1. Institute of Environmental Engineering, ETH Zurich, 8093 Zürich, Switzerland
2. Laboratory for Advanced Analytical Technologies, Empa – Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
3. Electron Microscopy Center, Empa – Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
4. Chemical Engineering Department, Delft University of Technology, 2600 AA Delft, The Netherlands
5. VSPARTICLE B.V, 2629 JD Delft, The Netherlands