NMR diffusometry for porous media research


Associate Professor Petrik Galvosas
Associate Investigator


November 5, 2015 - 12:15 pm


November 5, 2015 - 1:00 pm


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Dr Petrik Galvosas
Victoria University of Wellington

Studying molecular motion with Nuclear Magnetic Resonance (NMR) is nearly as old as the discovery of NMR itself [1]. However, with the introduction of so called pulsed magnetic field gradients [2] NMR became a highly versatile tool for studying diffusion and flow in many areas such as physics, chemistry, material science, medical research and clinical routine.

Figure_5                          Untitled

This lecture will revolve around two options offered by NMR diffusometry in the context of porous media research. One option is custom-tailored magnetic fields which allow to track molecular displacements in real time [3,4] and to rapidly characterise porous media via their surface-to-volume ratios [5]. A second option is recent imaging approaches for porous materials. This method is based on the work horse of NMR diffusometry which was introduced 50 years ago [2] but a clever modification [6] makes it an Magnetic Resonance Imaging (MRI) experiment in disguise. This enables Magnetic Resonance Pore Imaging (MRPI) at resolutions well beyond the limits of conventional MRI [7].

[1]          Hahn, E. L. Phys. Rev. 80(4), 580–594, (1950).
[2]          Stejskal, E. O. and Tanner, J. E. J. Chem. Phys. 42, 288 (1965).
[3]          Kittler, W. C., Galvosas, P., and Hunter, M. W. J. Magn. Reson. 244, 46–52, (2014).
[4]          Kittler, W., Hunter, M., and Galvosas, P. Phys. Rev. E 92, 023016 (2015).
[5]          Kittler, W. C., Obruchkov, S., Galvosas, P., and Hunter, M. W. J. Magn. Reson. 247, 42–49, (2014).
[6]          Laun, F. B., Kuder, T. A., Semmler, W., and Stieltjes, B. Phys. Rev. Lett. 107, 048102, (2011).
[7]          Hertel, S. A., Wang, X., Hosking, P., Simpson, M. C., Hunter, M., and Galvosas, P. Phys. Rev. E 92, 012808 (2015).

Victoria University of Wellington, RB901
University of Canterbury, Psychology 164

If you are unable to attend at one of the above locations the seminar can be viewed via Zoom