keywords AEROSOL-PARTICLES ATMOSPHERIC AEROSOL CARBONACEOUS PARTICLES CHEMICAL-COMPOSITION Chemistry Chemistry, Multidisciplinary GLASS WINDOW SURFACES Geochemistry & Geophysics HETEROGENEOUS REACTIONS OH RADICALS PARTICULATE MATTER POLYCYCLIC AROMATIC-HYDROCARBONS Physical Sciences RELATIVE RATE CONSTANTS Science & Technology heterogeneous photochemistry n-alkanes particulate matter (PM10) polycyclic aromatic hydrocarbons (PAH) urban film growth urban grime urban surface chemistry