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Ligand-induced chirality in asymmetric CdSe/CdS nanostructures: a close look at chiral tadpoles

hal.structure.identifierDepartment of Electrical and Electronic Engineering
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierSchool of Materials Science and Engineering
dc.contributor.authorHAO, Junjie
hal.structure.identifierSchool of Materials Science and Engineering
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorLI, Yiwen
hal.structure.identifierInstitut für Energie- und Klimaforschung - Photovoltaik [IEK-5]
dc.contributor.authorMIAO, Jun
hal.structure.identifierShenzhen Institute of Artificial Intelligence and Robotics for Society [AIRS]
dc.contributor.authorLIU, Rulin
hal.structure.identifierShenzhen Institute of Artificial Intelligence and Robotics for Society [AIRS]
dc.contributor.authorLI, Jiagen
hal.structure.identifierDepartment of Electrical and Electronic Engineering
dc.contributor.authorLIU, Haochen
hal.structure.identifierSchool of Materials Science and Engineering
dc.contributor.authorWANG, Qiushi
hal.structure.identifierCollege of Physics and Optoelectronic Engineering
dc.contributor.authorLIU, Huan
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELVILLE, Marie-Hélène
hal.structure.identifierCollege of Physics and Optoelectronic Engineering
dc.contributor.authorHE, Tingchao
hal.structure.identifierDepartment of Electrical and Electronic Engineering
dc.contributor.authorWANG, Kai
hal.structure.identifierShenzhen Institute of Artificial Intelligence and Robotics for Society [AIRS]
dc.contributor.authorZHU, Xi
hal.structure.identifierSchool of Materials Science and Engineering
dc.contributor.authorCHENG, Jiaji
dc.date.issued2020
dc.identifier.issn1936-0851
dc.description.abstractEnLigand-induced chirality in asymmetric CdSe/CdS core–shell nanocrystals (NCs) has been extensively applied in chiral biosensors, regioselective syntheses and assemblies, circularly polarized luminescence (CPL), and chiroptic-based devices due to their excellent physiochemical properties, such as the tunable quantum confinement effects, surface functionality, and chemical stability. Herein, we present CdSe/CdS NCs with various morphologies such as nanoflowers, tadpoles, and dot/rods (DRs) with chirality induced by surface chiral ligands. The observed circular dichroism (CD) and CPL activities are closely associated with the geometrical characteristics of the nanostructures, such as the shell thickness and the aspect ratio of the CdSe/CdS NCs. Furthermore, in situ observations of the growth of tadpoles with a single tail indicate that the CD response is mainly attributed to the CdS shell, which has a maximum tail length of ∼45 nm (approximately λ/10 of the incident light wavelength). On the other hand, the CPL activity is only related to the CdSe core, and the activity benefits from a thin CdS shell with a relatively high photoluminescence quantum yield (QY). Further theoretical models demonstrated the aspect-ratio-dependent g-factor and QY variations in these asymmetric nanostructures. These findings provide insights into not only the asymmetric synthesis of CdSe/CdS NCs, but also the rational design of CdSe/CdS nanostructures with tunable CD and CPL activities.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enligand-induced chirality
dc.subject.enCdSe/CdS core−shell nanocrystals
dc.subject.encircularly polarized luminescence
dc.subject.encircular dichroism
dc.subject.ennanoflowers
dc.subject.entadpoles
dc.title.enLigand-induced chirality in asymmetric CdSe/CdS nanostructures: a close look at chiral tadpoles
dc.typeArticle de revue
dc.identifier.doi10.1021/acsnano.0c03909
dc.subject.halChimie/Matériaux
bordeaux.journalACS Nano
bordeaux.page10346–10358
bordeaux.volume14
bordeaux.issue8
bordeaux.peerReviewedoui
hal.identifierhal-02924169
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02924169v1
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