Patent ID: 8192701

Claim:
A valving system for liquid comprising: a channel defined by a channel wall; a first reservoir connected via the channel to a second reservoir, wherein the first reservoir includes a first liquid; a first insulating layer portion and a second insulating layer portion, each coupled to the interior surface of the channel wall of a portion of the channel; a photoconductive material coupled to the first insulating layer portion, wherein the first insulating layer portion and the second insulating layer portion coupled to the interior surface of the channel wall prevent the flow of liquid between the at least two reservoirs; and a power source in electrical communication with the photoconductive material, wherein the photoconductive material is activatable by directed light to provide an electrical potential difference across the first insulating layer portion and the second insulating layer portion, and wherein the electrical potential difference is operable for reducing the resistance of the first insulating layer portion and the second insulating layer portion to allow the first liquid to flow into the second reservoir.