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Stepisnik, J. ; Fritzinger, B. ; Scheler, U. ; Mohoric, A.
Self-diffusion in nanopores studied by the NMR pulse gradient spin echo

NMR pulse gradient spin echo is the most efficient method for non-invasive elucidation of molecular transport in heterogeneous media. With a proper interpretation of experimental data, the method can also be applied to investigate molecular self-diffusion in pores small enough that the characteristic diffusion times are much shorter than time, needed to build up the spin phase structure by the pulse of magnetic field gradient. This is demonstrated by the analysis of restricted self-diffusion measurement of water molecules trapped in a polyamide membrane. The results are presented as a distribution of spin-relaxation rates and pore sizes in this nanoporous system that also present the method in its true colors as a useful tool in the bio-nanotechology.

epl : a letters journal exploring the frontiers of physics 98, 57009 (4 pp)


Erschienen am
June 2012
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