Oxygen-induced ESR line broadening in conducting polymers

The oxygen-induced ESR line broadening has been investigated in the case of the conducting polymer polyaniline in powder and film form. Pumping under vacuum results in a narrowing of the ESR linewith. After initial pumping various oxygen containing gas has been applied to the sample (pure O 2, O 2 +...

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Bibliographic Details
Published in:Synthetic metals 1995-03, Vol.69 (1), p.193-196
Main Authors: Aasmundtveit, K., Genoud, F., Houzé, E., Nechtschein, M.
Format: Article
Language:English
Subjects:
Composition
Conductive films
Diffusion
Electric conductivity
Oxygen
Paramagnetic resonance
Powders
Sorption
Velocity
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Summary:The oxygen-induced ESR line broadening has been investigated in the case of the conducting polymer polyaniline in powder and film form. Pumping under vacuum results in a narrowing of the ESR linewith. After initial pumping various oxygen containing gas has been applied to the sample (pure O 2, O 2 + N 2, O 2 + He), and the linewidth has been measured as a function of time. At first, the linewidth increases similarly in the various cases. Then, different behaviors are observed, which are discussed according to the relative velocity of the sorption / diffusion process of oxygen and its partner. The connection of the line broadening with the samlpe conductivity is also discussed.
ISSN:0379-6779
1879-3290
DOI:10.1016/0379-6779(94)02414-T