Dr. rer. nat. Christian Wiktor

Post-Doc

Room: PB-A 409/2
Phone: +49 271 740-4111
Fax: +49 271 740-2545
Em@il: christian.wiktor(at)uni-siegen.de 

Web: Researchgate

Address: Universität Siegen
Department Maschinenbau
Research Group for Micro- and Nanoanalytics & -tomography 
Paul-Bonatz-Strasse 9-11
57076 Siegen

Christian Wiktor obtained a Diploma in Chemistry (Macromolecular Chemistry) from the University of Cologne in 2009. His PhD studies at the EMAT institute at the University of Antwerp and the chair for Inorganic Chemistry II at the University of Bochum (2010-2014) were focused on the characterization of metal-organic frameworks (hybrid inorganic-organic porous coordination polymers) and other porous materials via advanced transmission electron microscopy (TEM). Due to the susceptibility of the materials to the high energy electrons utilized in TEM and their complex structure and composition, it was necessary to apply and adapt a wide array of different TEM techniques.
The first postdoctoral stay at the Canadian Centre for Electron Microscopy in Hamilton, Canada (2015-2016), was devoted to a study of a Lithium transition metal oxide. Modern battery materials are commonly susceptible to the electron beam as well and can feature intriguingly complex crystal structures and elemental compositions. These challenges were ideally suited to gain insight into the field of battery materials, but also to deepen the understanding of crystallography and electron energy loss spectroscopy.

The focus of the second postdoctoral stay at the Friedrich-Alexander Universität Erlangen-Nürnberg in Erlangen, Germany (2016-2018), was focused on in situ TEM studies of dynamic processes in solid state metal thin films at elevated temperatures. Time resolved observations of changing properties in in situ microscopy studies allows insights into processes which are otherwise unobtainable in ex situ experiments. The challenge of revealing these information can only be addressed by an automated script based evaluation of analytical data.

In Siegen, the experience with sensitive, complex materials is applied to new battery materials in situ experiments to gain insight into their structure and aging mechanisms. This knowledge will contribute to the design of new materials and batteries.