1. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, United States
2. Department of Chemistry and Biochemistry, Mount Allison University, Sackville E4L 1G8, Canada
3. Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
4. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30331, United States
5. Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia 30322, United States
6. Institute of Chemical Engineering Science, Foundation for Research and Technology, Patras GR-26504, Greece
7. Laboratory of Atmospheric Processes and their Impacts, School of Architecture, Civil & Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland