Prof. Chak K. CHAN

PhD in Chemical Engineering, California Institute of Technology

Dean of School of Energy and Environment

Chair Professor of Atmospheric Environment

Prof. C K CHAN

Contact Information

Office: YEUNG-G5716
Phone: +(852)-3442-5593
Fax: +(852)-3442-0688

Research Interests

  • Aerosol Chemistry
  • Air Pollution

Professor Chan obtained BSc in Chemical Engineering from the University of Texas at Austin in 1986 and PhD in Chemical Engineering from the California Institute of Technology in 1992. He is currently Dean and Chair Professor in School of Energy and Environment at City University of Hong Kong.  He joined the Hong Kong University of Science and Technology (HKUST) as Assistant Professor in 1992 and rose to the rank of Professor in 2006. In 2010, he was appointed Founding Head of Division of Environment. He was Professor of Division of Environment and Professor of Chemical and Biomolecular Engineering at HKUST.

Professor Chan has over 25 years of research experience in air pollution and aerosol science.  He specializes in aerosol water uptake and phase transformation, gas-aerosol interactions and the formation of secondary aerosols in the atmosphere, and laser spectroscopy of aerosols. Professor Chan received Haagen Smit Award of Atmospheric Environment in 2015, Second Prize of the State Natural Science Award in 2010, and First Prize of the Natural Science Award in 2007. He was the first winner of the Asian Young Aerosol Scientists Award.  He was Science Advisor to Secretary of Environment, during his sabbatical at the HKSAR Environment Bureau in 2014.  He has been an Editor-in-Chief of Atmospheric Environment since 2008.

Research interests

Professor Chan's group focuses on aerosol chemistry and air pollution. Current research interests include 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.

Recent Research Projects

  • Air quality in Hong Kong: A supersite program for real-time characterization of particulate matter (PM) in Hong Kong’s air (Sponsor: Environment and Conservation Fund, HKSAR, ECWW09EG04)
  • Effects of particle phase state and relative humidity on the heterogeneous aging of organic aerosols (Sponsor: HK Research Grants Council, General Research Fund, 600208)
  • Effects of acid-catalyzed reactions on the partitioning of oxygenated biogenic volatile organic compounds and their roles in secondary organic aerosol formation (Sponsor: HK Research Grants Council, General Research Fund, 610909)
  • Neutralization of acidic aerosols by gaseous mixtures of ammonia and amines (Sponsor: HK Research Grants Council, General Research Fund, 600112)
  • Real-time measurements of chemical composition and hygroscopic behaviors of ambient aerosols in Hong Kong (Sponsor: HK Research Grants Council, General Research Fund, 600413)


  • Chu Y, Sauerwein M., Chan C.K.* (2015) Hygroscopic and phase transition properties of alkyl aminium sulfates at low relative humidities, Physical Chemistry Chemical Physics, DOI: 10.1039/c5cp02404h.
  • Lee B.P., Li Y.J., Yu J., Louie P., and Chan C.K.* (2015) Characteristics of submicron particulate matter at the urban roadside in downtown Hong Kong – overview of 4 months of continuous high-resolution aerosol mass spectrometer (HR-AMS) measurements, J. Geophysical Research – Atmosphere,
  • Huang D.D., Li Y.J., Lee B.P., and Chan C.K.* (2015) Organic sulfur compounds in atmospheric aerosols at the HKUST Supersite in Hong Kong using HR-ToF-AMS measurements, Environmental Science and Technology, 49, 3672−3679. DOI: 10.1021/es5056269.
  • Cheung H.H.Y, Yeung M.C., Li Y.J., Lee B.P., and Chan C.K.* (2015) Relative Humidity-Dependent HTDMA Measurements of Ambient Aerosols at the HKUST Supersite in Hong Kong, China, Aerosol Science and Technology, 643-654, DOI: 10.1080/02786826.2015.1058482.
  • Sauerwein M., Clegg S.L.* and Chan C.K.* (2015) Water activities and osmotic coefficients of aqueous solutions of five alkyl-aminium sulfates and their mixtures with H2SO4 at 25 °C, Aerosol Science and Technology, 49:566–579. DOI: 10.1080/02786826.2015.10430