Investigation on electrical charging/discharging properties of thin ps/pmma polymeric films by dynamic x-ray photoelectron spectroscopy

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buir.advisorSüzer, Şefik
dc.contributor.authorSezen, Hikmet
dc.date.accessioned2016-01-08T18:05:39Z
dc.date.available2016-01-08T18:05:39Z
dc.date.issued2008
dc.departmentDepartment of Chemistryen_US
dc.descriptionAnkara : The Department of Chemistry and the Institute of Engineering and Sciences of Bilkent University, 2008.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2008.en_US
dc.descriptionIncludes bibliographical references leaves 64-72.en_US
dc.description.abstractElectrical charging/discharging properties of thin layers of spin coated pure PS polystyrene (PS), and pure poly(methyl methacrylate), (PMMA) and an immiscible PS/PMMA blend are studied with externally applied DC and dynamic(squarewave stress) X-Ray Photoelectron Spectroscopy (XPS). PS and PMMA exhibit quite different charging properties under DC stress. Due to the different charging properties of PS and PMMA domains within an immiscible PS/PMMA blend film, charge contrast or phase separation is clearly observed between domains. Electrical parameters of PS and PMMA thin films while employing a squarewave pulse stress in a 10-3 - 103 Hz range of frequency are probed by dynamic XPS. A model, which can simulate the dynamical XPS measurements, is shown to lead to obtain effective resistance and capacitance values for each polymer. RC time constants and inflection points(frequency) are also determined. Moreover, thickness also affects the charging/discharging properties and other electrical parameters of polymeric thin films. Furthermore, to mimic certain dielectric properties of thin polymeric films and to validate our model, we have included an externally RC circuit to a conducting graphite sample under both DC and squarewave pulse stresses.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T18:05:39Z (GMT). No. of bitstreams: 1 0003569.pdf: 2110289 bytes, checksum: d086fbf55648981ee27404547e38e153 (MD5)en
dc.description.statementofresponsibilitySezen, Hikmeten_US
dc.format.extentxv, 72 leaves, graphsen_US
dc.identifier.itemidBILKUTUPB108408
dc.identifier.urihttp://hdl.handle.net/11693/14711
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectXPSen_US
dc.subjectDynamic XPSen_US
dc.subjectChargingen_US
dc.subjectDifferential Chargingen_US
dc.subjectTime Constanten_US
dc.subjectCharge Contrasten_US
dc.subjectPhase Seperationen_US
dc.subjectSimulationen_US
dc.subject.lccQD96.P5 S49 2008en_US
dc.subject.lcshPhotoelectron spectroscopy.en_US
dc.subject.lcshX-Ray spectroscopy.en_US
dc.titleInvestigation on electrical charging/discharging properties of thin ps/pmma polymeric films by dynamic x-ray photoelectron spectroscopyen_US
dc.typeThesisen_US

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