COMBINED HERM AND EELS STUDIES OF THE ELECTRON BEAM INDUCED REDUCTION OF MAXIMAL-VALENCE TRANSITION-METAL OXIDES.

Niel J. Long*, Amanda K. Petford-Long

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

High resolution electron microscopy has been used in conjunction with electron energy loss spectroscopy to follow the beam-induced reduction of WO//3, V//2O//5 and CuO, all of which are maximal valence oxides. All three oxides underwent reduction, although there are differences in the reduction pathway: WO//3 is reduced directly to the metal by loss of oxygen from the surface layers; CuO is reduced to the metal via at least two intermdiate oxides (Cu//4O//3 and Cu//2O); and V//2O//5 forms a reduced oxide (possibly V//6O//1//3) and then remains stable. It was possible to drill holes in V//2O//5 with an intense, small electron probe (using a field-emission electron gun) provided the sample had previously only been exposed to an electron dose below a critical value ( less than 10**8 e/nm**2). Preliminary doses higher than this critical value rendered the oxide immune to hole drilling (but not to a subsequent reduction to the stable oxide mentioned above), suggesting that holes can only be drilled while the material retains the original V//2O//5 structure.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposia Proceedings
EditorsMichael O. Thompson, S.Thomas Picraux, James S. Williams
PublisherMaterials Research Soc
Pages299-304
Number of pages6
Volume74
ISBN (Print)0931837405
StatePublished - Dec 1 1987
EventBeam-Solid Interact and Transient Processes - Boston, MA, USA
Duration: Dec 1 1986Dec 4 1986

Other

OtherBeam-Solid Interact and Transient Processes
CityBoston, MA, USA
Period12/1/8612/4/86

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Long, N. J., & Petford-Long, A. K. (1987). COMBINED HERM AND EELS STUDIES OF THE ELECTRON BEAM INDUCED REDUCTION OF MAXIMAL-VALENCE TRANSITION-METAL OXIDES. In M. O. Thompson, S. T. Picraux, & J. S. Williams (Eds.), Materials Research Society Symposia Proceedings (Vol. 74, pp. 299-304). Materials Research Soc.