US 6,982,028 B2
Surface charge modification within preformed polymer microchannels with multiple applications including modulating electroosmotic flow and creating microarrays
Timothy J. Johnson, Gaithersburg, Md. (US); Emanuel A. Waddell, Jr., Gaithersburg, Md. (US); David J. Ross, Gaithersburg, Md. (US); and Laurie E. Locascio, North Potomac, Md. (US)
Assigned to The United States of America as represented by the Secretary of Commerce, Washington, D.C. (US)
Filed on Jul. 13, 2001, as Appl. No. 9/905,566.
Claims priority of provisional application 60/260577, filed on Jan. 09, 2001.
Prior Publication US 2002/0023840 A1, Feb. 28, 2002
Int. Cl. B01D 61/42 (2006.01); C02F 1/469 (2006.01)
U.S. Cl. 204—454 25 Claims
 
1. A method of modifying fluid flow in a channel formed in a substrate which comprises: exposing only one or more discrete, isolated portions of the channel to light at a fluence which is sufficient to change a surface charge at the one or more discrete, isolated exposed portions of the channel.