Structural and optical properties of alloyed quaternary CdSeTeS core and CdSeTeS/ZnS core-shell quantum dots

dc.contributor.authorAdegoke, Oluwasesan
dc.contributor.authorNyokong, Tebello
dc.contributor.authorForbes, Patricia B.C.
dc.contributor.emailpatricia.forbes@up.ac.zaen_ZA
dc.date.accessioned2017-02-14T10:57:51Z
dc.date.available2017-02-14T10:57:51Z
dc.date.issued2015-10
dc.description.abstractSynthesis of fluorescent alloyed quantum dots (QDs) with unique optical properties suitable for a wide array of chemical, physical and biological applications is of research interest. In this work, highly luminescent and photostable alloyed quaternary CdSeTeS core QDs of two different sizes were fabricated via the organometallic hot-injection synthetic route. Characterization of the nanocrystals were performed using TEM, XRD, UV/vis and fluorescence spectrophotometric techniques. We have demonstrated in this work that the well fabricated alloyed quaternary CdSeTeS core QDs possess unique optical properties that are advantageous over conventional core/shell systems. Formation of the CdSeTeS/ZnS core/shell with the desired optical properties comes with a number of challenges, hence the advantages of the quaternary alloyed core over the core/shell QDs are (i) avoidance of the challenging process of determining the proper shell thickness which can provide the desired optical properties in the core/shell system and (ii) avoidance of the lattice-induced mismatch between the core and the shell material which can either lead to incomplete exciton confinement or dislocation at the core/shell interface.en_ZA
dc.description.departmentChemistryen_ZA
dc.description.librarianhb2017en_ZA
dc.description.sponsorshipA postdoctoral fellowship offered by the University of Pretoria is gratefully appreciated by O. Adegoke. This work is based on research supported in part by the National Research Foundation of South Africa, Grant Numbers: 92584, 90720 and 93394 (P. Forbes).en_ZA
dc.description.urihttp://www.elsevier.com/locate/jalcom/en_ZA
dc.identifier.citationAdegoke, O, Nyokong, T & Forbes, PBC 2015, 'Structural and optical properties of alloyed quaternary CdSeTeS core and CdSeTeS/ZnS core-shell quantum dots', Journal of Alloys and Compounds, vol. 645, pp. 443-449.en_ZA
dc.identifier.issn0925-8388 (print)
dc.identifier.issn1873-4669 (online)
dc.identifier.other10.1016/j.jallcom.2015.05.083
dc.identifier.urihttp://hdl.handle.net/2263/59034
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2015 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Alloys and Compounds, vol. 645, pp. 443-449, 2015. doi : 10.1016/j.jallcom.2015.05.083.en_ZA
dc.subjectCore/shellen_ZA
dc.subjectPhotoluminescenceen_ZA
dc.subjectQuantum yielden_ZA
dc.subjectAlloyen_ZA
dc.subjectQuantum dots (QDs)en_ZA
dc.titleStructural and optical properties of alloyed quaternary CdSeTeS core and CdSeTeS/ZnS core-shell quantum dotsen_ZA
dc.typePostprint Articleen_ZA

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