Research

Our research activities concentrate on methodological aspects of state-of-the-art EM, opening routes towards atom-sensitive imaging of nanostructures playing a crucial role in numerous applications in materials research and development.

The interdisciplinary ‘in-situ EM’ research group has expertise in atomic scale scanning / transmission electron microscopy (S/TEM) and in in-situ transmission electron microscopy, environmental transmission electron microscopy (ETEM) in particular.

A theme in our work is the ability to extract structural information at the atomic scale using advanced EM methodologies. Recently our work has focused on the improvement of ETEM, including the development and application of in-situ holders, resulting in the ability to study phase transformations in metals and gas-solid interactions in functional nanomaterials (e.g. automotive catalysts).

See previous research results / figures / images

 

Current projects:

2020.05 – 2021.12

Joerg’s project with Ford Motor has been renewed for another 2 years.

2019.09 – 2020.12

Joerg has been awarded a 2019 Exploratory Materials Research Grant within The Ohio State University Materials Research Seed Grant Program (MRSGP) in support of the research outlined in your proposal entitled “In-situ Characterization of High Temperature Alloy Phase Transformations at the Nanoscale with Simultaneous Enthalpy Quantification”.

2018.06 – 2020.05

Joerg was selected to investigate ‘next generation automotive three-way catalysts” in collaboration with Ford Motor.

2018.08 – 2023.07

Rationalization of Liquid/Solid and Solid/Solid Interphase Instabilities During Thermal-Mechanical Transients of Metal Additive Manufacturing

Joerg was selected to be a collaborator in a Multidisciplinary University Research Initiative (MURI) program for the United States Navy.

The MURI program is led by Suresh Babu, the University of Tennessee-Oak Ridge National Laboratory Governor’s Chair for Advanced Manufacturing. We will focus on properties, defects, and instabilities in advanced manufactured alloys, an area of great importance to the Navy. The team hopes to better explore a number of physical processes that can affect the final product, including rapid heating and cooling of materials, and examine how physical properties at the sub-micron level might differ from those at a far greater scale.

Joerg will lead in-situ TEM efforts to track dynamics of phase transformations and defect evolution on the nanometer length scale (see here).