Mechanical Pressure Induced Chemical Cutting Of Boron Nitride Sheets Into Boron Nitride Quantum Dots And Optical Properties

dc.creatorKumar
dc.creatorR; Singh
dc.creatorRK; Yadav
dc.creatorSK; Savu
dc.creatorR; Moshkalev
dc.creatorSA
dc.date2016
dc.date2016-12-06T18:30:40Z
dc.date2016-12-06T18:30:40Z
dc.date.accessioned2018-03-29T02:03:14Z
dc.date.available2018-03-29T02:03:14Z
dc.identifier1873-4669
dc.identifierJournal Of Alloys And Compounds. ELSEVIER SCIENCE SA, n. 683, p. 38 - 45.
dc.identifier0925-8388
dc.identifierWOS:000378835200006
dc.identifier10.1016/j.jallcom.2016.05.073
dc.identifierhttp://www-sciencedirect-com.ez88.periodicos.capes.gov.br/science/article/pii/S0925838816313937
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/320090
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1310856
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThe ability to exfoliate 2D hexagonal boron nitride nanosheets (h-BNNSs) into nano-sized layered particles to form the boron nitride quantum dots (BNQDs) has been discussed by mechanical pressure through high intensity sonication. The top-down, simple and efficient synthesis approach has been applied for synthesis of BNQDs directly from bulk h-BN powder by high intensity sonication processes. The time dependent high intensity sonication shows the thinning of BNNSs or delaminated BNNSs are broken into nano-size in form of BNQDs. Higher ultrasonication time duration reduce the number of h-BN layers from h-BNNSs and produce the physical defects on the surface and finally transform into BNQDs. To evaluate the structural analysis and properties of BNQDs were employed by XRD, HRTEM, EDX, XPS, AFM and PL techniques. The average and uniform size of BNQDs observed from TEM analysis were 3-6 nm and containing an average thickness of 3-12 atomic BN layers. Raman spectroscopy confirms the formation of few layered BNQDs nanostructure from bulk h-BN powder by indicating the weak and small E-2g phonon mode (1365 cm(-1)). The photoluminescence (PL) measurements carried out of BNQDs show typical luminescence spectra and strong peak emission at 448 nm. (C) 2016 Elsevier B.V. All rights reserved.
dc.description683
dc.description
dc.description38
dc.description45
dc.descriptionCNPq (Brazil)
dc.descriptionFAPESP (Brazil)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description
dc.description
dc.description
dc.languageEnglish
dc.publisherELSEVIER SCIENCE SA
dc.publisherLAUSANNE
dc.relationJournal of Alloys and Compounds
dc.rightsfechado
dc.sourceWOS
dc.subjectBn Quantum Dots
dc.subjectUltra-high Sonication
dc.subjectExfoliation
dc.subjectSurface Defect
dc.subjectEdge Thinning
dc.titleMechanical Pressure Induced Chemical Cutting Of Boron Nitride Sheets Into Boron Nitride Quantum Dots And Optical Properties
dc.typeArtículos de revistas


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