1. KU Leuven, Department of Mechanical Engineering, Division of Applied Mechanics and Energy Conversion (TME), B-3001 Leuven, Belgium
2. University of Mons, Plasma-Surface Interaction Chemistry (ChIPS), CIRMAP, Research Institute for Materials Science and Engineering, B-7000 Mons, Belgium
3. Jožef Stefan Institute, Department of Condensed Matter Physics, Ljubljana, Slovenia