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VO2 (A) : reinvestigation of crystal structure, phase transition and crystal growth mechanisms

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPOPURI, Srinivasa Rao
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorARTEMENKO, Alla
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLABRUGÈRE, Christine
hal.structure.identifierNational Institute for Research and Development in Electrochemistry and Condensed Matter [NIRDElCM]
dc.contributor.authorMICLAU, Marinela
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVILLESUZANNE, Antoine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPOLLET, Michaël
dc.date.issued2014
dc.identifier.issn0022-4596
dc.description.abstractEnWell crystallized VO2 (A) microrods were grown via a single step hydrothermal reaction in the presence of V2O5 and oxalic acid. With the advantage of high crystalline samples, we propose P4/ncc as an appropriate space group at room temperature. From morphological studies, we found that the oriented attachment and layer by layer growth mechanisms are responsible for the formation of VO2 (A) micro rods. The structural and electronic transitions in VO2 (A) are strongly first order in nature, and a marked difference between the structural transition temperatures and electronic transitions temperature was evidenced. The reversible intra- (LTP-A to HTP-A) and irreversible inter- (HTP-A to VO2 (M1)) structural phase transformations were studied by in-situ powder X-ray diffraction. Attempts to increase the size of the VO2 (A) microrods are presented and the possible formation steps for the flower-like morphologies of VO2 (M1) are described.
dc.language.isoen
dc.publisherElsevier
dc.subject.enHydrothermal synthesis
dc.subject.enVanadium dioxide polymorphs
dc.subject.enCrystal growth
dc.subject.enStructural and electronic transitions
dc.subject.enX-ray photoelectron spectroscopy
dc.title.enVO2 (A) : reinvestigation of crystal structure, phase transition and crystal growth mechanisms
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jssc.2014.01.037
dc.subject.halChimie/Chimie inorganique
dc.subject.halChimie/Cristallographie
bordeaux.journalJournal of Solid State Chemistry
bordeaux.page79-86
bordeaux.volume213
bordeaux.peerReviewedoui
hal.identifierhal-03691067
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03691067v1
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