Synthesis and Real Structure Group

Towards Novel Tools for In Operando TEM: Plasmamodification Live

Niklas Kohlmann


At present, plasma-wall interaction is one of the fastest growing branches in Plasma Physics and Technology and has got a leading position in the field of Applied Surface Sciences. Its basic questions however include the mastering of an old problem: the nanoanalytical examination at the contact of different states of matter. This is where this projects aims to provide novel tools prodiving access and insight into the interaction between plasmas and material surfaces on an atomic scale.

At the heart of the project is the development and characterization of an in situ plasma microcell for integration into a standard TEM holder. This will enable us to study the effects of plasma treatment on various (nano) materials with a focus on tetrapodal, functional nanomaterials. Supplementary there are studies performed using identical location, ex situ techniques enabling the use of a range of different discharges for materials treatment.

Using a vacuum transfer holder material treatment under precisely controlled conditions inside a low presser plasma chamber is made possible.

All available TEM techniques such as HRTEM, ED, HAADF STEM as well as EDX and EELS will be used to determine the effect of plasma treatment on the structure and chemical compositions of the materials. The project aims at pushing the boundaries of in situ TEM as well as the understanding of plasma surface interaction.