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- W2743226919 endingPage "10161" @default.
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- W2743226919 abstract "Before graphene derivatives can be exploited as next-generation antimicrobials, we must understand their behavior under environmental conditions. Here, we demonstrate how exposure to simulated sunlight significantly enhances the antibacterial activity of graphene oxide (GO) and reveal the underlying mechanism. Our measurements of reactive oxygen species (ROS) showed that only singlet oxygen (1O2) is generated by GO exposed to simulated sunlight, which contributes only slightly to the oxidation of antioxidant biomolecules. Unexpectedly, we find the main cause of oxidation is light-induced electron-hole pairs generated on the surface of GO. These light-induced electrons promote the reduction of GO, introducing additional carbon-centered free radicals that may also enhance the antibacterial activities of GO. We conclude that GO-mediated oxidative stress mainly is ROS-independent; simulated sunlight accelerates the transfer of electrons from antioxidant biomolecules to GO, thereby destroying bacterial antioxidant systems and causing the reduction of GO. Our insights will help support the development of graphene for antibacterial applications." @default.
- W2743226919 created "2017-08-17" @default.
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- W2743226919 date "2017-08-21" @default.
- W2743226919 modified "2023-10-15" @default.
- W2743226919 title "Light-Enhanced Antibacterial Activity of Graphene Oxide, Mainly via Accelerated Electron Transfer" @default.
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- W2743226919 doi "https://doi.org/10.1021/acs.est.7b00663" @default.
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