HZDR Research Talks

The HZDR Research Talks usually take place on Wednesdays from 1:00 to 2:00 p.m.

The next dates are:

March 17, 2021 "Transmission electron microscopy for the characterization of nanoscale materials"

by Dr. René Hübner (Structural Analysis)

Understanding the physical and chemical properties of various materials demands detailed knowledge about their shape, structure, and composition. Particularly for nanoscale materials, characterization methods with high spatial and analytical resolution are required. Due to the small wavelength of strongly accelerated electrons, transmission electron microscopy (TEM) is one of the most appropriate nanoscale analysis techniques. Moreover, due to the tremendous range of signals arising from electron-solid interaction, a broad range of analysis modes are nowadays available in a transmission electron microscope.
After introducing the advantages of TEM, the basic setup of a transmission electron microscope, and the equipment available at HZDR for performing TEM analyses, the most important modes of imaging are presented, including bright-field, dark-field, and high-resolution imaging in TEM and scanning TEM (STEM) mode. It is shown, how diffraction analysis is used to derive structure and orientation information, while energy-dispersive X-ray spectroscopy (EDXS) and electron energy-loss spectroscopy (EELS) are applied for chemical composition analysis. Using examples from various research and application fields, including e.g. information technology, resource ecology, and radiopharmacy, the various TEM analysis modes are illustrated, and their combination is shown to be essential for a comprehensive understanding of nanoscale materials.

The HDZR Research Talks are a program for HZDR employees of all research fields. Within this framework, scientists give lectures on current projects, methods and procedures and look forward to exchanging ideas with colleagues in order to jointly develop ideas and initiate projects. The Research Talks are also open to external interested parties.

• Lectures and discussions are held in English.
• Participation is free of charge.
• Registration is not required. External visitors need to check in at the HZDR main entrance 30 min in advance.

Initiator:
Dr. Franziska Lederer (Helmholtz Institute Freiberg for Resource Technology, Dept. Biotechnology)
Phone: +49 351 260 2427
E-Mail: f.lederer@hzdr.de

Co-organizers:
Dr. Kristof Zarschler (Institute of Radiopharmaceutical Cancer Research, Dept. Radionuclide Theragnostics)
Phone: +49 351 260 3678
E-Mail: k.zarschler@hzdr.de

Dr. Peter Zahn (Institute of Ion Beam Physics and Materials Research, Dept. Scaling Phenomena)
Phone: +49 351 260 3121
E-Mail: p.zahn@hzdr.de

Dr. Björn Drobot (Institute of Resource Ecology, Dept. Biogeochemistry)
Phone: +49 351 260 2759
E-Mail: b.drobot@hzdr.de

Dr. Sandra Hamann (Research Programmes and International Projects)
Phone: +49 351 260 3649
E-Mail: s.hamann@hzdr.de

Past lectures:

• Dr. Nina Elkina (IT - Infrastructure) "HPC and Numerics at HZDR" PW:RTElkina
• Dr. Michael Bussmann (CASUS) "The Digitalization of Science: Are we there, yet?" PW:RTBussmann
• Dr. Katerina Falk (Institute of Radiation Physics, High Energy Density) "Ultra-fast x-ray probing of astrophysical plasmas" PW: RTFalk
• Dr. Richard Gloaguen (Helmholtz Institute Freiberg for Resource Technology, Exploration): "From satellites to drones: imaging Earth with innovative technologies"
• Dr. Josefine Metzkes-Ng (Institute of Radiation Physics, Application-oriented Laser-plasma Accelerators):  "Laser-driven ion accelerators for applications in radiobiology"
• Dr. Sebastian Reinecke (Institute of Fluid Dynamics, Experimental Thermal Fluid Dynamics): "Methods for more efficiency in water resource recovery"
  
• Dr. Björn Drobot (Institute of Resource Ecology, Biogeochemistry): "What we can learn from the ’f’ in f-elements"
• Dr. Dominik Kraus ( Institute of Radiation Physics, Helmholtz Young Investigator Group High Energy Density): "Warm dense matter: investigating planets and stars in the laboratory"
• Dr. Yordan Georgiev (Institute of Ion Beam Physics and Materials Research, Transport Phenomena in Nanostructures, Head of Nanofabrication): "Ultra sensitive biosensors based on the simplest possible field effect transistor"
• Dr. Matthias Streller (Communication & Media Relations): "The DeltaX student laboratory – a place of research and education"
• Prof. Dr. Heidemarie Schmidt (Institute for Solid State Physics, Friedrich Schiller University Jena): "Adhesion of biomolecules to a CHIP using surface-near electrostatic forces"
• Dr. Elke Beyreuther (Institute of Radiation Physics, Laser Particle Acceleration): "Radiobiological effect dependencies on proton beam quality revealed by zebrafish embryo"
• Dr. Nicole Matschiavelli (Institute of Resource Ecology, Biogeochemistry): "The disposal of high-level radioactive waste – some microbial issues"
• Dr. Kristof Zarschler (Institute of Radiopharmaceutical Cancer Research, Radionuclide Theragnostics): "How to make a radiolabeled protein: a story of protein expression, functionalization and characterization"
• Dr. Gregor Hlawacek (Institute of Ion Beam Physics and Materials Research, Ion Induced Nanostructures): "Helium Ion Microscopy for biological samples: Achievments and Challenges"
• Dr. Franziska Lederer (Helmholtz Institute Freiberg for Resource Technology, Biotechnology): "Development of biological tools for the recycling of electronic scrap"