دورية أكاديمية
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
| العنوان: | 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 |
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| المؤلفون: | Dorontić, Slađana, Bonasera, Aurelio, Scopelliti, Michelangelo, Marković, Olivera, Bajuk Bogdanović, Danica, Ciasca, Gabriele, Romanò, Sabrina, Dimkić, Ivica, Budimir, Milica, Marinković, Dragana, Jovanović, Svetlana P. |
| المصدر: | Nanomaterials |
| سنة النشر: | 2022 |
| المجموعة: | VinaR Repository (Vinča Institute of Nuclear Sciences / University of Belgrade) |
| مصطلحات موضوعية: | graphene quantum dots, N-doping, gamma-irradiation, photoluminescence, carbofuran, 3-amino-1,2,4-triazole, detection, antibacterial effects |
| الوصف: | Structural modification of different carbon-based nanomaterials is often necessary toimprove their morphology and optical properties, particularly the incorporation of N-atoms ingraphene quantum dots (GQDs). Here, a clean, simple, one-step, and eco-friendly method forN-doping of GQDs using gamma irradiation is reported. GQDs were irradiated in the presenceof the different ethylenediamine (EDA) amounts (1 g, 5 g, and 10 g) and the highest % of N wasdetected 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 asa 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 was5.4 µmol L−1for Carbofuran. For the first time, Amitrole was detected by GQDs in a turn-off/turn-onmechanism using Pd(II) ions as a quenching agent. First, Pd(II) ions were quenched (turn-off) PLof 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 anefficient new material for Carbofuran and Amitrole detection. Furthermore, the phototoxicity of dotswas investigated on both Gram-positive and Gram-negative bacterial strains. When bacterial cellswere exposed to different GQD concentrations and illuminated with light of 470 nm wavelength, thetoxic effects were not observed. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| تدمد: | 2079-4991 |
| العلاقة: | info:eu-repo/grantAgreement/ScienceFundRS/Ideje/7741955/RS//; info:eu-repo/grantAgreement/MESTD/inst-2020/200017/RS//; info:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//; Italian Ministry of University and Research (MURST, ex-MIUR) - [PON “AIM: Attrazione e Mobilità Internazionale”, call AIM1809078-2, CUP B78D19000280001]; ATeN Center [project “Mediterranean Center for Human Health Advanced Biotechnologies (CHAB)”, PON R&C 2007–2013]; https://vinar.vin.bg.ac.rs/handle/123456789/10406Test; 00083975480000; 2-s2.0-85136923871; http://vinar.vin.bg.ac.rs/bitstream/id/26846/bitstream_30949.pdfTest |
| DOI: | 10.3390/nano12152714 |
| الإتاحة: | https://doi.org/10.3390/nano12152714Test https://vinar.vin.bg.ac.rs/handle/123456789/10406Test http://vinar.vin.bg.ac.rs/bitstream/id/26846/bitstream_30949.pdfTest |
| حقوق: | openAccess ; https://creativecommons.org/licenses/by/4.0Test/ ; BY |
| رقم الانضمام: | edsbas.E2F60731 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20794991 |
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| DOI: | 10.3390/nano12152714 |