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dc.creatorJovanović, Svetlana
dc.creatorDorontić, Slađana
dc.creatorJovanović, Dragana
dc.creatorCiasca, Gabriele
dc.creatorBudimir, Milica
dc.creatorBonasera, Aurelio
dc.creatorScopelliti, Michelangelo
dc.creatorMarković, Olivera
dc.creatorTodorović Marković, Biljana
dc.date.accessioned2020-08-19T14:20:04Z
dc.date.available2022-07-06
dc.date.issued2020
dc.identifier.issn0272-8842
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/3621
dc.description.abstractDue to the low consumption of chemicals, the absence of toxic residual side products, the procedure simplicity and time-saving aspects, gamma irradiation offers advantages over the classical chemical protocols. We successfully employed gamma irradiation in order to introduce N-atoms in Graphene Quantum Dots (GQDs). By irradiating GQDs water dispersions in the presence of isopropyl alcohol and ethylenediamine, at doses of 25, 50 and 200 kGy, we attached amino groups onto GQDs in a single synthetic step. At the same time, a chemical reduction is achieved, too. Selected conditions induced incorporation of N-atoms within GDQs atomic lattice (around 3 at%), at all applied doses. Additionally, the C-atoms percentage was highly increased, from 63 to 79 at % or higher. The zeta potential of dots changed from −34.6 to +9.1 mV, due to the modification of functionalizing groups localized at the surface. Produced chemical changes lead to the desired alteration of the GQDs optical properties, such as an increased photoluminescence intensity, a higher photoluminescence quantum yields (from 2.07 to 18.40%) and a narrowing of the spectral features in the emission spectra. The ability of gamma-irradiated GQDs to quench free radical species was investigated and positively assessed; additionally, non-enzymatic optical detection of Cu(II) ions using GQDs as a sensor was studied and the detection limits areherein reported. These results suggest that GQDs can be potentially applied as smart photoluminescent sensors for metal cations.sr
dc.language.isoensr
dc.publisherElseviersr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200017/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//sr
dc.relationThe Italian Ministry of University and Research (MURST, ex-MIUR): PON “AIM: Attrazione e Mobilità Internazionale”, call AIM1809078-2, CUP B78D19000280001sr
dc.relationATeN Center (University of Palermo; project “Mediterranean Center for Human Health Advanced Biotechnologies (CHAB)” PON R&C 2007–2013)sr
dc.rightsembargoedAccesssr
dc.sourceCeramics Internationalsr
dc.subjectChemical propertiessr
dc.subjectOptical propertiessr
dc.subjectSensorsr
dc.subjectCarbonsr
dc.titleGamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensingsr
dc.typearticlesr
dc.rights.licenseBY-NC-NDsr
dcterms.abstractМарковић, Оливера; Тодоровић Марковић, Биљана; Бонасера, Aурелио; Сцопеллити, Мицхелангело; Јовановић, Светлана; Доронтић, Слађана; Јовановић, Драгана; Циасца, Габриеле; Будимир, Милица;
dc.rights.holderElseviersr
dc.citation.volume46
dc.citation.issue15
dc.citation.spage23611
dc.citation.epage23622
dc.citation.rankaM21~
dc.description.otherThis is the peer-reviewed version of the article: S. Jovanović, Slađ. Dorontić, D. Jovanović, G. Ciasca, M. Budimir, A. Bonasera, M. Scopelliti, O. Marković, B. Todorović Marković, Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing, Ceramics International (2020), 46, 15, 23611-23622 DOI: [https://doi.org/10.1016/j.ceramint.2020.06.133]
dc.description.otherThe published version: [http://cer.ihtm.bg.ac.rs/handle/123456789/3593]
dc.identifier.doi10.1016/j.ceramint.2020.06.133
dc.identifier.scopus2-s2.0-85087691750
dc.identifier.wos000564521900008
dc.type.versionacceptedVersionsr


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