Atomic-scale investigation of polydiacetylene nanowires by scanning tunneling microscopy and spectroscopy

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dc.contributor.advisorKelly, Kevin F.en_US
dc.creatorGiridharagopal, Rajiven_US
dc.date.accessioned2018-12-03T18:32:46Zen_US
dc.date.available2018-12-03T18:32:46Zen_US
dc.date.issued2006en_US
dc.description.abstractNanowires comprised of polydiacetylene, a conjugated polymer, have been analyzed at the nanoscale using scanning tunneling microscopy (STM) and spectroscopy. STM analysis shows that these nanowires exhibit unique electronic behavior due to the different substrate electrode materials used, particularly graphite and molybdenum disulfide. The change in charge transfer behavior is evidence of the importance of polymer-electrode interactions. Nanowires are also shown to randomly desorb due to an interaction with the STM tip. A single disruption often results in the entire nanowire desorbing, and the underlying monolayer is reordered within milliseconds. Additionally, spectroscopic data has been acquired using a novel technique called alternating current STM (ACSTM). ACSTM allows for the acquisition of differential capacitance information. Analysis of the nanowires yields a peak in differential capacitance, as is typical of metal/insulator/semiconductor structures. The ACSTM is sensitive to both carrier concentration and dopant type, making it ideal for future metrological applications.en_US
dc.format.extent98 ppen_US
dc.identifier.callnoTHESIS E.E. 2007 GIRIDHARAGOPALen_US
dc.identifier.citationGiridharagopal, Rajiv. "Atomic-scale investigation of polydiacetylene nanowires by scanning tunneling microscopy and spectroscopy." (2006) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/103696">https://hdl.handle.net/1911/103696</a>.en_US
dc.identifier.digital305267888en_US
dc.identifier.urihttps://hdl.handle.net/1911/103696en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectPolymersen_US
dc.subjectElectrical engineeringen_US
dc.subjectMaterials scienceen_US
dc.subjectApplied sciencesen_US
dc.subjectPure sciencesen_US
dc.titleAtomic-scale investigation of polydiacetylene nanowires by scanning tunneling microscopy and spectroscopyen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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