Core–shell silver/silver chloride nanoparticles on carbon nanofibre arrays for bio-potential monitoring

We report a novel electrode material for the detection of human bio-potentials using carbon nanofibre (CNF) arrays functionalized with silver/silver chloride (Ag–AgCl) core–shell nanoparticles. The CNFs are protected against detachment using a thin polymer film, which firmly secures the fibres to the substrate surface. The core–shell Ag–AgCl nanoparticles on the CNF surfaces clearly enhance transduction in ionic media as shown by cyclic voltammetry and impedance spectroscopy. We infer that these functionalized CNF arrays can be utilized as dry electrophysiological sensors for bio-potential monitoring applications.