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dc.creatorJovanović, Svetlana P.
dc.creatorMarković, Zoran M.
dc.creatorBudimir, Milica
dc.creatorŠpitalsky, Zdenko
dc.creatorVidoeski, Bojan
dc.creatorTodorović-Marković, Biljana
dc.date.accessioned2018-03-01T16:48:57Z
dc.date.available2018-03-01T16:48:57Z
dc.date.issued2016
dc.identifier.issn0306-8919 (print)
dc.identifier.issn1572-817X (electronic)
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/1018
dc.description.abstractWe prepared graphene quantum dots (GQDs) using electrochemical approach. The luminescent properties of GQDs at various excitation wavelengths are examined. In order to study the possibility to improve these properties, we applied a low dose of gamma irradiation (15 kGy) on GQDs dissolved in two media: water and 4 % isopropyl alcohol solution. Upon gamma irradiation of water, various free radical species are formed and they usually cause oxidation. In the presence of isopropyl alcohol in water, during irradiation, oxygen contained radicals are quenched and only hydrogen radicals can survive and reduce the material exposed to irradiation. Morphology of GQDs is examined by atomic force and transmission electron microscopy. After gamma irradiation the increase of photoluminescence was noticed for both GQD samples. A higher intensity of photoluminescence is detected for GQDs irradiated in 4 % isopropyl alcohol solution. This result shows that further increase of gamma irradiation dose has a great potential for improvement of luminescence properties of GQDs.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172003/RS//
dc.relationbilateral collaboration project Serbia-Slovakia [SK-SRB-2013-0044 (451-03-545/2015-09/07)]
dc.rightsrestrictedAccessen
dc.sourceOptical and Quantum Electronicsen
dc.subjectGraphene quantum dotsen
dc.subjectPhotoluminescenceen
dc.subjectGamma irradiationen
dc.subjectAtomic force microscopyen
dc.titleEffects of low gamma irradiation dose on the photoluminescence properties of graphene quantum dotsen
dc.typearticleen
dcterms.abstractЈовановиц, Светлана; Марковић Зоран; Будимир Милица; Спиталскy, Зденко; Видоески Бојан; Тодоровић-Марковић Биљана;
dc.citation.volume48
dc.citation.issue4
dc.identifier.wos000374106400001
dc.identifier.doi10.1007/s11082-016-0516-z
dc.citation.otherArticle Number: 259
dc.citation.rankM23
dc.identifier.scopus2-s2.0-84962476946


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