Dipole Moment of Condensing Monomers: A New Parameter Controlling the Ion-Induced Nucleation

Many chemically active, hazardous, and toxic substances have a high dipole moment, and they interact strongly with the charged particles and molecular ion clusters. A new nucleation model considering the contribution of the dipole-charge interaction to the ion-induced nucleation rates is developed, with the dipole moment of the condensing monomers as a new parameter. It is shown that in the polar vapors the influence of the dipole-charge interaction on the nucleation rates may be much stronger than the Thomson effect. The new model is an extension of the classical ion-induced nucleation theory, and can explain the deviation between the experimental data and the predictions of the classical ion-induced nucleation theory.