Konstruktion und Test eines Gradientensystems für NMR‐Diffusionsuntersuchungen in Grenzflächensystemen |
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| Authors: | Stefan Schlayer Dr. Frank Stallmach Carsten Horch Tobias Splith Anne‐Kristin Pusch Frederike Pielenz Mikulás Peksa |
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| Affiliation: | Universit?t Leipzig, Institut für Experimentelle Physik I, Linnéstra?e 5, 04103 Leipzig, Deutschland |
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| Abstract: | A z‐gradient system for NMR diffusion measurements with intensive pulsed field gradients was redesigned. The gradient field of an actively screened gradient coil was optimized using finite element analysis. The gradient system was constructed with glass ceramic as coil support material. It does not show any background 1H NMR signal and has a high current‐to‐gradient conversion factor of 0.37 T m–1A–1. The functionality of the system for studying slow diffusion processes in interface systems is demonstrated by observing isotropic and anisotropic diffusion in aqueous solutions of a PEO‐PPO‐PEO triblock copolymer and of methane in two different microporous crystalline absorbencies. |
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| Keywords: | Feldgradienten‐NMR Gradientenspule Methan Selbstdiffusion Gradient coil Methane Pulsed field gradient NMR Self‐diffusion |
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