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- W2058604759 abstract "The calcium-free bioactive borophosphate glasses were doped with Ag2O in order to improve their properties with antibacterial activity. The samples belonging to the system (100 − x)[10B2O3·30Na2O·60P2O5]xAg2O, with 0 ≤ x ≤ 2, were obtained by melt-derived technique and characterized by X-ray diffraction, UV–vis spectroscopy, transmission electron microscopy and Raman spectroscopy and afterwards their aseptic character was assessed. The Listeria monocytogenes were used to test the antibacterial effect of the undoped and silver-doped glasses. Important structural changes induced by the Ag2O addition to the bioactive glass composition have been identified especially for the samples containing a small amount of silver oxide (x = 0.1) and for the highest Ag2O content (x = 2). By varying the silver amount the presence of different silver species was observed, i.e. Ag+, Ag0, isolated Ag nanoparticles and aggregated Ag nanoparticles. The Ag+ and Ag0 species were present in all silver containing samples, while the existence of isolated Ag nanoparticles was observed only for x = 1, 1.5 and 2 mol% Ag2O. It was found that the glasses containing silver-oxide content between 0.2 and 1 mol% exhibit a relatively increased antibacterial activity, while the samples with 1.5 and 2 mol% Ag2O were found to exhibit a reduced antibacterial effect against L. monocytogenes. This behavior can be associated with the appearance of the small silver nanoparticle clusters in the glass system." @default.
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- W2058604759 date "2014-10-01" @default.
- W2058604759 modified "2023-10-18" @default.
- W2058604759 title "The silver influence on the structure and antibacterial properties of the bioactive 10B2O3−30Na2O−60P2O2 glass" @default.
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- W2058604759 doi "https://doi.org/10.1016/j.jnoncrysol.2014.05.033" @default.
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