XPS investigations on conducting polymers

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buir.contributor.authorSüzer, Şefik
buir.contributor.authorBirer, Özgür
dc.citation.epage65en_US
dc.citation.issueNumber1en_US
dc.citation.spage59en_US
dc.citation.volumeNumber22en_US
dc.contributor.authorSüzer, Şefiken_US
dc.contributor.authorBirer, Özgüren_US
dc.contributor.authorSevil, U. A.en_US
dc.contributor.authorGüven, O.en_US
dc.date.accessioned2016-02-08T10:43:45Z
dc.date.available2016-02-08T10:43:45Z
dc.date.issued1998en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractX-ray photoelectron spectroscopy, XPS, was used for the characterization of electrically conducting polymeric materials. In the spectrum of polypyrrole, PPy, the Nls region exhibits two peaks, at 402.0 and 399.8 eV, corresponding to -N+ - and -N-moieties, respectively. The intensity of the N+ peak decreases as the material loses its conductivity, hence the ratio of the experimentally derived N+/C atomic ratio correlates exponentially with the measured conductivity. A similar observation also exists between the F-/C atomic ratio both in polypyrrole and polythiophene. In the XPS spectrum of the composite material prepared using polyaniline, PAN and Polyvinylchloride, PVC, two different kinds of C12p spin-orbit doublets are present after irradiation by 60Co γ-rays. One of the C12p doublets can be assigned to the C-Cl in PVC and the other one is assigned to Cl- ions appearing after radiation. Since no Cl- peak is observed in PVC even after radiation, the presence in the composite must be related to dehydrochlorination of PVC and subsequent capture of the H-Cl by the neighboring PAN moieties. The measured Auger parameter of the Nals level of NaBr deposited on an oxidized form of the conducting polymer is between the values of NaBr deposited on Au (metal) and on Si (semiconductor). However, when NaBr is deposited on a reduced form of conducting polymer, the corresponding value approaches to that deposited on quartz (insulator).en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:43:45Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 1998en
dc.identifier.issn1300-0527
dc.identifier.urihttp://hdl.handle.net/11693/25377
dc.language.isoEnglishen_US
dc.publisherTÜBİTAKen_US
dc.source.titleTurkish Journal of Chemistryen_US
dc.titleXPS investigations on conducting polymersen_US
dc.typeArticleen_US

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