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NMR magnetization transfer as a tool for characterization of nanoporous materials
KTH, Superseded Departments, Chemistry.ORCID iD: 0000-0002-0231-3970
2003 (English)In: Magnetic Resonance Imaging, ISSN 0730-725X, E-ISSN 1873-5894, Vol. 21, no 04-mar, 299-303 p.Article in journal (Refereed) Published
Abstract [en]

The application of nuclear magnetic resonance magnetization transfer experiments to probe the surface-to-volume ratio and pore morphology of porous materials with characteristic pore sizes of 1-100 nm is described. The method is based on the phenomenon of incomplete freezing of liquids in small pores where a few monolayers adjacent to the pore walls remain liquid. Sufficient difference between the transverse relaxation times in the solid frozen core and liquid surface layer allows the initial preparation and subsequent re-equilibration of a solid-liquid magnetization grating. The method is demonstrated using model nanoporous materials with known characteristics. The ensuing problems of the mechanism of the magnetization transfer through the interface and within the frozen core are discussed and elucidated by pulsed-field-gradient NMR experiments.

Place, publisher, year, edition, pages
2003. Vol. 21, no 04-mar, 299-303 p.
Keyword [en]
nanoporous materials, magnetization transfer, pulsed-field-gradient NMR, pfg nmr, diffusion, resonance
URN: urn:nbn:se:kth:diva-22674ISI: 000184205700022OAI: diva2:341372
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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