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• W3113105668 endingPage "238141" @default.
• W3113105668 startingPage "238141" @default.
• W3113105668 abstract "Abstract Hexavalent chromium ion (Cr6+) is highly toxic to human health and environment. Herein, high-performance detection of Cr6+ is of great import. In this study, a rapid and sensitive multicolor colorimetric method for detection of Cr6+ in aqueous solution was established on the basis of Cr6+ etching of gold nano-double cone@silver nanorods (Au NDC@Ag NRs). Au NDC@Ag NRs was synthesized by a modified seed-mediated growth method. The catalytic etching induced by Cr6+ changed the morphology of Au NDC@Ag NRs, leading to the attenuation of surface plasma resonance (SPR) and the redshift of absorption spectra. Meanwhile, Au NDC@Ag NRs exhibits obvious color changes from orange to pink, to purple, and finally becomes colorless with the increasing concentrations of Cr6+. With such a design, naked-eye detection of Cr6+ was realized with high sensitivity. The proposed multicolor sensing method showed a good linearity between the redshift change of absorption peak (△λ) and the concentrations of Cr6+ in the range from 2.5 to 40 μM. The limit of detection (LOD) was calculated as 1.69 μM in aqueous solution. In addition, successful detection of Cr6+ in tap water and Yangtze River water, indicating the real applications of Au NDC@Ag NRs probe in monitoring Cr6+ in environment." @default.
• W3113105668 created "2020-12-21" @default.
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• W3113105668 date "2021-03-01" @default.
• W3113105668 modified "2023-10-16" @default.
• W3113105668 title "Colorimetric detection of Cr6+ ions based on surface plasma resonance using the catalytic etching of gold nano-double cone @ silver nanorods" @default.
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• W3113105668 doi "https://doi.org/10.1016/j.aca.2020.12.016" @default.
• W3113105668 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33551058" @default.
• W3113105668 hasPublicationYear "2021" @default.
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