A micro-channel electrode structure includes a layer and an electrode micro-channel formed in the layer, the electrode micro-channel having an electrode micro-channel bottom forming the bottom of the electrode micro-channel and an electrode micro-channel top forming the top the electrode micro-channel. The electrode micro-channel is at least partially filled with an electrode that extends along the electrode micro-channel and extends from the electrode micro-channel bottom toward the electrode micro-channel top. A fluid micro-channel adapted to carry a fluid is formed in the layer. An electrical power source is connected to the electrode. The fluid micro-channel intersects the electrode micro-channel in the layer to form a micro-channel intersection and the electrode extends from the electrode micro-channel into the micro-channel intersection without occluding the fluid micro-channel.