Accurate Monitoring Platform for the Surface Catalysis of Nanozyme Validated by Surface-Enhanced Raman-Kinetics Model

References

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679Accurate Monitoring Platform for the Surface Catalysis of Nanozyme Validated by Surface-Enhanced Raman-Kinetics Modelhttps://doi.org/10.1021/acs.analchem.0c01886CompositeIn the present study, we successfully obtained an excellent semiconducting SERS substrate, reduced MnCo2O4 (R-MnCo2O4) nanotubes, whose favorable SERS sensitivity is mainly related to the promoted interfacial charge transfer caused by the introduction of oxygen vacancies as well as the electromagnetic enhancement effect. Furthermore, the R-MnCo2O4 nanotubes showed a favorable oxidase-like activity toward oxidation with the aid of molecular oxygen.

Materials

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BET
b nanozyme
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679R-MnCo2O4nmTEMFigure 1a,c shows the typical TEM images of the MnCo2O4 and R-MnCo2O4 nanotubes, respectively. Furthermore, three characteristic d-spacing values of approximately 0.25, 0.30, and 0.48 nm are observed in the HRTEM images of the MnCo2O4 nanotubes, which can be ascribed to the (311), (220), and (111) planes, respectively (Figure 1b).

Kinetics

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679R-MnCo2O4OXDTMB0.14mM14-8M/s679

Applications

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679R-MnCo2O4construct highly sensitive biosensors.TMBColor