Abstract:
A device comprising a channel comprising at least one surface wherein the surface comprises a fluid-impervious base surface covered by a coating beginning at a proximal location and ending at a distal location along the at least one surface of the channel, the coating forming a surface energy gradient from the proximal location to the distal location on the surface, wherein the coating comprises a species having a functional group M1 and a species having a functional group M2 where M1 and M2 have different surface energies, wherein the functional group M2 comprises an amide or amine group, and the concentration of the species comprising functional group M2 in the coating increases relative to the concentration of the species comprising functional group M1 from the proximal location to the distal location on the surface.
Abstract:
A medical device or analytical device comprising a fluid-impervious surface comprising a base surface, at least one distinct region of the base surface covered by a mixed monolayer film, the mixed monolayer film comprising a species having a functional group M1 and a species having a functional group M2 where M1 and M2 have different surface energies, the mixed monolayer forming a surface energy gradient wherein at least one of the species used to form the monolayer on the surface comprises a biopolymer-resistant domain.
Abstract:
A medical device or analytical device comprising a fluid-impervious surface comprising a base surface, at least one distinct region of the base surface covered by a mixed monolayer film, the mixed monolayer film comprising a species having a functional group Ml and a species having a functional group M2 where M1 and M2 have different surface energies, the mixed monolayer forming a surface energy gradient wherein at least one of the species used to form the monolayer on the surface comprises a biopolymer-resistant domain.
Abstract:
A cooling system comprising a plurality of coolant channels comprising a fluid-impervious surface comprising a base surface, at least one distinct region of the base surface covered by a mixed monolayer, the mixed monolayer comprising a species having a functional group M1 and a species having a functional group M2 where M1 and M2 have different surface energies, the mixed monolayer forming a surface energy gradient within the region and wherein any portions of the surface that border the at least one distinct region have substantially equal surface energies.
Abstract:
An analytical and/or diagnostic device that includes a compartment for reagents stored within the device and uses surface energy gradient coatings to move liquid through fluid passages. The device can include a sampler for collecting a sample, a reaction region for reagents to react with the sample, and a detection region to detect any species of interest present in the sample.
Abstract:
A microfluidic product utilizing gradient surface energy coatings for fluid control comprising a plurality of fluid passages wherein at least one fluid passage comprises a coating configured to control liquid flow wherein the coating configured to control liquid flow comprises a gradient surface energy coating from a proximal location to a distal location on a surface of the fluid passage. The product can include uniform regions and surface gradient regions in the same passage. Coating compositions and product dimensions can be selected to provide control over different flow properties including fluid velocity, reduction and acceleration of fluid flow, and starting and stopping fluid flow.
Abstract:
A medical device or analytical device comprising a fluid-impervious surface comprising a base surface, at least one distinct region of the base surface covered by a mixed monolayer film, the mixed monolayer film comprising a species having a functional group M1 and a species having a functional group M2 where M1 and M2 have different surface energies, the mixed monolayer forming a surface energy gradient wherein at least one of the species used to form the monolayer on the surface comprises a biopolymer-resistant domain.
Abstract:
A method of derivatizing a fluid-impervious surface with a mixed monolayer to create a surface energy gradient comprising the steps of a) Exposing a base surface to a first solution comprising a plurality of molecules of the formula X1-J1-M1 wherein X1 and M1 represent separate functional groups and J1 represents a spacer moiety that, together, are able to promote formation from solution of a self-assembled monolayer for sufficient time to form a monolayer surface having a substantially uniform surface energy on the base surface. b) Removing a portion of the monolayer formed in (a) such that a portion of the base surface is again fully or partially exposed. c) Exposing the portion of the base surface from (b) to a second solution comprising a plurality of molecules of the formula X2-J2-M2 wherein the functional group M2 has a different surface energy from that of the functional group M1 such that a surface energy gradient is formed.