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Formation of mechanism and excitonic luminescence of supercritical-fluid-synthesized ZnO nanoparticles

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUSOLLE, Brian
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJUBERA, Veronique
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorILIN, Evgeniy
hal.structure.identifierCentre d'Etudes Lasers Intenses et Applications [CELIA]
dc.contributor.authorMARTIN, Patrick
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPHILIPPOT, Gilles
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSUCHOMEL, Matthew
hal.structure.identifierCenter for Integrated Materials Research
hal.structure.identifierInterdisciplinary Nanoscience Center [iNANO]
dc.contributor.authorIVERSEN, Bo
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARRE, Samuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorAYMONIER, Cyril
dc.date.issued2023
dc.identifier.issn0897-4756
dc.description.abstractEnExtensive research on nanosized ZnO has proven that its optical properties are challenging to control due to a number of possible defects producing various emissions in the visible range. Our group proposed a low-temperature, supercritical-fluid-driven synthesis of isotropic nanosized particles that exhibit a unique and unprecedentedly pure excitonic emission, comparable to that of single crystals. The present article reports the growth mechanism at the origin of the unexpectedly pure excitonic emission as well as a more detailed study of its optical properties at liquid helium temperatures. The ZnO phase is obtained via the thermal decomposition of an intermediate ZnO2 phase. No bulk defect luminescence is detected, and the synthesis route leaves a “ZnO2-like” surface able to neutralize the formation of surface defects, which can contribute to visible emissions. The luminescence measurements were performed at liquid helium temperature to enable the identification of excitons. The investigation of the photoluminescence properties confirms a strong excitonic emission in the UV region with no visible band and sheds light on a phonon coupling with the E2 high vibrational mode.
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.description.sponsorshipUniversity of Bordeaux Graduate Scholl in Light Sciences & Technologies
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enCrystal structure
dc.subject.enExcitons
dc.subject.enMetal oxide nanoparticles
dc.subject.enNanoparticles
dc.subject.enOxides
dc.title.enFormation of mechanism and excitonic luminescence of supercritical-fluid-synthesized ZnO nanoparticles
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.chemmater.3c00493
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page4057–4067
bordeaux.volume35
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-04098593
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04098593v1
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