Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-25T17:42:22.831Z Has data issue: false hasContentIssue false
  • English
  • Français

Simple Graphitic Network Models of “Diamondlike” Carbon

Published online by Cambridge University Press:  26 February 2011

Michael A. Tamor  and
Ching-Hsong Wu
Michael A. Tamor
Affiliation:
Research Staff, Ford Motor Company, Dearborn MI 48121-2053
Ching-Hsong Wu
Affiliation:
Research Staff, Ford Motor Company, Dearborn MI 48121-2053
Get access

Abstract

Several highly disordered forms of carbon are termed “diamondlike” by virtue of their extreme hardness and significant optical gap. However, it is quite tempting to extend the analogy further and attribute these “diamondlike” properties to a high degree of local diamond order. Although an “amorphous diamond” character has been inferred from the optical properties in the 0-10 eV range, and the position of the π + σ plasmon peak in the electron energy loss spectrum, there is no direct evidence for such diamond order. However, there is a considerable body of work showing that DLC embodies a considerable degree of graphitic order which determines the optical gap and Raman spectrum. In order to determine to what extent a clearly non-diamond structure can exhibit specific “diamondlike” properties, we examine a simple structure derived from graphite. This “defected graphite” (DG) construct presumes an underlying graphitic structure which is insulating due to the strong localization of π -electrons by randomly distributed non-aromatic defects. Using specific defects suggested by experiment, the DG model reproduces a quite surprising array of observed properties of both hydrogenated and hydrogen-free “diamondlike” carbon.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 162: Symposium F – Diamond, Silicon Carbide and Related Wide Bandgap Semiconductors , 1989 , 49
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1) Robertson, J., Adv. in Phys. 35, 317 (1986). This is an excellent, though slightly dated review of DLC.Google Scholar
2) Berger, S. D., McKenzie, D. R. and Martin, P. J., Philos. Lett. 57, 285 (1988)Google Scholar
3) Savvides, N., J. Appl. Phys. 59, 4133 (1986).Google Scholar
4) Tamor, M. A., Haire, J. A., Wu, C. H. and Hass, K. C., Appl. Phys. Lett. 54, 123 (1989).Google Scholar
5) Gao, C., Wang, Y. Y., Ritter, A. L. and Dennison, J. R., Phys. Rev. Lett. 62, 945 (1989).Google Scholar
6) Miyazawa, T., Misawa, S., Yoghida, S. and Gonda, S., J. Appl. Phys. 55, 188 (1984).Google Scholar
7) Tamor, M. A., Wu, C. H., Carter, R. O. III and Lindsay, N. E., Appl. Phys. Lett. 55, 1388 (1989).Google Scholar
8) Tamor, M. A. and Wu, C. H., J. Appl. Phys. (in press, to appear January 1990).Google Scholar
9) Angus, J. C. and Jansen, F., J. Vac. Sci. Tech. A6, 1778 (1988).Google Scholar
10) Mildner, D. F. R. and Carpenter, J. M., J. Non. Cryst. Sol. 47, 391 (1982).Google Scholar
11) Drickamer, H. in “Solid State Physics,” vol.17, p. 1 (Academic, NY, 1965, Seitz, F. and Turnbull, D., eds.).Google Scholar
12) Rossnagel, S. M., Russack, M. A. and Cuomo, J. J., J. Vac. Sci. Tech. A2, 2150 (1987) and J. J. Cuomo, private communication.Google Scholar