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• W3133884478 endingPage "129708" @default.
• W3133884478 startingPage "129708" @default.
• W3133884478 abstract "• A portable sensing hydrogel loaded with Au@MnO 2 core-shell nanocomposites is prepared. • The colorimetric detection of total volatile basic nitrogen (TVB-N) is achieved based on the sensing hydrogel. • A smartphone combined with RGB analysis is applied to quantify the variation of TVB-N. • The hydrogel sensing platform is further used to non-invasive and portable monitoring fish freshness successfully. Total volatile basic nitrogen (TVB-N) content is the most widely used index for the assessment of fish freshness. Herein, a smartphone-integrated colorimetric sensor of TVB-N is developed based on a functional hydrogel loaded with Au@MnO 2 core-shell nanocomposites and β- d -glucose pentaacetate (β- d -GP). In the sensing hydrogel, Au@MnO 2 serves as a colorimetric substance and β- d -GP is a precursor of reducing agent. TVB-N can permeate the sensing hydrogel, causing an alkaline environment in which β- d -GP is hydrolyzed to produce β- d -glucose. A redox reaction between MnO 2 and β- d -glucose can occur and thus the TVB-N can induce the etching of MnO 2 layer of the Au@MnO 2 . Owing to the change of localized surface plasma resonance (LSPR) effect, the color of AuNPs changing from purple to red is easily distinguished by the naked eye. To quantify the variation conveniently, the color information is digitized by a smartphone combined with RGB analysis. The hydrogel sensing platform is further used for real-time monitoring of fish spoilage successfully. The introduction of smartphone avoids the usage of expensive instrument and opens a practical way for cost-effective, non-invasive, and portable monitoring of foodstuff freshness." @default.
• W3133884478 created "2021-03-15" @default.
• W3133884478 creator A5002774662 @default.
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• W3133884478 date "2021-05-01" @default.
• W3133884478 modified "2023-10-17" @default.
• W3133884478 title "A smartphone-integrated colorimetric sensor of total volatile basic nitrogen (TVB-N) based on Au@MnO2 core-shell nanocomposites incorporated into hydrogel and its application in fish spoilage monitoring" @default.
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• W3133884478 doi "https://doi.org/10.1016/j.snb.2021.129708" @default.
• W3133884478 hasPublicationYear "2021" @default.
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