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Synthesis of colloidal WSe2 nanocrystals: polymorphism control by precursor-ligand chemistry

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dc.contributor.author Zhou, Pengshang
dc.contributor.author Schiettecatte, Pieter
dc.contributor.author Vandichel, Matthias
dc.contributor.author Rousaki, Anastasia
dc.contributor.author Vandenabeele, Peter
dc.contributor.author Hens, Zeger
dc.contributor.author Singh, Shalini
dc.date.accessioned 2021-08-26T13:34:11Z
dc.date.available 2021-08-26T13:34:11Z
dc.date.issued 2021
dc.identifier.citation Zhou, Pengshang and Schiettecatte, Pieter and Vandichel, Matthias and Rousaki, Anastasia and Vandenabeele, Peter and Hens, Zeger and Singh, Shalini (2021) 'Synthesis of Colloidal WSe2 Nanocrystals: Polymorphism Control by Precursor-Ligand Chemistry'. Crystal Growth & Design, 0 (0). en_US
dc.identifier.uri http://hdl.handle.net/10344/10523
dc.description peer-reviewed en_US
dc.description.abstract Syntheses of transition-metal dichalcogenides (TMDs) using colloidal-chemistry approaches are gaining signifi cant interest in recent years, as these methods enable the morphology and properties of the nanocrystals to be tuned for targeted applications. In this work, by only varying the ligand used during synthesis, we synthesized nanoflowers with oleic acid (OA) and 1T′ phase dominated WSe2 nanosheets with oleylamine (OLA). WSe2 nanocrystals show slower rate of formation for the metastable 1T′ phase. Surface chemistry analyses of the synthesized nanocryst als by solution NMR establish that neither of the ligands bind strongly to the surface of nanocrystals but are in a dynamic coordination with the WSe2 surface. A further examination of the coordination of tungsten hexacarbonyl (W(CO)6) with the respective ligands confirms that W(CO)6 decomposes in OA, losing its octahedral symmetry, which leads to fast reactivity in the flask. In contrast to this, W(CO)6 reacts with OLA to form a new complex, which leads to slower reactivity and crystallization of the synthesized nanocrystals in the octahedral 1T′ phase. These insights into the influence of precursor-ligand chemistry on reaction outcome and the peculiar surface chemistry of colloidal TMD nanocrystals will be instrumental in developing future colloidal TMD nanocrystals. en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries Crystal Growth and Design;21 (3), pp. 1451-1460
dc.relation.uri https://doi.org/10.1021/acs.cgd.0c01036
dc.subject nanocrystals en_US
dc.subject synthesis en_US
dc.title Synthesis of colloidal WSe2 nanocrystals: polymorphism control by precursor-ligand chemistry en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2021-08-26T13:21:38Z
dc.description.version PUBLISHED
dc.identifier.doi 10.1021/acs.cgd.0c01036
dc.contributor.sponsor China Scholarship Council en_US
dc.contributor.sponsor Irish Centre for High-End Computing (ICHEC) en_US
dc.relation.projectid 01G01019 en_US
dc.relation.projectid 201607040064 en_US
dc.relation.projectid FWO17/PDO/ 184 en_US
dc.relation.projectid 121919N en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2985687
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Crystal Growth & Design
dc.description.status peer-reviewed


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