Using this nonlinear optical technique coupled with a Langmuir trough, concurrent
spectroscopic and thermodynamic data were collected to obtain a molecular picture of the
monolayers. No substantial difference was observed between oxidation of monolayers
spread on water and on 0.6 M sodium chloride solutions. Results indicate that depending
on the size of the aerosol and the extent of oxidation, the subsequent oxidation products
may not remain at the surface of these films, but instead be dissolved in the aqueous
subphase of the aerosol particle. Results also indicate that oxidation of oleic acid could
produce monolayers containing species that have no oxidized acyl chains.