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PGI-1 Seminar: Dr. Ralf Hambach

Analytical Transmission Electron Microscopy for Graphene-based Systems

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03.Apr.2013 11:30
end
03.Apr.2013 13:00
venue
PGI-Hörsaal

Universität Ulm

Abstract:

By combining the spatial resolution of transmission electron microscopes (TEM) with the analytical power of electron energy-loss spectroscopy (EELS), on can now study electronic excitations of nano-objects at the nanometer scale. At these dimensions, a detailed understanding of the imaging process and the response of the target is only possible in the framework of quantum mechanics.

In the first part of this talk, I will give an overview of the theoretical description of TEM-EELS using either classical electrodynamics or quantum mechanical scattering theory. In the second part, the use of ab-initio calculations and simple dielectric models for the interpretation of EELS experiments in graphene, multilayer systems and single-wall carbon nanotubes will be discussed.

Contact

Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850
email: s.bluegel@fz-juelich.de

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