1. a Aerosol and Air Quality Research Laboratory, Environmental Engineering and Science Division , University of Cincinnati , Cincinnati , Ohio , USA
2. b Department of Paper Science and Engineering , Miami University , Oxford , Ohio , USA
3. c Department of Chemical Engineering , Yonsei University , Seoul , South Korea
4. d Department of Chemical Engineering , Kanazawa University , Kanazawa , Japan
5. e National Exposure Research Laboratory , U.S. Environmental Protection Agency , Cincinnati , Ohio , USA
6. f Environmental Engineering Science , Washington University , St. Louis , Missouri , USA