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Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains
dc.creator | Dorontic, Sladjana | |
dc.creator | Bonasera, Aurelio | |
dc.creator | Scopelliti, Michelangelo | |
dc.creator | Marković, Olivera S. | |
dc.creator | Bajuk Bogdanović, Danica | |
dc.creator | Ciasca, Gabriele | |
dc.creator | Romanò, Sabrina | |
dc.creator | Dimkić, Ivica | |
dc.creator | Budimir, Milica | |
dc.creator | Marinković, Dragana | |
dc.creator | Jovanovic, Svetlana | |
dc.date.accessioned | 2023-05-09T09:38:50Z | |
dc.date.available | 2023-05-09T09:38:50Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 2079-4991 | |
dc.identifier.uri | http://cherry.chem.bg.ac.rs/handle/123456789/5883 | |
dc.description.abstract | Structural modification of different carbon-based nanomaterials is often necessary to improve their morphology and optical properties, particularly the incorporation of N-atoms in graphene quantum dots (GQDs). Here, a clean, simple, one-step, and eco-friendly method for N-doping of GQDs using gamma irradiation is reported. GQDs were irradiated in the presence of the different ethylenediamine (EDA) amounts (1 g, 5 g, and 10 g) and the highest % of N was detected in the presence of 10 g. N-doped GQDs emitted strong, blue photoluminescence (PL). Photoluminescence quantum yield was increased from 1.45, as obtained for non-irradiated dots, to 7.24% for those irradiated in the presence of 1 g of EDA. Modified GQDs were investigated as a PL probe for the detection of insecticide Carbofuran (2,2-Dimethyl-2,3-dihydro-1-benzofuran-7- yl methylcarbamate) and herbicide Amitrole (3-amino-1,2,4-triazole). The limit of detection was 5.4 µmol L−1 for Carbofuran. For the first time, Amitrole was detected by GQDs in a turn-off/turn-on mechanism using Pd(II) ions as a quenching agent. First, Pd(II) ions were quenched (turn-off) PL of GQDs, while after Amitrole addition, PL was recovered linearly with Amitrole concentration (turn-on). LOD was 2.03 µmol L−1 . These results suggest that modified GQDs can be used as an efficient new material for Carbofuran and Amitrole detection. Furthermore, the phototoxicity of dots was investigated on both Gram-positive and Gram-negative bacterial strains. When bacterial cells were exposed to different GQD concentrations and illuminated with light of 470 nm wavelength, the toxic effects were not observed. | sr |
dc.language.iso | en | sr |
dc.publisher | MDPI | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200017/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS// | sr |
dc.relation | The Italian Ministry of University and Research (MURST, ex-MIUR) is acknowledged by A.B. for funding his research activities (PON “AIM: Attrazione e Mobilità Internazionale”, call AIM1809078-2, CUP B78D19000280001) | sr |
dc.relation | The Ad vanced Technologies Network (ATeN) Center (University of Palermo; project “Mediterranean Center for Human Health Advanced Biotechnologies (CHAB)”, PON R&C 2007–2013) is also acknowledged for hospitality and service | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Nanomaterials | sr |
dc.subject | graphene quantum dots | sr |
dc.subject | N-doping | sr |
dc.subject | gamma-irradiation | sr |
dc.subject | photoluminescence | sr |
dc.subject | carbofuran | sr |
dc.subject | 3-amino-1,2,4-triazole | sr |
dc.subject | detection | sr |
dc.subject | antibacterial effects | sr |
dc.title | Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains | sr |
dc.type | article | sr |
dc.rights.license | BY | sr |
dc.citation.volume | 12 | |
dc.citation.spage | 2714 | |
dc.identifier.doi | https://doi.org/10.3390/nano12152714 | |
dc.citation.rank | M21 | |
dc.type.version | publishedVersion | sr |
dc.identifier.fulltext | http://cherry.chem.bg.ac.rs/bitstream/id/32732/bitstream_32732.pdf |