MWCNT-COOH/PDMS based dry ECG electrodes for ambulatory ECG recordings

Highly conductive electrodes were fabricated using carboxylic functionalized Multiwalled Carbon Nanotubes (MWCNT-COOH), and Polydimethylsiloxane (PDMS) for continuous and long-term ECG monitoring. A two-step dispersion method was followed: first using magnetic stirring, and the second using ultrasonication. Thirteen electrodes with different concentrations of CNTs were fabricated using molds. The percolation threshold was observed at 4.5 wt%. These electrodes were subject to real-time and remote monitoring achieved by an Internetof-Things (IoT) system.