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. 2020 Mar 5;11:1207. doi: 10.1038/s41467-020-15004-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Bactericidal activity of CV&[Au₂₅(Cys)₁₈] after removal of reactive oxygen species (ROS) containing superoxide (O₂^-), hydrogen peroxide (H₂O₂), and singlet oxygen (¹O₂). CV&[Au₂₅(Cys)₁₈] samples were exposed to white light source with an intensity of 312 lux on average for 6 h (n=6 independent samples). CV indicates crystal violet. b Time-resolved ¹O₂ phosphorescence decay on control, CV only, and [CV&Au₂₅(Cys)₁₈] (λ_Ex = 532 nm, λ_Em = 1270 nm). The phosphorescence decay was analysed using PicoQuant Fluofit software. Data in (a) presented as mean ± SD. Blue star represents below detection limit: <10² CFU mL⁻¹.