Nanoimprinted arrays of glassy carbon nanoelectrodes for improved electrochemistry of enzymatic redox-mediators

•Arrays of glassy carbon nanoelectrodes are prepared by nanoimprinting lithography.•They are designed to operate under total overlap diffusion conditions.•They provide high Faradaic signals and low capacitive current.•Achievable potential window is extended with respect to noble metal arrays.•Highly reversible responses are detected for oxidase and reductase redox mediators.