Imaging / Flow NMR
Nuclear magnetic resonance imaging (NMR imaging or MRI) deals with the visualisation of localized properties of materials, objects, and devices. MRI has the special advantage to give non-invasive and non-destructive insights in both transparent and opaque objects. This way, it allows to monitor a variety of material properties inside the object or interest, such as the homogeneity, composition, and dynamics, as well as the temporal change of these properties. more...
The basic idea behind mobile NMR is the development of portable NMR instrumentation, following the principle "Don't bring the sample to the laboratory, but the laboratory to the sample". Based on this simple idea, a variety of specialized mobile NMR applications emerged, which not only allow for NMR in badly accessible locations, but also deliver an amount and quality of information hardly accessible or even inaccessible with high-field NMR. more ...
Solid State NMR
Solid state NMR represents one of the most versatile and powerful analytical tools for the characterisation of solid, cristalline, and, in particular, amorphose materials such as polymers. Information about the chemical structure, the local and global chain dynamics, phase composition, domain sizes, morphology, and more can be obtained without the need of further preparation of the sample. These measurements are facilitated by special hardware that enables analysis of samples either without motion or with spinning at the “magic angle” (MAS).
Some of the research topics of our group are ...
Morphology and chain dynamics of polymer materials including polyolefins, nanocomposites, and biomaterials.
Structural characterisation of soil, inorganic materials, and composite systems.
Morphology of semicrystalline polymers by high- and low-field NMR.
Development of NMR techniques for monitoring morphological changes of polymer materials during aging.
Improvement of spin-diffusion experiments to reliably estimate domain sizes in heterogeneous polymer systems.
Ultra Low-Field NMR
Currently, the focus of our research lies in studying the physics of strongly coupled spins at very low magnetic fields (10-4
T) and in the exploration of new mechanisms of the transfer of spin order and spin polarization. Another current topic under investigation is the future of structure determination via high-resolution nuclear magnetic resonance and the question, whether only an extreme low magnetic field (10-7
T) or no magnetic field at all is sufficient.
Further emphasis is placed on the development of mobile NMR spectrometers. The main directive is the development of compact and homogeneous electromagnets and the exploration and implementation of new detection methods in nuclear magnetic resonance. Mobile NMR technology is closely related to hyperpolarization technology (SEOP, PHIP, SPINOE), which is becoming more compact and efficient and can produce large nuclear spin polarizations even in the abscence of a magnetic field.