Quantitative Characterization of Critical Nanoclusters Nucleated on Large Single Molecules

Paul Winkler (Korresp. Autor*in), Aron Vrtala, Gerhard Steiner, Daniela Wimmer, H Vehkamaki, Kari E. J. Lehtinen, Georg Reischl, Markku Kulmala, Paul Wagner

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

First order phase transitions involve nucleation, formation of nanoscale regions of a new phase within a metastable parent phase. Using the heterogeneous nucleation theorem we show how clusters formed by nucleation on single molecules evolve from the gas phase and determine the critical size beyond which condensation starts to form aerosol particles. Our experiments reveal the activation of molecules into droplets to happen via formation of critical clusters substantially larger than the seed molecule. The nanosized critical clusters were found to be well predicted by the Kelvin-Thomson relation pointing directly to the key step in the phase transition.
OriginalspracheEnglisch
Aufsatznummer085701
Seitenumfang5
FachzeitschriftPhysical Review Letters
Jahrgang108
Ausgabenummer8
DOIs
PublikationsstatusVeröffentlicht - 2012

ÖFOS 2012

  • 1030 Physik, Astronomie
  • 103008 Experimentalphysik
  • 105904 Umweltforschung

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