Enhanced performance of multilayer graphene platelet film via three dimensional configuration with efficient exposure of graphitic edge planes

• A scalable strategy to fabricate 3D graphene platelet film was described.
• The 3D graphene platelets possess a large number of exposed edge planes.
• The simultaneous determination of uric acid and ascorbic acid has been demonstrated.

Herein, we report a scalable strategy to fabricate a film of 3D multilayer graphene platelets by the carbonization of a polydopamine coating on a template of an aligned nanopore array formed by the electrochemical anodization on a stainless steel surface. The 3D graphene platelets possess a large number of exposed edge planes on the open ends as well as inner walls of the nanopores. The simultaneous voltammetric determination of uric acid (UA) and ascorbic acid (AA) has been demonstrated at the 3D multilayer graphene platelet film, with linear ranges of 50–2000 μM for AA and 5–500 μM for UA. Amperometric detection of dopamine illustrates a linear response in the range of 1–272 μM and a detection limit of 0.02 μM (S/N = 3).

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