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Enhanced visible light-triggered antibacterial activity of carbon quantum dots/polyurethane nanocomposites by gamma rays induced pre-treatment

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dc.title Enhanced visible light-triggered antibacterial activity of carbon quantum dots/polyurethane nanocomposites by gamma rays induced pre-treatment en
dc.contributor.author Budimir, Milica
dc.contributor.author Marković, Zoran
dc.contributor.author Vajďák, Jan
dc.contributor.author Jovanović, Svetlana
dc.contributor.author Kubát, Pavel
dc.contributor.author Humpolíček, Petr
dc.contributor.author Mičušik, Matej
dc.contributor.author Danko, Martin
dc.contributor.author Barras, Alexandre
dc.contributor.author Milivojević, Dušan
dc.contributor.author Špitalsky, Zdenko
dc.contributor.author Boukherroub, Rabah
dc.contributor.author Marković, Biljana Todorović
dc.relation.ispartof Radiation Physics and Chemistry
dc.identifier.issn 0969-806X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2021
utb.relation.volume 185
dc.type article
dc.language.iso en
dc.publisher Elsevier Ltd
dc.identifier.doi 10.1016/j.radphyschem.2021.109499
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0969806X21001493
dc.subject polymer-matrix composite en
dc.subject carbon quantum dots en
dc.subject gamma-irradiation en
dc.subject reactive oxygen species en
dc.subject antibacterial photodynamic therapy en
dc.description.abstract Persistent microbial contamination of medical implant surfaces is becoming a serious threat to public health. This is principally due to antibiotic-resistant bacterial strains and the formation of bacterial biofilms. The development of novel antibacterial materials that will effectively fight both Gram-positive and Gram-negative bacteria and prevent biofilm formation represents a big challenge for researchers in the last few decades. In the present work, we report an antibacterial hydrophobic carbon quantum dots/polyurethane nanocomposite (hCQD-PU), with enhanced antibacterial properties induced by pre-treatment with gamma-irradiation. Hydrophobic quantum dots (hCQDs), which are capable of generating reactive oxygen species (ROS) upon irradiation with low-power blue light (470 nm), have been integrated into the polyurethane (PU) polymer matrix to form a photoactive nanocomposite. To modify its physical and chemical properties and improve its antibacterial efficacy, various doses of gamma irradiation (1, 10, and 200 kGy) in the air environment were applied to the formed nanocomposite. Gamma-irradiation pre-treatment significantly influenced the rise in ROS production, therefore, the prooxidative activity under the blue-light illumination of hCQD-PU was also significantly improved. The best antibacterial activity was demonstrated by the hCQD-PU nanocomposite irradiated with a dose of 200 kGy, with the complete eradication of Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) bacteria after 15 min of exposure to the blue lamp. © 2021 Elsevier Ltd en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1010331
utb.identifier.scopus 2-s2.0-85105360471
utb.identifier.wok 000655300100004
utb.identifier.coden RPCHD
utb.source j-scopus
dc.date.accessioned 2021-05-25T11:04:51Z
dc.date.available 2021-05-25T11:04:51Z
dc.description.sponsorship Ministry of Education, Science and Technological Development of the Republic of Serbia [451039/202114/200017]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Vajďák, Jan
utb.contributor.internalauthor Humpolíček, Petr
utb.fulltext.sponsorship The research was funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant No. 451-03-9/2021-14/200017 ).
utb.wos.affiliation [Budimir, Milica] Univ Belgrade, Sch Elect Engn, Bulevar Kralja Aleksandra 73, Belgrade 11000, Serbia; [Budimir, Milica; Markovic, Zoran; Jovanovic, Svetlana; Milivojevic, Dusan; Markovic, Biljana Todorovic] Univ Belgrade, Natl Inst Republ Serbia, Vinca Inst Nucl Sci, Dept Radiat Chem & Phys, Belgrade 11001, Serbia; [Budimir, Milica; Barras, Alexandre; Boukherroub, Rabah] Univ Lille, Univ Polytech Hauts de France, Cent Lille, CNRS,UMR 8520,IEMN, F-59000 Lille, France; [Vajdak, Jan; Humpolicek, Petr] Tomas Bata Univ Zlin, Ctr Polymer Syst, Trida Tomase Bati 5678, Zlin, Czech Republic; [Micusik, Matej; Danko, Martin; Spitalsky, Zdenko] Slovak Acad Sci, Polymer Inst, Dubravska Cesta 9, Bratislava 84541, Slovakia; [Kubat, Pavel] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, Dolejskova 3, Prague 18223 8, Czech Republic
utb.scopus.affiliation School of Electrical Engineering, University of Belgrade, Bulevar kralja Aleksandra 73Belgrade 11000, Serbia; Department of Radiation Chemistry and Physics, “Vinca” Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, 11001, Serbia; Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, IEMN, UMR 8520, Lille, F-59000, France; Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati, Zlin, 5678, Czech Republic; Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9Bratislava 84541, Slovakia; J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, Praha 8, 182 23, Czech Republic
utb.fulltext.projects 451-03-9/2021-14/200017
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