A method of particle sizing of irregularly shaped aerosols by dynamic light scattering was established. The feasibility of the method was tested with irregularly shaped aerosol particles modeled by diesel soot and mass-equivalent spherical particles. From the analysis on the effects of the scattering angle and the variation of particle shape factors, we proved the effectiveness of backward dynamic light scattering for the in situ measurement of diameter and mass concentration of irregular aerosol particles.
