LASER-INDUCED AEROSOL-PARTICLE FORMATION FROM A GASEOUS MIXTURE OF ACROLEIN AND CARBON-DISULFIDE

Upon exposure to N-2 laser light, a gaseous mixture of acrolein and ca rbon disulfide (CS2) produced sedimentary spherical aerosol particles with a mean diameter of approximate to 0.6 mu m. The product yield of the sedimentary aerosol particles deposited on a glass plate at the bo ttom of the cylindrical irradiation cell increased with increasing irr adiation time of N-2 laser light, and with increasing laser intensity up to 3.9 mJ per pulse. The IR and Raman spectra of the sedimentary ae rosol particles showed the bands characteristic of acrolein polymer an d carbon polymer, respectively, indicating that acrolein is polymerize d into the aerosol particles produced from CS2. The nucleation process of the aerosol particles was briefly discussed by measuring He-Ne las er light intensity scattered by the aerosol particles which were forme d under irradiation with N-2 laser light. (C) 1997 Elsevier Science S. A.