{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/80925"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/80925","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Excited-State Charge Transfer in Covalently Tethered Cadmium Chalcogenide Quantum Dot Heterostructures","abstract":"Ph.D.","abstract_html":"Ph.D.","abstract_has_math":false,"creators":["Wolfe II, Guy; 0000-0003-1624-4459"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Watson, David","Chemistry"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-10-29T16:48:12Z","date_published":"2019-10-29T16:48:12Z","updated_at":"2026-07-27T19:05:25Z","subjects":["chemistry","materials science","inorganic chemistry"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/80925","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Watson, David","Chemistry"]},{"key":"dc:creator","label":"Author","values":["Wolfe II, Guy; 0000-0003-1624-4459"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-10-29T16:48:12Z","2019","2019-08-09 09:48:23"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["chemistry","materials science","inorganic chemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/80925"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ph.D.","Semiconductor quantum dots (QDs) exhibit unusual properties, such as size-dependent molar absorptivities and bandgaps. In certain cases, QDs can allow for multiexcition generation and hot carrier extraction, making them prime candidates in solar energy conversion. The unusual properties of QDs are often exploited by incorporating them into QD-containing nanoscale assemblies, producing an energetic offset to promote charge separation. QDs often have a ligand shell, which is responsible for their colloidal stability and provides the possibility of tethering them to molecules or other materials, such as metal oxide films, nanowires, molecular acceptors, and other QDs. This dissertation focuses on the study of interfacial excited-state charge transfer within assemblies of cadmium chalcogenide QDs that are tethered together through their ligand shells by using a N,N'-dicyclohexylcarbodiimide-mediated coupling approach. In particular, excited-state charge transfer within 3 heterostructures was studied: (1) CdS-CdSe, a first generation heterostructure, (2) CdTe-CdSe, a second generation heterostructure, and (3) CdSe(lg)-CdSe(sm), a third generation heterostructure. CdSe-amide-CdS heterostructures were synthesized by using a carbodiimide-mediated formation of amide bonds between capping ligands on CdS QDs and CdSe QDs. The ligand shells of CdS and CdSe could be modified post-synthetically to contain an N-hydroxysuccinimide (NHS)-ester and primary amine moiety to promote the assembly of heterostructures. When CdS and CdSe were interfaced, trap-state emission from CdS was quenched significantly.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Excited-State Charge Transfer in Covalently Tethered Cadmium Chalcogenide Quantum Dot Heterostructures"]}]}],"canonical_facts":{"dc:contributor":["Watson, David","Chemistry"],"dc:creator":["Wolfe II, Guy; 0000-0003-1624-4459"],"dc:date":["2019-10-29T16:48:12Z","2019","2019-08-09 09:48:23"],"dc:description":["Ph.D.","Semiconductor quantum dots (QDs) exhibit unusual properties, such as size-dependent molar absorptivities and bandgaps. In certain cases, QDs can allow for multiexcition generation and hot carrier extraction, making them prime candidates in solar energy conversion. The unusual properties of QDs are often exploited by incorporating them into QD-containing nanoscale assemblies, producing an energetic offset to promote charge separation. QDs often have a ligand shell, which is responsible for their colloidal stability and provides the possibility of tethering them to molecules or other materials, such as metal oxide films, nanowires, molecular acceptors, and other QDs. This dissertation focuses on the study of interfacial excited-state charge transfer within assemblies of cadmium chalcogenide QDs that are tethered together through their ligand shells by using a N,N'-dicyclohexylcarbodiimide-mediated coupling approach. In particular, excited-state charge transfer within 3 heterostructures was studied: (1) CdS-CdSe, a first generation heterostructure, (2) CdTe-CdSe, a second generation heterostructure, and (3) CdSe(lg)-CdSe(sm), a third generation heterostructure. CdSe-amide-CdS heterostructures were synthesized by using a carbodiimide-mediated formation of amide bonds between capping ligands on CdS QDs and CdSe QDs. The ligand shells of CdS and CdSe could be modified post-synthetically to contain an N-hydroxysuccinimide (NHS)-ester and primary amine moiety to promote the assembly of heterostructures. When CdS and CdSe were interfaced, trap-state emission from CdS was quenched significantly.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/80925"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["chemistry","materials science","inorganic chemistry"],"dc:title":["Excited-State Charge Transfer in Covalently Tethered Cadmium Chalcogenide Quantum Dot Heterostructures"],"dc:type":["Text","Dissertation"]},"updated_at":"2026-07-27T19:05:25Z"}