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dc.contributor.advisorGarmestani, Hamid
dc.contributor.authorAmani Hamedani, Hoda
dc.date.accessioned2014-08-27T13:31:38Z
dc.date.available2014-08-28T05:30:05Z
dc.date.created2013-08
dc.date.issued2013-05-15
dc.date.submittedAugust 2013
dc.identifier.urihttp://hdl.handle.net/1853/52158
dc.description.abstractHeterogeneous nanostructures such as coaxial nanotubes, nanowires and nanorods have been of growing interest due to their potential for high energy-conversion efficiencies and charge/discharge rates in solar cell, energy storage and fuel cell applications. Their superior properties at nanoscale as well as their high surface area, fast charge transport along large interfacial contact areas, and short charge diffusion lengths have made them attractive components for next generation high efficiency energy-conversion devices. The primary focus of this work was to understand the doping mechanism of TiO2 nanotube exclusively with strontium as an alkaline earth metal to shine light on the relation between the observed enhancement in photocatalytic properties of doped TiO2 nanotubes and its structural and electronic characteristics. The mechanism of Sr incorporation into the TiO2 nanotube structure with the hypothesis of possibility of phase segregation has been explored in low concentrations as a dopant and in very high concentrations by processing of SrTiO3 nanotube arrays. Detailed experimental examination of the bulk and surface of the Sr-doped nanotubes has been performed to understand the effect of dopant on electronic structure and optical properties of the TiO2 nanotubes. Moreover, in order to minimize the polarizations associated with the ionic/electronic charge transport in the electrolyte and anode of solid oxide fuel cells (SOFCs), a new platform is developed using vertically oriented metal oxide nanotube arrays. This novel platform, which is made of coaxial oxide nanotubes on silicon substrates, has the potential to simultaneously lower the operating temperature and production cost leading to significant enhancement in the performance of micro-SOFCs.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectTiO2 nanotubes
dc.subjectDoping
dc.subjectSrTiO3
dc.subjectSolid oxide fuel cells
dc.titleDevelopment of novel heteronanostructures engineered for electrochemical energy conversion devices
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentMaterials Science and Engineering
dc.embargo.terms2014-08-01
thesis.degree.levelDoctoral
dc.contributor.committeeMemberLiu, Meilin
dc.contributor.committeeMemberAhzi, Said
dc.contributor.committeeMemberSandhage, Kenneth H.
dc.contributor.committeeMemberAlamgir, Faisal M.
dc.contributor.committeeMemberJacob, Karl I.
dc.contributor.committeeMemberKhaleel, Mohammad A.
dc.date.updated2014-08-27T13:31:38Z


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