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Keywords:

  • catalyst;
  • enzyme mimetic;
  • gold nanoclusters;
  • graphene oxide;
  • broad pH ranges;
  • cancer cell detection
Thumbnail image of graphical abstract

A synergistic graphene oxide–gold nanocluster (GO-AuNC) hybrid has been constructed as an enzyme mimic that is able to show high catalytic activity over a broad pH range, especially at neutral pH. Importantly, the target-functionalized hybrid has been applied as a robust nanoprobe for selective, quantitative, and fast colorimetric detection of cancer cells.