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
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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. / Hagslätt, H; Jönsson, Bengt; Nyden, M; Söderman, Olle.
In: Journal of Magnetic Resonance, Vol. 161, No. 2, 2003, p. 138-147.Research output: Contribution to journal › Article
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T1 - 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
AU - Hagslätt, H
AU - Jönsson, Bengt
AU - Nyden, M
AU - Söderman, Olle
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
KW - Simulation
KW - Finite element method
KW - Propagator
KW - Diffusion
KW - Pulsed field gradient NMR
U2 - 10.1016/S1090-7807(02)00039-3
DO - 10.1016/S1090-7807(02)00039-3
M3 - Article
VL - 161
SP - 138
EP - 147
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
SN - 1096-0856
IS - 2
ER -