关键词: 带电微粒, 成核机理, 气溶胶

Abstract: The aspects of nucleation and growth mechanisms of charged aerosol particles in the air are dis- cussed. Due to the thinning ozone layer in the atmosphere, the extent of high-energy radiation to the earth surface increases, which causes two reactions when the high-energy radiation exposure to coal combustion and car discharges including SO2 and CO： CO and O2 reaction to generate ozone, and ozone reacts with SO2 and H2O to generate H2SO4 . H2O aerosols; hydrogen bonding with the aqueous aerosol surface condensation of tiny solid particles. In addition, based on the mechanism of polaron in condensed matter theory, the particles of two mutually exclusive with the same charge in the surrounding medium can produce attraction under the action of gathering and cohesion. Shielding potential model is used to derive conclusion that when the induced charge of polar small molecules between two aerosol particles by aerosol charges reaches a quarter of charge of an aerosol charge, two aerosol particles will attractive each other to merge a big one. The increase of charge quantity and density of polar small molecules in the air will lead to enhance attraction between the aerosol particles and degree of haze.

Key words: charged micro-granule, nucleation mechanism, aerosol