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Surface antibacterial activity of multi-walled carbon nanotubes with an intrinsic and radiation-induced disorderстатья
- Авторы: Elsehly E.M., Evseev A.P., Vorobyeva E.A., Balakshin Yu V., Nazarov A.V., Stepanov A.V., Dimitrieva A.I., Popov A.P., Kovalenko A.V., Yumanov D.S., Abo-Neima S., Chechenin N.G., Shemukhin A.A.
- Журнал: Diamond and Related Materials
- Год издания: 2023
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 109953
- DOI: 10.1016/j.diamond.2023.109953
- Аннотация: Various nanostructured materials have been assessed for their ability to prevent bacterial growth. This paper reports the effects of intrinsic defects and ion irradiation on the antibacterial activity of multi-walled carbon nanotubes (MWNTs) against Escherichia coli (E. coli). The results suggested that 0.4 mg/ml of irradiated MWNTs (R-MWNTs) is the optimal dose for maximal inhibition, with an inhibition rate of 92.5 %. The bactericidal performance of R-MWNTs was confirmed by the dielectric conductivity, bacterial growth, and surface wettability measurements. E. coli was sensitive to R-MWNTs by forming a 35 mm inhibitory zone at a dose of 0.4 mg/ml. The length and diameter of the R-MWNTs were significantly reduced compared to the initial samples. As indicated by transmission electron microscopy, R-MWNTs can biologically separate the pathogen cells from their environment, resulting in cell death. The enhancement of oxygen concentration after ion irradiation confirmed by energy dispersive spectroscopy. The induced defects on the surface of R-MWNTs were determined by Raman spectroscopy. These results suggest that irradiated MWNTs could be an alternative antimicrobial material against infectious bacteria. The novel irradiation technique improved the antibacterial properties of the MWNTs highlighting their potential applications in medical devices and industrial processes.
- Добавил в систему: Евсеев Александр Павлович