Ligand-Dependent Colloidal Stability Controls the Growth of Aluminum Nanocrystals

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dc.citation.firstpage1716en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitleJournal of the American Chemical Societyen_US
dc.citation.lastpage1724en_US
dc.citation.volumeNumber141en_US
dc.contributor.authorClark, Benjamin D.en_US
dc.contributor.authorDeSantis, Christopher J.en_US
dc.contributor.authorWu, Gangen_US
dc.contributor.authorRenard, Daviden_US
dc.contributor.authorMcClain, Michael J.en_US
dc.contributor.authorBursi, Lucaen_US
dc.contributor.authorTsai, Ah-Limen_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorHalas, Naomi J.en_US
dc.contributor.orgLaboratory for Nanophotonicsen_US
dc.date.accessioned2019-08-16T14:47:26Zen_US
dc.date.available2019-08-16T14:47:26Zen_US
dc.date.issued2019en_US
dc.description.abstractThe precise size- and shape-controlled synthesis of monodisperse Al nanocrystals remains an open challenge, limiting their utility for numerous applications that would take advantage of their size and shape-dependent optical properties. Here we pursue a molecular-level understanding of the formation of Al nanocrystals by titanium(IV) isopropoxide-catalyzed decomposition of AlH3ﾠin Lewis base solvents. As determined by electron paramagnetic resonance spectroscopy of intermediates, the reaction begins with the formation of Ti3+-AlH3ﾠcomplexes. Proton nuclear magnetic resonance spectroscopy indicates isopropoxy ligands are removed from Ti by Al, producing aluminum(III) isopropoxide and low-valent Ti3+ﾠcatalysts. These Ti3+ﾠspecies catalyze elimination of H2ﾠfrom AlH3ﾠinducing the polymerization of AlH3ﾠinto colloidally unstable low-valent aluminum hydride clusters. These clusters coalesce and grow while expelling H2ﾠto form colloidally stable Al nanocrystals. The colloidal stability of the Al nanocrystals and their size is determined by the molecular structure and density of coordinating atoms in the reaction, which is controlled by choice of solvent composition.en_US
dc.identifier.citationClark, Benjamin D., DeSantis, Christopher J., Wu, Gang, et al.. "Ligand-Dependent Colloidal Stability Controls the Growth of Aluminum Nanocrystals." <i>Journal of the American Chemical Society,</i> 141, no. 4 (2019) American Chemical Society: 1716-1724. https://doi.org/10.1021/jacs.8b12255.en_US
dc.identifier.doihttps://doi.org/10.1021/jacs.8b12255en_US
dc.identifier.urihttps://hdl.handle.net/1911/106252en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.titleLigand-Dependent Colloidal Stability Controls the Growth of Aluminum Nanocrystalsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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