Deposition of aerosol particles below 10 nm on a mixed screen-type diffusion battery

Abstract

Experimental characterization of a mixed screen-type diffusion battery has been made by using monodisperse neutral particles with diameter below 10 nm. The diffusion battery contained two >composite> grids, each of them consisting of a gold screen sandwiched between two aluminum screens. The equivalent fiber diameter of the composite grid was obtained by fitting the experimental penetration data for uncharged particles to the Cheng-Yeh model. Once the equivalent or effective fiber diameter is known, the fan filter model of Cheng and Yeh allows accurate prediction of particle penetration through the mixed-screen type diffusion battery. © Taiwan Association for Aerosol Research.