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Published August 1, 2005 | public
Journal Article Open

Polydimethylsiloxane based microfluidic diode


In this paper, we present a novel elastomer-based microfluidic device for rectifying flow. The device is analogous to an electronic diode in function since it allows flow in one direction and stops flow in the opposing direction. The device is planar, in-line and can be replica molded via standard soft lithography techniques. The fabrication process is outlined in detail and follows a simple procedure that requires only photolithography and one replica molding step. Several geometries of devices are presented along with their flow versus pressure characteristics. A brief discussion of the device behavior is presented along with possible uses for the device.

Additional Information

© 2005 IOP Publishing Ltd. Received 18 March 2005, in final form 18 May 2005. Published 14 June 2005. Print publication: Issue 8 (August 2005).


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