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We report on the ion beam fabrication of all-carbon multi electrode arrays(MEAs) based on 16 graphitic micro-channels embedded in single-crystal diamond(SCD) substrates. The fabricated SCD-MEAs are systematically employed for thein vitro simultaneous amperometric detection of the secretory activity frompopulations of chromaffin cells, demonstrating a new sensing approach withrespect to standard techniques. The biochemical stability and biocompatibilityof the SCD-based device combined with the parallel recording ofmulti-electrodes array allow: i) a significant time saving in data collectionduring drug screening and/or pharmacological tests over a large number ofcells, ii) the possibility of comparing altered cell functionality among cellpopulations, and iii) the repeatition of acquisition runs over many cycles witha fully non-toxic and chemically robust bio-sensitive substrate.

All-carbon multi-electrode array for real-time in vitro measurements of oxidizable neurotransmitters