Project C03

Understanding atom probe tomography

  • Project leader(s)
Prof. Dr. Dr. h.c. Guido Schmitz
Prof. Dr. Dr. h.c. Guido Schmitz
University of Stuttgart
Prof. Dr. Johannes Kästner
Prof. Dr. Johannes Kästner
University of Stuttgart
  • Summary
  • Publications

Understanding atom probe tomography of molecular materials

The project extends atom-probe tomography (APT) to analysis of frozen liquids, soft matter, and porous molecular materials and to exploit this analysis method of for the CRC. Our previous results show that the obtained mass spectra are overly complex and field evaporation of hybrid materials is heterogeneous. We will develop innovative pump-probe pulse concepts to control post-desorption fragmentation and homogenize the evaporation rates. Fragmentation patterns, combined with simulations based on density functional theory, help to interpret the mass spectra. Our long-term goal is to extend the range of materials applicable to APT towards further organic solvents and ionic liquids in silica pores as addressed in the CRC.

Research focus in the 1st funding period (2018-2022):
High resolution tomography of mesoscopic pore structures