in confined geometries and in systems that are spatially inhomogeneous with respect to concentration.

Publiceringsår

2003

Språk

Engelska

Sidor

138-147

Publikation/Tidskrift/Serie

Journal of Magnetic Resonance

Volym

161

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Academic Press

Ämne

  • Physical Chemistry

Nyckelord

  • Simulation
  • Finite element method
  • Propagator
  • Diffusion
  • Pulsed field gradient NMR

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1096-0856