1 Swiss Federal Laboratories for Materials Science and Technology, Empa, Laboratory for Particles-Biology Interactions, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland. Electronic address: peter.wick@empa.ch.
2 ChangChun Institute of Applied Chemistry, Chinese Academy of Science, No 5625 Remin RD, Changchun, Jilin 130022, China.
3 College of Environmental Science and Engineering, Key Laboratory of Yangtze River Water Environment, Tongji University, Shanghai 200092, China.
4 School of Environmental Science and Technology at Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province 116024, China.
5 School of Environment, Beijing Normal University, Beijing 100875, China.
6 Department of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, CA 92697, USA.