1. Particle Technology Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zürich, Sonneggstrasse 3, CH-8092 Zürich, Switzerland
2. Institute of Atmospheric and Climate Science, Department of Environmental Systems Science, ETH Zürich, Universitaetstrasse 16, CH-8092 Zürich, Switzerland
3. Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Avenue, Columbus, Ohio 43210, United States