Electrochemical Sensor for Carbon Monoxide Testing Based on Carbon Nanofiber - Conductive Polymer Electrodes

The printed electrochemical sensors fabrication technology involves metal electrodes and carbon electrodes printed on a thin layer over a hard or flexible substrat, which is obtained using screen printing technology. The obtained structures have a good resistance to mechanical abrasion, making screen printed sensors to be a low-cost mass production whide used technology for the development of electrochemical sensors. In this way, screen printed electrodes prepared with dedicated inks are obtained, in the form of films with a thickness of approx. $0.1-0.2 \mathrm{~mm}$, of different sizes and shapes. Screen printing pastes hereby also referred as inks, have specific rheological properties with a viscosity between 250-300 cps depending on masks propriety and the printed electrodes specifications. The inks recipies use different organic solvents and an appropriate functional components that include conductive material (Ag, carbon, Cu, Au nanoparticle) active components as graphen, conductive polymers, special functionalised nanoparticle, ceramic nanotubs etc depending by the sensor final destination. In this work is presented the method used in laboratory to functionalise a home made screen printed sensor for carbon monoxide detection.