Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-02T23:53:21.754Z Has data issue: false hasContentIssue false
  • English
  • Français

A Surface Raman and Scanning Tunneling Microscopy Study of The Spatial Distribution of Corner-Sharing and Edge-Sharing Octahedra on thermally Oxidized Tungsten

Published online by Cambridge University Press:  10 February 2011

Matthew J. Côté ,
Corey Radloff ,
Joseph M. Osman ,
Rebecca Bussjager ,
R. Martin Villarica ,
Fazio Nash  and
J. Chaiken
Matthew J. Côté
Affiliation:
Department of Chemistry, Bates College, Lewiston, Maine 04240
Corey Radloff
Affiliation:
Department of Chemistry, Bates College, Lewiston, Maine 04240
Joseph M. Osman
Affiliation:
Rome Laboratory, Rome, New York 13441–4515
Rebecca Bussjager
Affiliation:
Rome Laboratory, Rome, New York 13441–4515
R. Martin Villarica
Affiliation:
Laser Chemical Corporation, 302 Edwards Dr., Fayetteville, New York 13066, [email protected]
Fazio Nash
Affiliation:
Department of Chemistry, Syracuse University, Syracuse, New York 13244–4100
J. Chaiken
Affiliation:
Department of Chemistry, Syracuse University, Syracuse, New York 13244–4100
Get access

Abstract

We have measured the dependence of the strength of Raman activity of polycrystalline m-WO3 on spot size at constant laser power density. These data are compared to surface area scaling measurements obtained using scanning tunneling microscopy. We argue that the spatial distribution of scattering centers is the complement of the spatial distribution of crystallographic shear (CS) structures on or near the oxide surface. Our results are consistent with there being an essentially uniform spatial distribution of scattering sites which implies the spatial distribution of defect sites is also uniform. At the laser power density involved and at the defect densities studied, we found no evidence suggesting a large amount of cooperativity in the formation of CS structures. These results suggest a qualitative description of the structure of common oxide surfaces in agreement with a basic assumption of the JMAK theory of first order phase transformations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 495: Symposium W – Chemical Aspects of Electronic Ceramics Processing , 1997 , 413
Copyright
Copyright © Materials Research Society 1998

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. Deb, S. K., Appl. Opt. 801(1972), Philos. Mag. 27, 801(1973)Google Scholar
2. Osman, Joseph M., Bussjager, Rebecca J., Nash, Fazio, Villarica, R. M., Chaiken, J., Appl. Phys. A. in pressGoogle Scholar
3. Villarica, R. M., Nash, Fazio, Osman, Joseph M., Bussjager, Rebecca J., Chaiken, J., Proc. Mat. Res. Soc. 397, 347(1996)Google Scholar
4. Sundberg, M., Tilley, R. J. D., J. Solid State Chem. 11, 150–160(1974)Google Scholar
5. Granquist, C. G., “Handbook of Inorganic Electrochromic Materials” (Elsevier, Amsterdam, 1995)Google Scholar
6. Daniel, M. F., Desbat, B. and Lassegues, J. C., J. Solid State Chem. 73, 127–139(1988), J. Solid State Chem. 67, 235–247 (1987)Google Scholar
7. Kolmogorov, A. N., Izv. Akad. Nauk SSSR, Ser. Matem No. 3, 355–359(1937)Google Scholar
8. Johnson, W. and Mehl, R. F., TAIME 135, 416–442, Discussion 442–458(1939); unpublished details of the derivations in Appendices A-E deposited as ADI number 1182 with the American Society for Information Science (ISIS), 8720 Georgia Avenue, Silver Spring, MD 20910–3603.Google Scholar
9. Avrami, Melvin, J. Chem. Phys. 7, 1103–1112(1939), J. Chem. Phys. 8, 212–224(1940), J. Chem. Phys. 9, 177–184(1941)Google Scholar
10. Jones, F. H., Rawlings, K., Foord, J. S., Egdell, R. G., Pethica, J. B., Wanklyn, B. M. R., Parker, S. C., Oliver, P. M., Surf. Sci. 359, 107–121(1996)Google Scholar
11. Jones, F. H., Rawlings, K., Foord, J. S., Cox, P. A., Egdell, R. G., Pethica, J. B., Wanklyn, B. M. R., Phys. Rev. B. 52, R14 392–R14 395(1995-II)Google Scholar
12. Jones, F. H., Dixon, R. A., Brown, A., Surf. Sci. 369, 343–350(1996)Google Scholar
13. Binnig, G. and Smith, D. P. E., Rev. Sci. Instrum. 57, 1688(1986).Google Scholar
14.”stick-slip”, or “inertial drive”, translator first described by Pohl, D. W., Rev. Sci. Instrum. 58, 54(1987).Google Scholar