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- W2897749064 abstract "Here, we report the synthesis, characterization, and oxidase-like activity of Co3O4/CuO hollow nanocage (HNC) nanocomposites. The Co3O4/CuO HNCs were successfully prepared by hydrothermal treatment of ZIF-67 in copper nitrate solution, followed by carbonization in air. The obtained nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The Co3O4/CuO HNCs possess enhanced oxidase-like activity compared with pure Co3O4 and CuO, and they can catalytically oxidize the 3,3′,5,5′-tetramethylbenzidine (TMB) substrate in the absence of H2O2 to produce an intense blue product. Reactive oxygen species (ROS) measurements indicate that 1O2 and O2− radicals are the major ROS in catalytic oxidation of TMB by dissolved oxygen in the TMB–Co3O4/CuO HNC system. We then developed a simple, sensitive, visual, and colorimetric biosensing method for dopamine (DA) based on its inhibiting effect on TMB oxidation. The proposed method allows for DA detection with a limit of detection of 0.027 μM and a dynamic range of 0.05–8 μM. This new colorimetric method was successfully used to detect DA in biological samples. The present work demonstrates a simple strategy to fabricate an efficient oxidase mimic with potential applications in bioanalysis and clinical diagnosis." @default.
- W2897749064 created "2018-10-26" @default.
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- W2897749064 date "2019-01-01" @default.
- W2897749064 modified "2023-10-01" @default.
- W2897749064 title "Co3O4/CuO hollow nanocage hybrids with high oxidase-like activity for biosensing of dopamine" @default.
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- W2897749064 doi "https://doi.org/10.1016/j.msec.2018.10.038" @default.
- W2897749064 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30423772" @default.
- W2897749064 hasPublicationYear "2019" @default.
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