Aerosol nanoparticle formation has been identified as a significant source of ambient aerosol that may impact cloud properties
and is considered a health threat. Our research aims at resolving the initial steps in the transition of (trace) vapors to the
condensed phase in nanoparticles. Such phase transition processes constitute a vital link between molecular scale interactions
and macroscopically relevant outcome.
Specifically we study:
Biogenic aerosol formation using small angle x-ray scattering (SAXS)
Nanoparticle growth mechanisms using a differential mobility analyzer (DMA) train
Heterogeneous nucleation using the versatile size analyzing nuclei counter (vSANC)
To a large extent the experiments are conducted in our laboratory at the Faculty of Physics, but we also participate frequently
in international measurement campaigns.
Besides field measurements at the SMEAR II station in Hyytiälä, Finland, we have lately been at the synchrotrons Elettra in Triest, Italy, and at CERN, Geneva, Switzerland. We are actively participating in the CLOUD project which is dedicated to the study of ambient nanoparticle formation under precisely controlled chamber conditions.
The CLOUD chamber at CERN allows us to investigate specifically the influence of cosmic rays and trace amounts of vapors on nanoparticle formation.
1090 Vienna, Austria