Yan Zheng¹, Yaowei Li¹, Qi Zhang², Zhijun Wu¹, Yuechen Liu¹, Song Guo¹, Shiyi Chen¹, Urs Baltensperger³, Claudia Mohr⁴, Wei Huang⁵, Douglas R Worsnop⁶, Penglin Ye⁶ and Qi Chen¹, (1)Peking University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Beijing, China, (2)University of California Davis, Department of Environmental Toxicology, Davis, CA, United States, (3)Paul Scherrer Inst, Villigen, Switzerland, (4)Stockholm University, Department of Environmental Science and Analytical Chemistry, Stockholm, Sweden, (5)Karlsruhe Institute of Technology, Karlsruhe, Germany, (6)Aerodyne Research Inc., Billerica, MA, United States