Tailor designed exclusive carbon nanomaterial electrodes for off-chip and on-chip electrochemical detection

The authors describe tailor-designed electrodes based on the use of films of carbonaceous nanomaterials with demostrated conductivitiy at the microscale. These represent a unique conductive material for deposition on adaptable nonconductive substrates. Single-walled and multi-walled carbon nanotubes as well as graphene scaffold film electrodes (SFEs) were designed, and their electroanalytical performance was evaluated by using two different designs. The first is a 3-electrode configuration for off-chip detection, and the second is one for on-chip detection of the biomarkers dopamine and catechol at +0.70 V detection potential (vs. Ag/AgCl). The SFEs were fabricated by filtration of conducting carbon nanomaterials using a tailored template. In our perception, they pave the way for a wide field of opportunities in off-chip and microfluidic electrochemistry because of their reliability, ease of fabrication and remarkable performance that is based on the exclusive use of the carbon nanomaterial transducers.