ENVR 4 |
| Atmospheric aerosol particles typically contain many different components and multiple distinct phases may occur within a single particle. We have used single particle aerosol mass spectrometry to study how particle morphology affects the kinetics of the uptake of ozone by oleic acid particles. In particular, we have probed the kinetics of mixed oleic acid/myristic acid particles at tropospherically relevant temperatures in order to investigate the correlations between bulk phase behavior, particle morphology and reactivity. We have also investigated porous and nonporous particles coated with oleic acid. For both porous and nonporous particles, the rate of uptake of ozone by oleic acid is directly related to the amount of oleic acid coating. Current experiments are underway to assess whether oleic acid may be trapped in the pores of the porous particles, which would make the oleic acid less accessible for reaction with ozone. |
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Atmospheric Aerosol Processes
8:30 AM-11:45 AM, Sunday, August 19, 2007 Boston Park Plaza -- Stanbro Rm, Oral
Division of Environmental Chemistry |