Observational analysis shows that secondary organic aerosol formation depends on seed aerosol composition, indicating roles for siloxanol and ammonium sulfate.
Decamethylcyclopentasiloxane is emitted in populated areas and oxidized to form the siloxanol. Small amounts of the siloxanol partition to the particle phase via adsorption onto ammonium sulfate seeds and via absorption into dioctyl sebacate seeds.
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Lewine et al. (2025) studied this question.
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