Fused deposition modeling (FDM) based 3D printing of microelectrodes and multi-electrode probes

Electrode fabrication is one of the basic practices for electrochemists. Especially, microelectrodes are generally known as “hand-made” and their often like an art. In this work, we report a new protocol fabricating multi-electrode probes based on recently matured 3D Fused Deposition Modeling (FDM) printing technique. The general concept to print half insulating body in PETG, insert (etched) metal or carbon wire(s) channel(s), resume complete whole electrode. printed electrodes then sealed by heating mechanically polished before use. process requires only low-cost non-specialized facilities that can be easily equipped even teaching laboratories. Single Pt, C, Au, Ag, W Cu with diameter below 5 µm fabricated examined cyclic voltammetry scanning electron microscopy. Furthermore, probe consisting W, Cu, Ag (oxidized Ag/AgCl) Pt also demonstrated pH (potentiometric) H2O2 (amperometric) sensing applications.