{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/89171"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/89171","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Effects of metal ion–ligand interactions on the synthesis of metal nanostructures with controlled morphology","abstract":"Nanoparticles with well-defined morphology and composition have been studied extensively for their applications in catalysis, energy conversion, and beyond. The unique properties of nanocrystals often highly depend on their shape, size, and composition. Therefore, control of morphology is essential in the development of nanocrystal-based materials. Design of nanocrystals, however, is still difficult in solution-phase synthesis, largely due to insufficient knowledge of the controlling parameters for the synthesis. For metal nanoparticles, the interactions between metal ions and commonly used ligands in solution-phase synthesis are still not clear, nor are the effects of these interactions on the formation of metal nanocrystals. It is crucial to improve our understanding of the formation mechanisms of metal nanocrystals in order to produce nanocrystals with controlled morphology. This dissertation focuses on the metal ion–ligand interactions and the effects of these interactions on the formation of metal nanocrystals during solution-phase synthesis. Formation of metal ion–ligand complexes were investigated for the synthesis of Pd and Pt nanocrystals. Structures of metal–ligand intermediates that formed were identified using single-crystal X-ray diffraction, mass spectrometry, and UV–vis spectroscopy. Two-dimensional multilayered Pd nanosheets, Pt nanocubes, and Pd nanoplates with controlled morphology were synthesized. The adsorption of metal intermediates and ligands on Pd surfaces was studied using density-functional theory (DFT) calculations. The effects of metal ion–ligand interactions on the formation kinetics of Pt and Pd nanocrystals were analyzed quantitatively. The experimental data show that the metal ion–ligand interaction affected the synthesis of metal nanocrystals through the formation of metal–ligand intermediates, which controlled the anisotropic growth and formation kinetics of metal nanocrystals. These results provide molecular level understanding of the formation mechanism of metal nanocrystals, indicating that design of molecular precursors is an important factor in controlling the morphology of metal nanostructures.","abstract_html":"Nanoparticles with well-defined morphology and composition have been studied extensively for their applications in catalysis, energy conversion, and beyond. The unique properties of nanocrystals often highly depend on their shape, size, and composition. Therefore, control of morphology is essential in the development of nanocrystal-based materials. Design of nanocrystals, however, is still difficult in solution-phase synthesis, largely due to insufficient knowledge of the controlling parameters for the synthesis. For metal nanoparticles, the interactions between metal ions and commonly used ligands in solution-phase synthesis are still not clear, nor are the effects of these interactions on the formation of metal nanocrystals. It is crucial to improve our understanding of the formation mechanisms of metal nanocrystals in order to produce nanocrystals with controlled morphology. This dissertation focuses on the metal ion–ligand interactions and the effects of these interactions on the formation of metal nanocrystals during solution-phase synthesis. Formation of metal ion–ligand complexes were investigated for the synthesis of Pd and Pt nanocrystals. Structures of metal–ligand intermediates that formed were identified using single-crystal X-ray diffraction, mass spectrometry, and UV–vis spectroscopy. Two-dimensional multilayered Pd nanosheets, Pt nanocubes, and Pd nanoplates with controlled morphology were synthesized. The adsorption of metal intermediates and ligands on Pd surfaces was studied using density-functional theory (DFT) calculations. The effects of metal ion–ligand interactions on the formation kinetics of Pt and Pd nanocrystals were analyzed quantitatively. The experimental data show that the metal ion–ligand interaction affected the synthesis of metal nanocrystals through the formation of metal–ligand intermediates, which controlled the anisotropic growth and formation kinetics of metal nanocrystals. These results provide molecular level understanding of the formation mechanism of metal nanocrystals, indicating that design of molecular precursors is an important factor in controlling the morphology of metal nanostructures.","abstract_has_math":false,"creators":["Yin, Xi"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["Yang, Hong","Seebauer, Edmund G","Guironnet, Damien","Murphy, Catherine J"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-03-02T20:57:14Z","date_published":"2016-03-02T20:57:14Z","updated_at":"2026-07-22T22:26:32Z","subjects":["Nanoparticle","Metal ion","Ligand","Precusor","Molecular design","Growth kinetics","Formation kinetics","Palladium (Pd)","Platinum (Pt)","Nanosheets","Nanoplates","Nanocubes"],"languages":["en"],"rights":["Copyright 2015 Xi Yin"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/89171","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Yang, Hong","Seebauer, Edmund G","Guironnet, Damien","Murphy, Catherine J"]},{"key":"dc:creator","label":"Author","values":["Yin, Xi"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-03-02T20:57:14Z","2018-03-03T10:15:18Z","2015-08-31","2015-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Nanoparticle","Metal