Research group Heitjans

Phenomena and Properties

• dynamical and kinetic processes in solids
• diffusion and transport phenomena on atomic scale
• local atomic and electronic structure in solids, local disorder effects
• interfaces in solids
• defect properties
• dimensionality of ionic motion (hexagonal vs cubic LixTiS2: 2D vs 3D)
• mechanochemical phenomena
• heterogeneous catalysis
• mixed alkali effect in glasses
  
  

Materials

• nanocrystalline materials, ceramics, composite materials (CaF2, Li2O:X2O3 (X = Al, B), etc.)
• glassy and crystalline ionic conductors (LiNbO3, lithium alumosilicates, etc.)
• intercalation compounds, layered structures (Li3N, hexagonal and cubic LixTiS2, LiC6, etc.)
• intermetallic compounds (LiAl, etc.)
• monoconducting polymer electrolytes
• photocatalysts (TiO2)
  
  

Methods

• nuclear magnetic resonance (NMR) spectroscopy:
  • spin-lattice relaxation in laboratory and rotating reference frames
  • lineshape analysis
  • static and pulsed field gradient spectroscopy (SFG/PFG)
  • spin-alignment echo (SAE) NMR for the detection of ultra-slow Li motions
• β-radiation detected NMR (β-NMR) after neutron capture
• AC impedance spectroscopy in the low-frequency and radiofrequency regime
• quasi-elastic neutron scattering (QENS)
  
  

Sample Characterization

• X-ray diffraction (XRD)
• scanning electron microscopy (SEM)
• transmission electron microscopy (TEM)
• differential thermoanalyis (DTA)
• infrared spectroscopy (IR)
• surface area analysis by nitrogen adsorption

• Institute for Theoretical Physics, University of Giessen
• Institute for Solid State Research, Forschungszentrum Jülich
• Berlin Neutron Scattering Center, Hahn-Meitner-Institut Berlin
• Institute of Mineralogy, University of Hannover
• Institute for Technical Chemistry, University of Hanover Working Group Prof. Dr. D. Hesse
• Institute of Energy Technology, Technical University Berlin
• German Institute for Rubber Technology, Hanover
• Institute of Physical Chemistry, University of Münster
• Materials Group, Dept. Physics, University of Wales, Aberystwyth, UK Dr. R. Winter. Prof. Dr. N. Greaves
• Institute for Inorganic Chemistry, University of Kiel Working Group Prof. Dr. W. Bensch
• Institute for Inorganic Chemistry, University of Hannover Working Group Prof. Dr. M. Binnewies
• Institute for Theoretical Chemistry, University of Bonn Working Group PD Dr. T. Bredow
• Institute for Physical Chemistry, University of Braunschweig Working Group Prof. Dr. K. D. Becker
• SERC Daresbury Laboratories, UK, Dr. A. Dent.
• Institute of Physical Chemistry, RWTH Aachen University Prof. Dr. M. Martin, Dr. R. De Souza
• Chair of Technical Chemistry, Ruhr-Universität Bochum Prof. Dr. W. Grünert