Affiliation: | aVTT Energy Aerosol Technology Group, P.O. Box 1401, Biologinkuja 7, Espoo, FIN-02044, Finland;bVTT Chemical Technology, Aerosol Technology Group, P.O. Box 1401, FIN-02044 VTT, Finland;cVTT Chemical Technology, P.O.Box 1404, FIN-02044 VTT, Finland |