1. School of Mechanical Engineering, Laboratory of Heterogeneous Mixtures and Combustion Systems, National Technical University of Athens, Athens, Greece
2. Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
3. Centre for Research and Technology Hellas, Aerosol and Particle Technology Laboratory, Chemical Processes and Energy Resources Institute, Thessaloniki, Greece