Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

We use 42 different charged nanoparticles generated by electrospray ionization and a differential mobility analyzer of unusual resolving power, as well as a condensation chamber of the turbulent-mixing type to study the dependence between the diameter, charge state, and critical supersaturation of embryos promoting heterogeneous nucleation. The nanoparticles investigated have diameters ranging from 0.43 to 6.51 nm, and positive charge states varying between 1 and 5 elementary units. We find that the critical supersaturation of small singly charged ions (mobility diameters bellow 1.01 nm) is independent of their size and its value coincides with the result anticipated by Thompson in his theory of ion-induced nucleation. On the other hand, the supersaturation required to activate multiply charged embryos is consistently higher than Thomson’s prediction. In fact, the reduction of the critical supersaturation induced by electrification is much smaller than expected for large and multiply charged embryos, and their critical radius is estimated better by Kelvin’s criterion. We speculate that this discrepancy is due to the geometrical differences between the actual nucleation sites and the idealized embryo considered in Thomson’s model.

Bibliography

Gamero-Castaño, M., & de la Mora, J. F. (2002). Ion-induced nucleation: Measurement of the effect of embryo’s size and charge state on the critical supersaturation. The Journal of Chemical Physics, 117(7), 3345–3353.

Authors 2
  1. Manuel Gamero-Castaño (first)
  2. Juan Fernández de la Mora (additional)
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Dates
Type When
Created 22 years, 11 months ago (Sept. 18, 2002, 1:44 p.m.)
Deposited 1 year, 6 months ago (Feb. 10, 2024, 11:07 a.m.)
Indexed 2 weeks, 2 days ago (Aug. 6, 2025, 8:52 a.m.)
Issued 23 years ago (Aug. 15, 2002)
Published 23 years ago (Aug. 15, 2002)
Published Print 23 years ago (Aug. 15, 2002)
Funders 0

None

@article{Gamero_Casta_o_2002, title={Ion-induced nucleation: Measurement of the effect of embryo’s size and charge state on the critical supersaturation}, volume={117}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1492279}, DOI={10.1063/1.1492279}, number={7}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Gamero-Castaño, Manuel and de la Mora, Juan Fernández}, year={2002}, month=aug, pages={3345–3353} }