Hostname: page-component-745bb68f8f-s22k5 Total loading time: 0 Render date: 2025-01-29T23:52:43.605Z Has data issue: false hasContentIssue false
  • English
  • Français

Medium-Range Order Structures of Amorphous Diamond-Like Carbon Films

Published online by Cambridge University Press:  21 March 2011

Xidong Chen ,
J. Murray Gibson ,
John Sullivan  and
Tom Friedmann
Xidong Chen
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. Murray Gibson
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
John Sullivan
Affiliation:
Nanostructure and Semiconductor Physics Department, Sandia National Laboratories, Albuquerque, NM 87185–1421
Tom Friedmann
Affiliation:
Nanostructure and Semiconductor Physics Department, Sandia National Laboratories, Albuquerque, NM 87185–1421
Get access

Abstract

In this paper, we have studied medium-range order structures in amorphous diamond-like carbon films with fluctuation microscopy. Medium-range order structures are quantified by a specific form of a general four-body correlation. We name this function as a pair-pair alignment correlation function. By analyzing speckle dark-field images taken over different areas as a function of momentum transfer in reciprocal space, we measured the pair-pair alignment correlation function for both thermally annealed samples and unannealed samples. We have found that thermal annealing introduces medium-range order in amorphous diamond-like carbon films, causing more pairs of atoms to be aligned. These results agree with density-functional simulations. Larger-scale simulations will be needed to fully understand our experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 675: Symposium W – Nanotubes, Fullerenes, Nanostructured and Disordered Carbon , 2001 , W12.1.1
Copyright
Copyright © Materials Research Society 2001

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., “Hard Amorphous (Diamond-like) Carbons”, Progress in Solid State Chemistry, Vol. 21, pp. 199, 1991 Google Scholar
2. Sullivan, J. P., Friedmann, T. A., and Baca, A. G., J. Electron. Mater. 26, 1021 (1997).Google Scholar
3. Elliot, S. R., “Physics of Amorphous Materials”, Longman Scientific & Technical, 1990.Google Scholar
4. Hirsh, P. B, Howie, A., Nicholson, R. B., and Pawshley, D. W., “Electron Microscopy of Thin Crystals”, Butterworths, Washington, 1965.Google Scholar
5. Goodman, J.W. “Statistical Properties of Laser Speckle Patterns”, in “Laser Speckle and Related Phenomena” Editor: Dainty, J.C., Springer-Verlag, 1984.Google Scholar
6. Gibson, J. M. and Treacy, M.M. J., “Diminished Medium-Range Order Observed in Annealed Amorphous Germanium”, Physical Review Letters, Vol. 78, pp. 1074, February 1997.Google Scholar
7. Chen, Xidong and Murray Gibson, J., “A pair-pair alignment correlation function that quantifies medium-range order in amorphous materials”, submitted to Physical Review B, November 2000.Google Scholar
8. Friedmann, T. A., Sullivan, J. P., Knapp, J. A., Tallant, D. R., Follstaedt, D. M., Medlin, D.L., and Mirkarimi, P. B., Appl. Phys. Lett. 71, 3820 (1997).Google Scholar