Abstract
Upon exposure to N 2 laser light, a gaseous mixture of trimethyl(2-propynyloxy)silane (TMPSi) and acrolein (AC) produced sedimentary spherical aerosol particles with a mean diameter of ≈ 0.5 μm. The IR spectrum of the sedimentary aerosol particles showed bands characteristic of polyacrolein, and XPS showed two Si 2p bands assignable to elemental silicon and silicon bonded in an organosilicon polymer, indicating that TMPSi was incorporated into the parent aerosol particles of polyacrolein, and cleavage of Si-C and Si-O bonds took place in the aerosol particles. The nucleation process of the aerosol particles was investigated by measuring He-Ne laser light intensity scattered by the aerosol particles as formed under irradiation with N 2 laser light.
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