The phase behavior and synthesis of mesostructured coupled semiconductor thin films : MESO-CdS-TiO2

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buir.advisorDağ, Ömer
dc.contributor.authorOkur, Halil İbrahim
dc.date.accessioned2016-01-08T18:09:52Z
dc.date.available2016-01-08T18:09:52Z
dc.date.issued2009
dc.descriptionAnkara : The Department of Chemistry and the Institute of Engineering and Sciences of Bilkent University, 2009.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2009.en_US
dc.descriptionIncludes bibliographical references leaves 86-100.en_US
dc.description.abstractMesostructured [Cd(H2O)4](NO3)2 - titania - P123 ((PEO)20(PPO)70(PEO)20, PEO = -OCH2CH2-, PPO = -OCH(CH3)CH2-) materials have been investigated by changing the [Cd(H2O)4](NO3)2 and titania content of the structures. This has been achieved by making thick samples by casting and thin film samples by spin coating of a butanol solution of [Cd(H2O)4](NO3)2, P123, nitric acid and Ti(OC4H9)4. The film samples are named as meso-xCd(II)-yTiO2, where x is the Cd(II)/P123 and y is TiO2/P123 mole ratios. Increasing the titania amount in the media has transformed the samples from LC-like to soft and then to rigid mesostructured materials. Changing the amount of [Cd(H2O)4](NO3)2 salt in the media only influenced the mesostructure, such that no change on the mechanical properties is observed. However, the synthesis of rigid mesostructured titania materials required controlled humidity. The rigid film samples were prepared first by spin coating and then by aging under a 50% humidity oven. The mesostructure remains stable upon H2S reaction, in the soft and rigid materials region. However, only rigid samples stand to removal of nitrates from the media that is important to keep the CdS nanoparticles stable in or on the pore walls of mesostructured film samples. The phase behavior of the meso-Cd(II)-TiO2, the structural properties of the meso-xCdS-yTiO2 samples, coordination and elimination of the NO3 - ions and the particle size of the CdS nanocrystallites were investigated using diffraction (XRD), spectroscopy (FT-IR, Raman and UV-Vis absorption, EDS) and microscopy (POM, SEM, and TEM) techniques.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T18:09:52Z (GMT). No. of bitstreams: 1 0003808.pdf: 2235331 bytes, checksum: d46358013584a77ab0c7a69fb0cf7c76 (MD5)en
dc.description.statementofresponsibilityOkur, Halil İbrahimen_US
dc.format.extentxvi, 100 leaves, illustrations, graphsen_US
dc.identifier.itemidBILKUTUPB117418
dc.identifier.urihttp://hdl.handle.net/11693/14866
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPhase diagramen_US
dc.subjectPluronicsen_US
dc.subjectTransition Metal Complexesen_US
dc.subjectTitaniaen_US
dc.subjectMesostructured and Mesoporous Titaniaen_US
dc.subjectCdS Nanoparticlesen_US
dc.subjectThin Filmsen_US
dc.subject.lccTK7871.15.F5 O58 2009en_US
dc.subject.lcshSemiconductor films.en_US
dc.subject.lcshThin films.en_US
dc.subject.lcshSemiconductors.en_US
dc.subject.lcshNanoparticles.en_US
dc.titleThe phase behavior and synthesis of mesostructured coupled semiconductor thin films : MESO-CdS-TiO2en_US
dc.typeThesisen_US
thesis.degree.disciplineChemistry
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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