Pore sizes and directionality in microcapillaries from angular double-pulsed-field-gradient NMR

Darya Morozov, Leah Bar, Nir Sochen, Yoram Cohen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Angular double-pulsed-field gradient (d-PFG) MR methodology is increasingly used to non-invasively obtain pore sizes in opaque chemical and biological systems. In such MR experiments, the angular dependency of the signal at zero mixing time, through modeling, can be used to extract the pore size. In many systems not only the pore sizes but also their directions are of importance. Before applying d-PFG NMR to complex systems, it is of value to challenge the ability of the methodology to extract these microstructural parameters in samples where the ground truth is known. In the present study we explored whether modeling of the signal in angular d-PFG NMR experiments at zero mixing time, can simultaneously provide the size and the direction of tilted compartments with little prior knowledge. We showed that the angular d-PFG MR methodology enables simultaneous extraction of the pore size and the direction of mono-dispersed phantoms and of phantoms where the restricted compartments have different pore sizes. However, we found that in phantoms with two or more pore sizes, only averaged pore sizes were extracted for large azimuthal and polar angles.

Original languageEnglish
Pages (from-to)105-115
Number of pages11
JournalMicroporous and Mesoporous Materials
StatePublished - 1 May 2016


FundersFunder number
United States - Israel Binational Science Foundation
Ministry of Science, Technology and Space
United States-Israel Binational Science Foundation171/13
Ministry of Science and Technology, Taiwan


    • Diffusion NMR
    • Double-pulsed-field-gradient (d-PFG)
    • Microcapillaries
    • Pore direction
    • Pore size


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