COLL 13 |
| Field studies of marine and continental aerosols find that fatty acid films form on aqueous tropospheric aerosols. Oxidation of the acyl chains is thought to be key to aerosol growth. Using vibrational sum frequency generation spectroscopy and reflection absorption infrared spectroscopy, we present a molecular-level investigation of the interfacial structure of fatty acid monolayers at the air-water interface and explore reactions with atmospheric oxidants by these model systems. Results include reaction of oleic acid with atmospheric oxidants and subsequent replacement of the products at the interface by less soluble species from the aqueous subphase. |
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Environmental Interfaces
8:30 AM-12:00 PM, Sunday, 10 September 2006 Sir Francis Drake -- Empire Room, Oral
Division of Colloid & Surface Chemistry |