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Formation of a Ni3O4 Spinel Phase on the Surface of NiO During Electron Irradiation

Published online by Cambridge University Press:  25 February 2011

Mary I. Buckett  and
L. D. Marks
Mary I. Buckett
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
L. D. Marks
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
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Abstract

Structural changes occurring at the surface of NiO during electron irradiation were examined in-situ with a variable voltage high resolution electron microscope. The interaction of the specimen with the electron beam was found to be highly dependent on the state of the surface prior to irradiation. It was observed that by varying the sample preparation conditions, the Ni on the surface of NiO could either be oxidized to Ni304 spinel phase or reduced to islands of metallic Ni. The formation of the Ni3O4 spinel phase is in agreement with previous surface science studies, where chemical shift information identified the presence of Ni3+ species at the surface. This has previously been interpreted as the formation of Ni203

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 129: Symposium B – Laser and Particle-Beam Modification of Chemical Processes on Surfaces , 1988 , 521
Copyright
Copyright © Materials Research Society 1989

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References

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