Freely Deformable Liquid Metal Grids as Stretchable and Transparent Electrodes

A new structure of stretchable and transparent metal-grid electrodes is described, where a liquid metal alloy, eutectic gallium-indium (EGaIn) is employed as a stretchable conducting material. By a “roll-painting and lift-off” technique based on photolithography, stretchable EGaIn-grids with the linewidth of 20 μm and the line pitch of 400-1000 μm are produced, providing the transmittance of 75%-8...