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dc.contributor.supervisor Freund, Michael S.(Chemistry) en
dc.contributor.author Pillai, Rajesh Gopalakrishna
dc.date.accessioned 2010-10-13T14:36:24Z
dc.date.available 2010-10-13T14:36:24Z
dc.date.issued 2010-10-13T14:36:24Z
dc.identifier.citation Pillai, R. G.; Braun, M. D.; Freund, M. S. (2010) Langmuir, 26(1): 269–276 en
dc.identifier.citation Pillai, R. G.; Zhao, J. H.; Freund, M. S.; Thomson, D. J. (2008) Advanced Materials, 20(1): 49-53 en
dc.identifier.citation Zhao, J. H.; Thomson, D. J.; Pillai, R. G.; Freund, M. S. (2009) Applied Physics Letters 94(9): 092413 en
dc.identifier.uri http://hdl.handle.net/1993/4270
dc.description.abstract The research work presented in this thesis investigates the mechanistic details of conventional as well as electrochemically directed self-assembly of alkylthiosulfates and explores the use of conjugated semiconducting polymers for organic electronic applications. Here, the significance of the use of conjugated polymers is twofold; first, to explore their applications in nanoelectronics and second, the possibility of using them as a top contact on the self-assembled monolayers (SAMs) for molecular electronic applications. Throughout this work, deposition of the organic materials was performed on prefabricated device structures that required no further lithographic or metal deposition steps after modification of the electrodes with the organic molecules. Self-assembly of alkylthiosulfates on gold are reported to form monolayers identical to those formed from the corresponding alkanethiols. However, these self-assembly processes follow more complex mechanisms of monolayer formation than originally recognized. Studies on the mechanism of alkylthiosulfate chemisorption on gold shows that the self-assembly process is influenced by electrolyte and solvent. Plausible mechanisms have been proposed for the role of trace water in the solvent on conventional as well as electrochemically assisted self-assembly of alkylthiosulfates on gold. Electroanalytical and spectroscopic techniques have been used to explore the mechanistic details of electrochemically directed self-assembly of alkylthiosulfates on gold. It has been found that the self-assembly process is dynamic under electrochemical conditions and the heterogeneous electron transfer process between the organosulfur compound and gold is mediated through gold surface oxide and accompanied by corrosion. Conducting polymers are serious candidates for organic electronic applications since their properties can be controlled by the manipulation of molecular architecture. Unique electronic properties of conjugated polypyrrole hybrid materials (PPy0DBS-Li+) with immobile dopant anions and mobile cations have been observed and explained on the basis of movement of the cations in an applied electric field. Based on this principle, functioning polymer resistive memory devices have been demonstrated which can be scalable to lower dimensions for nanoelectronics applications. Finally, proof of concept for using a conducting polymer as a top contact in molecular electronic devices created using electrochemically directed self-assembly is demonstrated. en
dc.format.extent 9536151 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Self-assembly en
dc.subject Conducting polymers en
dc.subject Alkyl thiosulfate en
dc.subject Organic electronics en
dc.title Electrochemically directed self-assembly and conjugated polymer semiconductors for organic electronic applications en
dc.type info:eu-repo/semantics/doctoralThesis
dc.degree.discipline Chemistry en
dc.contributor.examiningcommittee Kraatz, Heinz-Bernhard (Chemistry, The University of Western Ontario) Thomson, Douglas J. (Electrical and Computer Engineering) Hegmann, Torsten (Chemistry) en
dc.degree.level Doctor of Philosophy (Ph.D.) en
dc.description.note February 2011 en


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