Vapor phase nucleation on neutral and charged nanoparticles: Condensation of supersaturated trifluoroethanol on Mg nanoparticles

Authors

Victor Abdelsayed, Virginia Commonwealth University
M. Samy El-Shall, Virginia Commonwealth UniversityFollow

Document Type

Article

Original Publication Date

2007

Journal/Book/Conference Title

The Journal of Chemical Physics

Volume

126

Issue

2

DOI of Original Publication

10.1063/1.2404679

Comments

Originally published at http://dx.doi.org/10.1063/1.2404679

Date of Submission

October 2015

Abstract

A new technique is described to study the condensation of supersaturated vapors on nanoparticles under well-defined conditions of vapor supersaturation, temperature, and carrier gas pressure. The method is applied to the condensation of supersaturated trifluoroethanol (TFE) vapor on Mg nanoparticles. The nanoparticles can be activated to act as condensation nuclei at supersaturations significantly lower than those required for homogeneous nucleation. The number of activated nanoparticles increases with increasing the vapor supersaturation. The small difference observed in the number of droplets formed on positively and negatively charged nanoparticles is attributed to the difference in the mobilities of these nanoparticles. Therefore, no significant charge preference is observed for the condensation of TFE vapor on the Mg nanoparticles.

Rights

Abdelsayed, V., El-Shall, M. S. Vapor phase nucleation on neutral and charged nanoparticles: Condensation of supersaturated trifluoroethanol on Mg nanoparticles. The Journal of Chemical Physics 126, 024706 (2007). Copyright © 2007 AIP Publishing LLC.

Is Part Of

VCU Chemistry Publications