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Barriers to the Nucleation of Methyl Groups on the Diamond (111) Surface

Published online by Cambridge University Press:  21 February 2011

Steven M. Valone
Steven M. Valone*
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

Questions about the mechanism of diamond film growth by low-pressure, plasma-assisted chemical vapor deposition methods have persisted for some time now. As an attempt to explore one aspect of the problem, we examine the energetics of several adsorbed diamond (111) surfaces. The adsorbates are mixtures of methyl groups and hydrogen atoms. The model for these systems is the molecular orbital hamiltonian of Dewar and coworkers.

From these calculations we find that H adsorbtion is preferred due both to bond energy and steric effects. Thus, nucleation of a cluster of three or more methyl groups, as assumed in earlier work, is energetically very demanding.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989 , 227
Copyright
Copyright © Materials Research Society 1989

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References

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