Bernd KabiusScientist, WR Wiley Environmental Molecular Sciences Laboratory, Interface Spectroscopy/Diffraction
http://emslbios.pnl.gov/id/kabius_bc Updated: March 25, 2011
Current Activities and Projects
Dr. Kabius has more than 25 years of experience with the microstructural investigation of interfaces and defect structures in high-Tc superconductors, oxides and semiconductors.
One of the major goals of these atomic level studies is to understand macroscopic properties such as critical current densities in superconductors and tunneling behaviour of thin oxide layers.
Most of the TEM studies in the past were ex-situ experiments. In-situ TEM experiments have been performed for decades but they were limited by electron optical constraints. Aberration correction removes these obstacles and enables many in-situ experiments to be performed with better resolution and under realistic conditions such as liquid or gaseous environment. Integrate these new electron optical systems with in-situ instrumentation and applying these new abilities to EMSL specific topics such as catalysis and interface problems will be the goal for the near future.
1. Correlation between defect and interface structure and electrica and chemical properties in nanoscaled structures
2. Development of in-situ instrumentation
3. Application of spherical and chromatic aberration correction on material science problems
4. Interface analysis of oxide thin film heterostructures and correlation of microstructure and local chemistry to macroscopic properties
From 1988 to 1999: Scientist at the research center Jülich in Germany in the institute of solid state physics. Defect and grain boundary structure investigations of high Tc-superconductors and their relation to macroscopic transport properties were the material science topics. High-resolution imaging, image simulation and energy dispersive X-ray analysis have been used for the microstructural characterization.
From 1996 to 1997: 9 month sabbatical in Dr Haider’s group at the EMBL Heidelberg, Germany, where the first successful aberration correction project took place. First applications of aberration correction to material science problems were performed demonstrating a significant gain in interpretability of TEM high-resolution micrographs.
From April 1999 to June 2001: Dr Kabius joined LEO Elektronenmikroskopie Gmbh as a material scientist and product manager. Methods: electron energy-loss spectroscopy and electron energy-loss imaging.
From July 2001 to August 2010: Principal investigator in the Electron Microscope Center at Argonne National Laboratory. Scientific interests were focused on the elemental composition at interfaces in oxide heterostructures and diamond thin films. The EMC participated in the TEAM project where Dr Kabius was leading the development of chromatic aberration. First experiments with chromatic and spherical corrections were performed in 2008 and 2009 demonstrating the benefits of this method for elemental mapping at oxide interfaces and for tomography of thick biological sections.
- Applying spherical aberration correction for Lorentz microscopy
- Three dimensional chemical imaging.
Since September 2010: Senior Scientist in the electron microscopy group at the EMSL, Pacific Northwest national Laboratory.
1976-1983 Material science in Erlangen-Nürnberg
1982-1983 Diploma thesis at the chair for corrosion and surface technology of Prof. Dr. H. Kaesche : "Investigation of localized corrosion of Incoloy 800"
October 1983 -
July 1988 Graduation at the chair for corrosion and surface technology of Prof. Dr. H. Kaesche : "Investigation of the selective corrosion of copper-palladium-alloys"