Johannes Berndt

Axe PEVS
Axe MFPL

Centres d'intérêt / Activité scientifique

• Investigation and application of microwave  plasmas +rf-plasmas
  • Set up and investigation of radical sources (N,H-atom sources)
     
• Plasma surface interactions and thin film deposition
  • study of synergistic effects during  the growth and etching of carbonaceous thin films
  • functionalization of surfaces
  • superhydrophilic and superhydrophobic surfaces
     
• Reactive plasmas and plasma chemistry
  • formation of nanoparticles in low temperature plasmas
  • formation of negative ions in pulsed discharges
  • in-situ diagnostic of nano-submicron particles by means of laser light scattering and FTIR-spectroscopy
  • plasma based synthesis of nanocomposite materials
     
• Magnetron sputtering and fuel cells
  • production of bi- and trimetallic electrodes for fuel cell applications

Compétences

• Plasma diagnostics
  • emission and absorption spectroscopy (incl. UV – and FTIR- spectroscopy), LIF
  • microwave interferometry
  • Langmuir probe measurements
  • mass spectroscopy (Plasma-Ion-Mass-Spectroscopy, Threshold-Ionisation-Mass Spectroscopy, Modulated Beam Mass-Spectroscopy)
     
• Particle and thin film diagnostics
  • Near Edge X-ray Absorption Fine Structure Spectroscopy (NEXAFS)
  • Nuclear Reaction Analysis, Rutherford Backscattering
  • RAMAN- Spectroscopy
  • Ellipsometry
  • IR- und UV- Absorption spectroscopy
  • Electron microscopy (SEM,TEM)
     
• Discharge types
  • Inductively coupled discharges, Capacitively coupled discharges,  Surface wave produced discharges (Microwave and HF-plasmas), Magnetron discharges

• Modelling
  • Modelling of microwave discharges: collisional radiative models  coupled with self consistent solutions of the Boltzmann equation, numerical solution of Maxwell equations, plasmachemical simulations

Responsabilités

• Project manager of the European SmartCat project
• FP7 Fuel Cells and Hydrogen Joint Technology Initiative grant agreement FP7-2012-JTI-FCH-325327
• Member of the Editorial Board of Scientific reports (Nature publishing group)

Divers

Member of EDFS, EPS, Plasma Germany

Diplômes

• 1992:   Diploma in Physics at the Ruhr-University in Bochum. Thesis title: “On the influence of metastable atoms on a surface wave produced plasma”
• 1996:   PhD in Physics obtained at the Ruhr-University Bochum. Thesis title: “Surface wave propagation in inhomogeneuos plasmas”
• 2008:   Habilitation (according to German research system), Faculty for Physics and Astronomy, Ruhr University Bochum, Germany. Title: “Reactive complex plasmas”.

Expériences professionnelles

• April 92 – February 96       Research associate, Experimental Physics II, Ruhr University Bochum, Germany
• February/96 – April/98       Employee of Linde AG Munich (Werksgruppe Technische Gase)
• May/98 – February 2008    Group-leader (senior scientist) at the Institute of experimental physics II, Ruhr-University Bochum
• Since March 2008             Researcher at GREMI, Orleans, France
• 1992- 96 and 1998- today   teaching (courses, exercises, etc; for undergraduate and graduate students)
• 2001-2003 and 2005-2008: Lecturer at the Summer School "Low Temperature Plasma Physics" at Bad Honnef:  “Microwave discharges, Surface wave discharges”
• 2004: Lecturer at the European Marie Curie Training Course "Low Temperature Plasma Physics: Basics and Applications“
• Supervisor of undergraduate and graduate students, and PhD candidates
• Principal investigator of several 3rd party funded projects 

Mes 5 publications principales

1. Numerical calculations on surface wave propagation in longitudinally non-uniform plasmas
   Yu M Aliev, J. Berndt, H. Schluter and A. Shivarova
   Plasma Phys. Control. Fusion 36 937-944 (1994)
    
2. Quantitative analysis of the atomic nitrogen concentration in a remote plasma by means of mass spectrometry
   D Douai, J Berndt and J Winter
   Plasma Sources Sci Tech. 11, 60-68, (2002)
    
3. The controlled formation of dust particles in pulsed plasmas
   J. Berndt, E. Kovacevic, and L. Boufendi
   Journal of Applied Physics, 106, 063309 (2009)
    
4. Some aspects of reactive complex plasmas  (invited review paper)
   J. Berndt, E. Kovacevic, I. Stefanovic, J. Winter and L. Boufendi
   Contributions in Plasma Physics 49, 107-133 (2009)
    
5. Deposition and tuning of nanostructured hydrocarbon deposits: from superhydrophobic to superhydrophilic and back
   Berndt, J., Acid, H., Kovacevic, E., Boufendi, L.
   J. Appl. Phys. 113, 063302 (2013)

Publications au GREMI (depuis 2008)

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