Transparent elastic capacitive pressure sensors based on silver nanowire electrodes

Stretchable conductive films were produced by embedding silver nanowires onto the surface of biocompatible polydimethylsiloxane (PDMS) elastomeric membranes with low cost solution based processes. The films showed low sheet resistance (<12 Omega/square) and good transparency (40% at 550nm). By laminating two films together, transparent elastic capacitive pressure sensors were made, which present higher sensitivity to that using Al foil as the electrode. A higher concentration of silver nanowire solution was also shown to be able to improve the sensitivity.