Details

Autor(en) / Beteiligte

• Liu, Yushen
• Sun, Mengyue
• Qiao, Wenteng
• Cong, Shuang
• Zhang, Yunqian
• Wang, Luliang
• Hu, Zhenhua
• Liu, Fangjie
• Wang, Dacheng
• Wang, Ping
• Liu, Quanwen

Titel

Multicolor colorimetric visual detection of Staphylococcus aureus based on Fe3O4–Ag–MnO2 composites nano-oxidative mimetic enzyme

Ist Teil von

• Analytica chimica acta, 2023-01, Vol.1239, p.340654-340654, Article 340654

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Novel Fe3O4–Ag–MnO2 composites were successfully synthesized. It was noteworthy that the obtained Fe3O4–Ag–MnO2 composites were found to possess three types of enzyme-mimicking activities, including peroxidase-like, catalase-like and oxidase-like activities. Taking advantage of the oxidase properties of Fe3O4–Ag–MnO2, the direct oxidation of TMB could be catalyzed to generate blue oxidation products without H2O2. The oxidase-like activity of Fe3O4–Ag–MnO2 were carefully studied. Based on the Fe3O4–Ag–MnO2-TMB system, a fast, sensitive and intuitive multicolor colorimetric method for Staphylococcus aureus (S. aureus) detection was established under the optimized conditions. The proposed method allows the detection of S. aureus with a detection limit of 3.7 cfu mL−1 and a linear range of 10–106 cfu mL−1. This new colorimetric method has been successfully proved to be applicable to the detection S. aureus of food samples. [Display omitted] •Multimetallic nanocomposite Fe3O4–Ag–MnO2 was synthesized.•Fe3O4–Ag–MnO2 possesses POD, CAT and oxidase-mimicking activities.•This detection method shows better results than other methods in terms of sensitivity, detection time and operation steps.•This detection method also shows excellent detection results in detecting spiked milk and meat samples.•The detection method has the potential to be suitable for on-site screening.