Patent ID: 8202496

Claim:
A separation device comprising: a substrate; an impermeable layer located on the substrate; a first circulation channel arranged in the substrate with an input and an output, the impermeable layer forming a wall of the first circulation channel; a second circulation channel having at least an output, and is separated from the first circulation channel and the substrate by the impermeable layer; a third circulation channel, different from the second circulation channel, having at least an output, and is separated from the first circulation channel and the substrate by the impermeable layer; a first nanotube with a first internal channel connecting the first circulation channel to the second circulation channel through the impermeable layer, the first nanotube having a first effective diameter; and a second nanotube with a second internal channel connecting the first circulation channel to the third circulation channel through the impermeable layer, the second nanotube having a second effective diameter that is larger than the first effective diameter.