1. Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Colorado 80309, United States
2. Center for Aerosol and Cloud Chemistry, Aerodyne Research Inc., Billerica, Massachusetts 01821, United States
3. Department of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
4. Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, United States