Postdoc - Development of advanced electron ptychography approaches for materials and life sciences

Jülich Research Centre (FZJ)

Jülich, Germany

Work group:

ER-C-1 – Physik Nanoskaliger Systeme



Area of research:

Scientific / postdoctoral posts



Job description:

The Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons at Forschungszentrum Jülich is a national facility dedicated to research at the frontiers of electron microscopy. It is part of a multilateral interdisciplinary initiative of 7 Helmholtz Centres dedicated to pushing the limits of ptychography, which a computational method to reconstruct microscopic objects. As a member of the moreSTEM research group lead by Prof. Dr. Knut Müller-Caspary, your research contributes state-of-the art electron microscopy experiments and methodology to the consortium of mathematicians, X-ray scientists and IT experts dealing with Big Data challenges.


Your Job:



  • Perform experiments with state-of-the-art aberration-corrected low-voltage STEM machines equipped with ultrafast cameras to record 4D STEM data of 2D materials and biological as well as soft matter specimens

  • Automate multidimensional data acquisition and evaluation to a high level

  • Implement and test novel ptychographic reconstruction schemes in close cooperation with mathematicians, X-ray scientists and IT experts

  • Acompanying simulations to validate results, to optimise acquisition and reconstruction parameters and to frame ranges of validity of ptychographic schemes in electron microscopy

  • Play a key role in the methodological development of momentum-resolved STEM techniques

Your Profile:

  • PhD degree in natural sciences, preferred in in physics
  • Experience in the field of Scanning Transmission Electron Microscopy (STEM)
  • A background and strong interest in scattering theory, solid state physics
  • Programming experience in, e.g., Matlab, Python, C, C++
  • Experience in the field of structural biology/biophysics is beneficial.
  • Fluent command of written and spoken English
  • Most importantly: enthusiam to explore uncharted territory, develop and follow your own ideas
  • Ability to work autonomously in close interaction within a team

Our Offer:

  • Exciting working environment on an attractive research campus with excellent infrastructure, located between the cities of Cologne, Düsseldorf, and Aachen
  • International and interdisciplinary working atmosphere
  • A comprehensive further training programme
  • Flexible working hours and various opportunities to reconcile work and private life
  • Limited for 3 years
  • Full-time position with the option of slightly reduced working hours
  • Salary and social benefits in conformity with the provisions of the Collective Agreement for the Civil Service (TVöD)

Forschungszentrum Jülich promotes equal opportunities and diversity in its employment relations.We also welcome applications from disabled persons.


Please apply via recruiter’s website.

Quote Reference: 2019-455

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