"Analysis of Experimental Nucleation Data for Silver and SiO Using Scal" by Barbara N. Hale, Paul R. Kemper et al.
 

Abstract

The experimental vapor phase nucleation data of Nuth et al., for silver [J. A. Nuth, K. A. Donnelly, B. Donn, and L. U. Lilleleht, J. Chem. Phys. 77, 2639 (1982)] and SiO [J. A. Nuth and B. Donn, J. Chem. Phys. 85, 1116 (1986)] are reanalyzed using a scaled model for homogeneous nucleation [B. N. Hale, Phys. Rev. A 33, 4156 (1986)]. The approximation is made that the vapor pressure at the nucleation site is not diminished significantly from that at the source (crucible). It is found that the data for ln S have a temperature dependence consistent with the scaled theory ln S≈ΓΩ3/2 [Tc /T-1]3/2, and predict critical temperatures 3800 ± 200 K for silver and 3700 ± 200 K for SiO. One can also extract an effective excess surface entropy per atom Ω = 2.1 ± 0.1 and an effective surface tension σ ≈ 1500 - 0.45 T ergs/cm2 for the small silver clusters (assuming a range of nucleation rates from 105 to 1011 cm-3 s-1). The corresponding values for SiO are Ω ≈ 1.7 ± 0.1 and σ ≈ 820 - 0.22 T ergs/cm2 (assuming a range of nucleation rates from 109 to 1012 cm-3 s-1).

Department(s)

Physics

International Standard Serial Number (ISSN)

0021-9606

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1989 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Oct 1989

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