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• W4313311953 startingPage "127" @default.
• W4313311953 abstract "Carbon nanodots can function as photosensitizers that have the ability to generate reactive oxygen species such as singlet oxygen, hydroxy (OH) radicals, and superoxide ions. However, most of these can only be generated upon ultraviolet light excitation. Additionally, the mechanism of reactive oxygen species generation by carbon nanodots remains unclear. The development of carbon nanodots that can photosensitize under visible light irradiation is desirable for applications such as photodynamic therapy and pollutant decomposition under visible light. Here, we report novel carbon nanodot-based photosensitizers that generate reactive oxygen species under visible light; they were synthesized using a solvothermal method with two solvents (formamide and water) and amidol as the carbon source. Carbon nanodots from the solvothermal synthesis in formamide showed blue fluorescence, while those obtained in water showed green fluorescence. The photo-excited blue-fluorescent carbon nanodots produced OH radicals, superoxide ions, and singlet oxygen, and therefore could function as both type I and type II photosensitizers. In addition, photo-excited green-fluorescent carbon nanodots generated only singlet oxygen, therefore functioning as type II photosensitizers. It is proposed that the two photosensitizers have different origins of reactive oxygen species generation: the enrichment of graphitic N for blue-fluorescent carbon nanodots and molecular fluorophores for green-fluorescent carbon nanodots." @default.
• W4313311953 created "2023-01-06" @default.
• W4313311953 creator A5000411870 @default.
• W4313311953 creator A5021550995 @default.
• W4313311953 date "2023-01-07" @default.
• W4313311953 modified "2023-10-16" @default.
• W4313311953 title "Carbon nanodots with a controlled N structure by a solvothermal method for generation of reactive oxygen species under visible light" @default.
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• W4313311953 doi "https://doi.org/10.1002/bio.4428" @default.
• W4313311953 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36581317" @default.
• W4313311953 hasPublicationYear "2023" @default.
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