Research Area

• Aerosol chemistry
• air pollution
• aerosol spectroscopy

Research Interests

His current research interests focus on gas – particle interactions, in particular, the thermodynamics and hygroscopic properties of atmospheric aerosols, as well as heterogeneous reactions related to the formation of secondary air pollutants. His research involves both field studies (e.g. mechanisms of sampling artifacts of semi-volatile species in aerosols, size distributions of ionic (inorganic and organic) species, aerosol acidity) and laboratory experiments using single particle levitation technique. Most recently, he is a PI of the HKUST Air Quality Research Supersite for real time characterization of ambient aerosols.

Recent Publications

• Lee B.P., Li Y.J., Yu J.Z., Louie P.K.K., and Chan C.K. (2013) “Physical and chemical characterization of ambient aerosol by HR-ToF-AMS at a suburban site in Hong Kong during springtime 2011”, J. Geophysical Research – Atmosphere, 118, 8625–8639, DOI: 10.1002/jgrd.50658.
• Li Y.J., Lee B.Y.L.,Yu J.Z., Ng N.L., and Chan C.K. (2013) “Evaluating the degree of oxygenation of organic aerosol during foggy and hazy days in Hong Kong using high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS)”, Atmospheric Chemistry and Physics, 13, 8739-8753. doi:10.5194/acp-13-8739-2013.
• Cheng W.J., Weng, L.T., Li Y.J., Lau A.P.S., Chan C.K., and Chan C.M. (2013) “Surface Chemical Composition of Size-fractionated Urban Walkway Aerosols Determined by X-ray Photoelectron Spectroscopy”,  Aerosol Science and Technology, 47,  1118-1124. DOI:10.1080/02786826.2013.824066.
• Lee B.P., Li Y.J., Flagan R.C., Lo C. and Chan C.K. (2013) “Sizing characterization of the Fast Mobility Particle Size (FMPS) against SMPS and HR-ToF-AMS”, Aerosol Science and Technology, 47:1030–1037.
• Chan L.P. and Chan C.K. (2013) “The importance of the aerosol phase state in ammonia/amines exchange reactions”, Environmental Science and Technology, http://pubs.acs.org/doi/pdf/10.1021/es4004685.
• Chan K.M., Huang D.D., Li Y.J., Chan M.N., Seinfeld, J.H., and Chan C.K. (2013) “Oligomeric products and formation mechanisms from acid-catalyzed reactions of methyl vinyl ketone on acidic sulfate particles”, J. Atmospheric Chemistry, DOI 10.1007/s10874-013-9248-7.
• Chan L.P. and Chan C.K. (2012) “Roles of the phase state and water content in ozonolysis of internal mixtures of maleic acid and ammonium sulfate particles”, Aerosol Science and Technology, 46, 781-793.
• Li Y. J., Yeung J.W.T., Leung T. P. I., Lau A. P. S., and Chan C. K. (2012) “Characterization of organic particles from incense burning using an Aerodyne high-resolution time-of-flight aerosol mass spectrometer”, Aerosol Science and Technology, 46, 654–665.
• Chan L.P. and Chan C.K. (2012) “Displacement of ammonium from aerosol particles by uptake of triethylamine”, Aerosol Science and Technology , 46, 236–247.
• Guo, H., Wang, D. W., Cheung, K., Ling, Z. H., Chan, C. K., and Yao, X. H. (2012) “Observation of aerosol size distribution and new particle formation at a mountain site in subtropical Hong Kong, Atmos. Chem. Phys., 12, 9923-9939, doi:10.5194/acp-12-9923-2012.  
• Feng J. L. Feng, Guo Z. G. Guo, Zhang T. R., Yao X.H., Chan C.K., Fang M. (2012) “Source and formation of secondary particulate matter in PM2.5 in Asian continental outflow”, J. Geophysical Research -  Atmosphere, VOL. 117, D03302, 11 PP., 2012 doi:10.1029/2011JD016400.
• Wang D.W., Guo H. and Chan C.K. (2012) “Measuring ambient acidic ultrafine particles using iron nanofilm detectors: Method development”, Aerosol Science and Technology, 46, 521–532.