Methods

Self-diffusion measurement by a mobile single-sided NMR sensor with improved magnetic field gradient

A simple and fast method of measuring self-diffusion coefficients of protonated systems with a mobile single-sided NMR sensor is discussed. The NMR sensor uses a magnet geometry that generates a highly flat sensitive volume where a strong and highly uniform static magnetic field gradient is defined. Self-diffusion coefficients were measured by Hahn- and stimulated echoes detected in the presence of the …

Self-diffusion measurement by a mobile single-sided NMR sensor with improved magnetic field gradient Read More »

Advances of unilateral mobile NMR in nondestructive materials testing

Unilateral mobile NMR employs portable instrumentation with sensors, which are applied to the object from one side. Based on the principles of well-logging NMR, a hand-held sensor, the NMR-MOUSE (MObile Universal Surface Explorer) has been developed for nondestructive materials testing. In the following, a number of new applications of unilateral NMR in materials science are …

Advances of unilateral mobile NMR in nondestructive materials testing Read More »

Velocity distributions remotely measured with a single-sided NMR sensor

The pulsed field gradient nuclear magnetic resonance (PFG NMR) method has proved to be a powerful non-invasive technique to measure molecular displacement in various systems. It has been largely implemented with conventional NMR magnets where the volume for housing the flow setup is restricted. In this work we present the first approach to measure velocity distributions ex situ implementing a pulsed field …

Velocity distributions remotely measured with a single-sided NMR sensor Read More »

NMR for Process Control. Imaging and Localized NMR in Soft Matter

NMR or nuclear magnetic resonance is a spectroscopic method which employs magnetic fields and radio-frequency waves. In chemistry it is a standard method for structural analysis, but it is also known in medicine as magnetic resonance tomography which is a well-established diagnostic imaging method. Its success in medical imaging derives from the comparatively high sensitivity …

NMR for Process Control. Imaging and Localized NMR in Soft Matter Read More »

Die NMR-Maus

Während die Kernspintomographie in der medizinischen Diagnostik einen festen Platz hat, ist ihr Einsatz in der Materialforschung noch relativ unbekannt. Dennoch bietet sie im Bereich der Kunststoffe und des Stofftransports vielfältige Anwendungsmöglichkeiten und kann zusätzliche Information zu etablierten Methoden der zerstörungs‐freien Materialprüfung liefern [1]. An dem neu eingerichteten Zentrum für Magnetische Resonanz der RWTH‐Aachen wurde …

Die NMR-Maus Read More »

Die NMR-Maus

Während die Kernspintomographie in der medizinischen Diagnostik einen festen Platz hat, ist ihr Einsatz in der Materialforschung noch relativ unbekannt. Dennoch bietet sie im Bereich der Kunststoffe und des Stofftransports vielfältige Anwendungsmöglichkeiten und kann zusätzliche Information zu etablierten Methoden der zerstörungs‐freien Materialprüfung liefern [1]. An dem neu eingerichteten Zentrum für Magnetische Resonanz der RWTH‐Aachen wurde …

Die NMR-Maus Read More »