Carbon coated magnetite nanoparticles with improved water-dispersion and peroxidase-like activity for colorimetric sensing of glucose

- A nanocomposite-based peroxidase mimic with typical core-shell structure was developed.
- The presence of carbon shell improves greatly the water-dispersion of the nanocomposite.
- The synergetic interaction of magnetic core and carbon shell affords Fe3O4@C to enhanced catalytic activity.
- A peroxidase-like Fe3O4@C-based colorimetric method for glucose detection was developed.