{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/28334"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/28334","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"Investigating the properties of molecular wires on gold and diamond","abstract":"The self assembly and electron transport properties of various molecular films on different substrates were investigated in this thesis. In Chapter 3, we proved that the two-step strategy of coupling transition metal complexes to pyridine-terminated oligo(phenylene)ethynylene self-assembled monolayer formed well-ordered molecular assemblies using various surface characterization techniques. Electrical measurements revealed enhanced conductivity, rectification and negative differential resistance in the transition metal-OPP molecular films. In Chapter 4, theoretical simulations of the molecular wires based on the first-principles density functional theory and non-equilibrium Greenb s function revealed electrical properties consistent with the experimental results. In Chapter 5, we demonstrated strong rectification in assemblies of molecular dyads comprising a bithiophene segment as the photo-active electron donor and either a C60 or dicyano moiety as the electron acceptor in sandwich device structures. Diamond-based solar cells incorporating 2T-C60 molecular dyads were then studied using impedance spectroscopy under different lighting conditions and various applied dc potentials.","abstract_html":"The self assembly and electron transport properties of various molecular films on different substrates were investigated in this thesis. In Chapter 3, we proved that the two-step strategy of coupling transition metal complexes to pyridine-terminated oligo(phenylene)ethynylene self-assembled monolayer formed well-ordered molecular assemblies using various surface characterization techniques. Electrical measurements revealed enhanced conductivity, rectification and negative differential resistance in the transition metal-OPP molecular films. In Chapter 4, theoretical simulations of the molecular wires based on the first-principles density functional theory and non-equilibrium Greenb s function revealed electrical properties consistent with the experimental results. In Chapter 5, we demonstrated strong rectification in assemblies of molecular dyads comprising a bithiophene segment as the photo-active electron donor and either a C60 or dicyano moiety as the electron acceptor in sandwich device structures. Diamond-based solar cells incorporating 2T-C60 molecular dyads were then studied using impedance spectroscopy under different lighting conditions and various applied dc potentials.","abstract_has_math":false,"creators":["NG ZHAOYUE"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009-06-03","date_published":"2009-06-03","updated_at":"2026-07-24T03:32:43Z","subjects":["Molecular electronics;charge transport;organic-inorganic hybrid molecular wire;theoretical simulation;diamond-based solar cell;donor-acceptor dyad"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["NG ZHAOYUE"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2009-06-03"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/28334"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Molecular electronics;charge transport;organic-inorganic hybrid molecular wire;theoretical simulation;diamond-based solar cell;donor-acceptor dyad"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/656fd325-b92f-4196-95a4-3efdeb31c8f1/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The self assembly and electron transport properties of various molecular films on different substrates were investigated in this thesis. In Chapter 3, we proved that the two-step strategy of coupling transition metal complexes to pyridine-terminated oligo(phenylene)ethynylene self-assembled monolayer formed well-ordered molecular assemblies using various surface characterization techniques. Electrical measurements revealed enhanced conductivity, rectification and negative differential resistance in the transition metal-OPP molecular films. In Chapter 4, theoretical simulations of the molecular wires based on the first-principles density functional theory and non-equilibrium Greenb s function revealed electrical properties consistent with the experimental results. In Chapter 5, we demonstrated strong rectification in assemblies of molecular dyads comprising a bithiophene segment as the photo-active electron donor and either a C60 or dicyano moiety as the electron acceptor in sandwich device structures. 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Electrical measurements revealed enhanced conductivity, rectification and negative differential resistance in the transition metal-OPP molecular films. In Chapter 4, theoretical simulations of the molecular wires based on the first-principles density functional theory and non-equilibrium Greenb s function revealed electrical properties consistent with the experimental results. In Chapter 5, we demonstrated strong rectification in assemblies of molecular dyads comprising a bithiophene segment as the photo-active electron donor and either a C60 or dicyano moiety as the electron acceptor in sandwich device structures. 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