Abstract
Abstract Theoretical developments and experimental work show that: 1. 1.The deposition behavior of metallic vapor beams can be described fairly well when the density fluctuations of the adatoms are assumed to occur in a thermally equilibrated adsorbate-substrate system. 2. 2.The theory of heterogeneous nucleation, where small clusters are described using macroscopic thermodynamic quantities, provides a fair description of many deposition phenomena. However, the prescribed analysis gives equivocal information in the case of very small critical nuclei. 3. 3.Statistical mechanical formulations of nucleation kinetics are incomplete at present, but the approximation that clusters are in their ground state may prove useful in the case of small critical nuclei. 4. 4.Nucleation at very low supersaturations may occur by a mutual impingement mechanism rather than by single-atom addition to a critical nucleus.
Published Version
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