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Keywords:

  • carbon;
  • electrochemistry;
  • diazonium salts;
  • electrografting;
  • Janus particles;
  • wireless deposition
Thumbnail image of graphical abstract

Glassy carbon beads are selectively functionalized on one side with an ultrathin organic layer by bipolar electrochemical reduction of diazonium salts to give Janus-type beads with a hybrid organic–inorganic composition (see scheme). The presence of the grafted organic layers is revealed either by co-adsorption of gold nanoparticles or by coupling with a fluorescent molecule.