A micro-wire electrode structure includes a substrate having a surface. A plurality of first micro-wire electrodes spatially separated by first electrode gaps is located in a first layer in relation to the surface, each first micro-wire electrode including a plurality of electrically connected first micro-wires. A plurality of electrically isolated second micro-wire electrodes is located in a second layer in relation to the surface, the second layer at least partially different from the first layer. Each second micro-wire electrode includes a plurality of electrically connected second micro-wires. A plurality of first gap micro-wires is located in each first electrode gap, at least some of the first gap micro-wires located in a gap layer different from the first layer. The first gap micro-wires are electrically isolated from the first micro-wires.