ion","Ligand","Precusor","Molecular design","Growth kinetics","Formation kinetics","Palladium (Pd)","Platinum (Pt)","Nanosheets","Nanoplates","Nanocubes"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Xi Yin"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/89171"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Nanoparticles with well-defined morphology and composition have been studied extensively for their applications in catalysis, energy conversion, and beyond. The unique properties of nanocrystals often highly depend on their shape, size, and composition. Therefore, control of morphology is essential in the development of nanocrystal-based materials. Design of nanocrystals, however, is still difficult in solution-phase synthesis, largely due to insufficient knowledge of the controlling parameters for the synthesis. For metal nanoparticles, the interactions between metal ions and commonly used ligands in solution-phase synthesis are still not clear, nor are the effects of these interactions on the formation of metal nanocrystals. It is crucial to improve our understanding of the formation mechanisms of metal nanocrystals in order to produce nanocrystals with controlled morphology. This dissertation focuses on the metal ion–ligand interactions and the effects of these interactions on the formation of metal nanocrystals during solution-phase synthesis. Formation of metal ion–ligand complexes were investigated for the synthesis of Pd and Pt nanocrystals. Structures of metal–ligand intermediates that formed were identified using single-crystal X-ray diffraction, mass spectrometry, and UV–vis spectroscopy. Two-dimensional multilayered Pd nanosheets, Pt nanocubes, and Pd nanoplates with controlled morphology were synthesized. The adsorption of metal intermediates and ligands on Pd surfaces was studied using density-functional theory (DFT) calculations. The effects of metal ion–ligand interactions on the formation kinetics of Pt and Pd nanocrystals were analyzed quantitatively. The experimental data show that the metal ion–ligand interaction affected the synthesis of metal nanocrystals through the formation of metal–ligand intermediates, which controlled the anisotropic growth and formation kinetics of metal nanocrystals. These results provide molecular level understanding of the formation mechanism of metal nanocrystals, indicating that design of molecular precursors is an important factor in controlling the morphology of metal nanostructures.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2017-12-01","The student, Xi Yin, accepted the attached license on 2015-08-30 at 18:28.","The student, Xi Yin, submitted this Dissertation for approval on 2015-08-30 at 18:44.","This Dissertation was approved for publication on 2015-08-31 at 15:54.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8679 on 2016-03-02 at 14:11:51","Made available in DSpace on 2016-03-02T20:57:14Z (GMT). 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The unique properties of nanocrystals often highly depend on their shape, size, and composition. Therefore, control of morphology is essential in the development of nanocrystal-based materials. Design of nanocrystals, however, is still difficult in solution-phase synthesis, largely due to insufficient knowledge of the controlling parameters for the synthesis. For metal nanoparticles, the interactions between metal ions and commonly used ligands in solution-phase synthesis are still not clear, nor are the effects of these interactions on the formation of metal nanocrystals. It is crucial to improve our understanding of the formation mechanisms of metal nanocrystals in order to produce nanocrystals with controlled morphology. This dissertation focuses on the metal ion–ligand interactions and the effects of these interactions on the formation of metal nanocrystals during solution-phase synthesis. Formation of metal ion–ligand complexes were investigated for the synthesis of Pd and Pt nanocrystals. Structures of metal–ligand intermediates that formed were identified using single-crystal X-ray diffraction, mass spectrometry, and UV–vis spectroscopy. Two-dimensional multilayered Pd nanosheets, Pt nanocubes, and Pd nanoplates with controlled morphology were synthesized. The adsorption of metal intermediates and ligands on Pd surfaces was studied using density-functional theory (DFT) calculations. The effects of metal ion–ligand interactions on the formation kinetics of Pt and Pd nanocrystals were analyzed quantitatively. The experimental data show that the metal ion–ligand interaction affected the synthesis of metal nanocrystals through the formation of metal–ligand intermediates, which controlled the anisotropic growth and formation kinetics of metal nanocrystals. These results provide molecular level understanding of the formation mechanism of metal nanocrystals, indicating that design of molecular precursors is an important factor in controlling the morphology of metal nanostructures.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2017-12-01","The student, Xi Yin, accepted the attached license on 2015-08-30 at 18:28.","The student, Xi Yin, submitted this Dissertation for approval on 2015-08-30 at 18:44.","This Dissertation was approved for publication on 2015-08-31 at 15:54.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8679 on 2016-03-02 at 14:11:51","Made available in DSpace on 2016-03-02T20:57:14Z (GMT). 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