title: Soluble-insoluble transition in binary heterogeneous nucleation.
abstract: In this Letter, we report the first experimental study of binary heterogeneous gas-liquid nucleation. Onset activities were obtained for nucleation of various n-propanol-water vapor mixtures on 6.9 nm NaCl particles soluble in water and practically insoluble in n-propanol. The Fletcher theory of vapor nucleation on insoluble particles provided a reasonable approximation for n-propanol rich mixtures only, whereas the Köhler theory of activation of soluble particles worked only for water rich mixtures. A new theory was formulated providing a satisfactory description of the transition from activation of soluble particles to vapor nucleation on insoluble particles.
authors.affiliation: Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Austria.
authors.forename: D
authors.initials: D
authors.lastname: Petersen
authors.forename: R
authors.initials: R
authors.lastname: Ortner
authors.forename: A
authors.initials: A
authors.lastname: Vrtala
authors.forename: P E
authors.initials: PE
authors.lastname: Wagner
authors.forename: M
authors.initials: M
authors.lastname: Kulmala
authors.forename: A
authors.initials: A
authors.lastname: Laaksonen