The origin of preferred orientation during carbon film growth

Taylor, M, Lau, D, Partridge, J, McCulloch, D, Marks, N, Teo, E and Mckenzie, D 2009, 'The origin of preferred orientation during carbon film growth', Journal of Physics Condensed Matter, vol. 21, no. 22, pp. 225003-225011.


Document type: Journal Article
Collection: Journal Articles

Title The origin of preferred orientation during carbon film growth
Author(s) Taylor, M
Lau, D
Partridge, J
McCulloch, D
Marks, N
Teo, E
Mckenzie, D
Year 2009
Journal name Journal of Physics Condensed Matter
Volume number 21
Issue number 22
Start page 225003
End page 225011
Total pages 9
Publisher Iop Publishing Ltd
Abstract Carbon films were prepared using a filtered cathodic vacuum arc deposition system operated with a substrate bias varying linearly with time during growth. Ion energies were in the range between 95 and 620eV. Alternating dark, high density (sp3 rich) bands and light, low density (sp2 rich) bands were observed using cross-sectional transmission electron microscopy, corresponding to abrupt transitions between materials with densities of approximately 3.1 and 2.6gcm-3. No intermediate densities were observed in the samples. The low density bands show strong preferred orientation with graphitic sheets aligned normal to the film. After annealing, the low density bands became more oriented and the thinner high density layers were converted to low density material. In molecular dynamics modelling of film growth, temperature activated structural rearrangements occurring over long timescales (ps) caused the transition from sp3 rich to oriented sp2 rich structure. Once this oriented growth was initiated, the sputtering yield decreased and channelling was observed. However, we conclude that sputtering and channelling events, while they occur, are not the cause of the transition to the oriented structure.
Subject Surfaces and Structural Properties of Condensed Matter
Materials Engineering not elsewhere classified
DOI - identifier 10.1088/0953-8984/21/22/225003
Copyright notice © 2009 IOP Publishing Ltd.
ISSN 0953-8984
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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