Heterogeneous multicomponent nucleation theorems for the analysis of nanoclusters
- 7 May 2007
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 126 (17), 174707
- https://doi.org/10.1063/1.2723073
Abstract
In this paper we present a new form of the nucleation theorems applicable to heterogeneous nucleation. These heterogeneous nucleation theorems allow, for the first time, direct determination of properties of nanoclusters formed on pre-existing particles from measured heterogeneous nucleation probabilities. The theorems can be used to analyze the size (first theorem) and the energetics (second theorem) of heterogeneous clusters independent of any specific nucleation model. We apply the first theorem to the study of small water and n-propanol clusters formed at the surface of 8 nm silver particles. According to the experiments the size of the two-component critical clusters is found to be below 90 molecules, and only less than 20 molecules for pure water, less than 300 molecules for pure n-propanol. These values are drastically smaller than the ones predicted by the classical nucleation theory, which clearly indicates that the nucleating clusters are too small to be quantitatively described using a macroscopic theory.Keywords
This publication has 22 references indexed in Scilit:
- Technical Note: The heterogeneous Zeldovich factorAtmospheric Chemistry and Physics, 2007
- Strange Predictions by Binary Heterogeneous Nucleation Theory Compared with a Quantitative ExperimentThe Journal of Physical Chemistry B, 2001
- Analysis of water–ethanol nucleation rate data with two component nucleation theoremsThe Journal of Chemical Physics, 2000
- Resolution of the Problems of Replacement Free Energy,, and Internal Consistency in Nucleation Theory by Consideration of the Length Scale for Mixing EntropyPhysical Review Letters, 1997
- Performance of Vienna Type Differential Mobility Analyzer at 1.2–20 NanometerAerosol Science and Technology, 1997
- Thermodynamic properties of critical clusters from measurements of vapour–liquid homogeneous nucleation ratesThe Journal of Chemical Physics, 1996
- Measurement of the molecular content of binary nuclei. III. Use of the nucleation rate surfaces for the water-n-alcohol seriesThe Journal of Chemical Physics, 1995
- Measurement of the molecular content of binary nuclei. Use of the nucleation rate surface for ethanol–hexanolThe Journal of Chemical Physics, 1993
- Climate Forcing by Anthropogenic AerosolsScience, 1992
- An analysis of various nucleation mechanisms for sulfate particles in the stratosphereJournal of Aerosol Science, 1982