Eliska Rezlerova (Laboratory of Chemistry and Physics of Aerosols, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Prague; Department of Physics, Faculty of Science, J. E. Purkinje University, Ústí n. Lab.), Jiří Čejka (Department of Synthesis and Catalysis, J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Prague), Martin Lisal (Laboratory of Chemistry and Physics of Aerosols, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Prague; Department of Physics, Faculty of Science, J. E. Purkinje University, Ústí n. Lab.)