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Pore size distribution mapping

J H Strange1, J B Webber, S D Schmidt

  • 1Physics Laboratory, The University, Canterbury, Kent, UK.

Magnetic Resonance Imaging
|January 1, 1996
PubMed
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Nuclear Magnetic Resonance (NMR) cryoporometry with magnetic field gradients enables non-destructive pore size distribution mapping. This technique provides detailed 3D pore size information within bulk samples.

Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Physics

Background:

  • Pore size distribution is critical for understanding material properties.
  • Existing methods for pore characterization can be destructive or limited in scope.
  • Non-destructive techniques are highly desirable for in-situ analysis.

Purpose of the Study:

  • To demonstrate pore size distribution mapping using NMR cryoporometry.
  • To extend this method to 2D and 3D spatial mapping.
  • To provide a non-destructive approach for characterizing nanopores.

Main Methods:

  • Utilized Nuclear Magnetic Resonance (NMR) cryoporometry.
  • Employed a magnetic field gradient to spatially resolve measurements.
  • Analyzed the freezing point depression of pore-filling liquids.

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Main Results:

  • Successfully mapped pore size distributions within a bulk sample.
  • Demonstrated the capability for 2D and 3D pore mapping.
  • Achieved pore size characterization in the range of 3 to 100 nm.

Conclusions:

  • NMR cryoporometry with magnetic field gradients is a viable technique for pore size mapping.
  • This method offers a non-destructive way to obtain detailed pore structure information.
  • The technique is extendable for comprehensive 3D pore characterization.