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An investigation of photoassisted diffusion of oxygen in solid C60 films using resonant alpha-scattering

Published online by Cambridge University Press:  03 March 2011

Corinne C. Eloi ,
David J. Robertson ,
A.M. Rao ,
Ping Zhou ,
K-A. Wang  and
Peter C. Eklund
Corinne C. Eloi
Affiliation:
Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, and Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511
David J. Robertson*
Affiliation:
Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, and Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511
A.M. Rao
Affiliation:
Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, and Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
Ping Zhou
Affiliation:
Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, and Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
K-A. Wang
Affiliation:
Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, and Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
Peter C. Eklund
Affiliation:
Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, and Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
*
a)Author to whom correspondence should be addressed.
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Abstract

The interaction of molecular oxygen with thin C60 films was investigated using the 3.04 MeV resonance in the 16O(α, α)16O elastic scattering reaction to measure the concentration profile of oxygen in the fullerene films. A thin (d ≍ 20 nm) layer containing oxygen was observed on the surface of C60 films (d ≍ 200 nm) exposed to ∼1 atm of O2 for 1 h in the absence of light. In contrast, oxygen was uniformly distributed throughout the entire film when samples were irradiated for 1 h with either a 488 nm Ar ion laser or Xe lamp in the presence of ∼1 atm of O2. This O2 uptake was found to be both power dependent and reversible.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 12 , December 1993 , pp. 3085 - 3089
Copyright
Copyright © Materials Research Society 1993

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References

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