Abstract:
A microfluidic method and device for focusing and/or forming discontinuous sections of similar or dissimilar size in a fluid is provided. The device can be fabricated simply from readily-available, inexpensive material using simple techniques.
Abstract:
The present invention is directed to self-assembly of structures, and, in particular, to self-assembly by action of a liquid patterned onto a substrate. In one embodiment, the present invention is directed to method of self-assembling a plurality of structures. The method includes patterning a first liquid onto a first substrate, and, while at least a portion of the first liquid remains in liquid form, self-assembling at least a portion of the plurality of structures onto the substrate by action of the first liquid and according to the pattern of the first liquid. In another embodiment, the present invention is directed to a display. The display includes a first substrate and a first plurality of electrical connectors being in electrical connection with one another. The display further includes a second substrate, at least some of the second plurality of electrical connectors being in electrical connection with one another. The display further includes a plurality of display elements each electrically connected to at least one of the first plurality of electrical connectors and the second plurality of connectors. In this embodiment, each of the plurality of display elements has an average diameter of less than 1 millimeter.
Abstract:
A mixing apparatus is used to effect mixing between one or more fluid streams. The mixing apparatus generally functions by creating a transverse flow component in the fluid flowing within a channel without the use of moving mixing elements. The transverse or helical flow component of the flowing fluid or fluids can be created by weak modulations of the shape of the walls of the channel. Transverse or helical flow component can be created by grooves features defined on the channel wall. Specifically, the present invention can be used in laminarly flowing fluids. The mixing apparatus and methods thereof can effect mixing of a fluid or fluids flowing with a Reynolds number of less than about 100. Thus, the present invention can be used to mix a fluid flowing in the micro-regime. The mixing apparatus can be used to mix a fluid in a microfluidic system to significantly reduce the Taylor dispersion along the principal direction. The mixing apparatus can be used to increase the effective exposed area to promote diffusion of components between or within the fluid or fluids.
Abstract:
A method and apparatus for providing electric microcontact printing is provided. A stamp is brought into contact with the surface of a substrate to provide high resolution features. Aspects of the invention may be used for data storage, microcontact printing, and for other applications requiring high resolution pattern transfer.
Abstract:
The present invention describes improved microfluidic systems and procedures for fabricating improved microfluidic systems, which contain one or more levels of microfluidic channels. The methods for fabrication the systems disclosed can provide a convenient route to topologically complex and improved microfluidic systems. The microfluidic systems can include three-dimensionally arrayed networks of fluid flow paths therein including channels that cross over or under other channels of the network without physical intersection at the points of cross over. The microfluidic networks can be fabricated via replica molding processes utilizing mold masters including surfaces having topological features formed by photolithography. The present invention also involves microfluidic systems and methods for fabricating complex patterns of materials, such as biological materials and cells, on surfaces utilizing the microfluidic systems. Specifically, the invention provides microfluidic surface patterning systems and methods for fabricating complex, discontinuous patterns on surfaces that can incorporate or deposit multiple materials onto the surfaces. The present invention also provides improved microfluidic stamps or applicators for microcontact surface patterning, which are able to pattern onto a surface arbitrary two-dimensional patterns, and which are able to pattern multiple substances onto a surface without the need for multiple steps of registration or stamping during patterning and without the need to selectively "ink" different regions of the stamp with different materials.
Abstract:
A material is selectively deposited on substrate having a contoured surface including protrusions and recesses. A first fluid is applied to the surface to contact the protrusions and not the recesses, and a first material is deposited on the substrate where the substrate is in contact with the fluid. A second fluid may be applied to contact the recesses, and a second material is deposited on the substrate where the substrate is in contact with the fluid. A third fluid may be applied, and a third material having affinity for one of the first and second materials is deposited only where one of the first and second materials is deposited. The first and second material may be a protein, and the first, second and third materials may respectively be cytophobic, cytophilic and a cell. The substrate may be formed of a polymer such as polydimethylsiloxane. A cell containment device is provided containing the substrate with a cytophobic material connected to the protrusions and a cytophilic material connected to the recesses.
Abstract:
The present invention describes improved microfluidic systems and procedures for fabricating improved microfluidic systems, which contain one or more levels of microfluidic channels. The methods for fabrication the systems disclosed can provide a convenient route to topologically complex and improved microfluidic systems. The microfluidic systems can include three-dimensionally arrayed networks of fluid flow paths therein including channels that cross over or under other channels of the network without physical intersection at the points of cross over. The microfluidic networks can be fabricated via replica molding processes utilizing mold masters including surfaces having topological features formed by photolithography. The present invention also involves microfluidic systems and methods for fabricating complex patterns of materials, such as biological materials and cells, on surfaces utilizing the microfluidic systems. Specifically, the invention provides microfluidic surface patterning systems and methods for fabricating complex, discontinuous patterns on surfaces that can incorporate or deposit multiple materials onto the surfaces. The present invention also provides improved microfluidic stamps or applicators for microcontact surface patterning, which are able to pattern onto a surface arbitrary two-dimensional patterns, and which are able to pattern multiple substances onto a surface without the need for multiple steps of registration or stamping during patterning and without the need to selectively "ink" different regions of the stamp with different materials.
Abstract:
An elastomeric mask is provided that allows deposition of a variety of materials through mask openings. The mask seals effectively against substrate surfaces, allowing simple deposition from fluid phase, gas phase, and the like or removal of material using gaseous or liquid etchants. The mask then can be simply peeled from the surface of the substrate leaving the patterned material behind. Multi-layered mask techniques are described in which openings in an upper mask allow selected openings of a lower mask to remain unshielded, while other openings of the lower mask are shielded. A first deposition step, followed by re-orientation of the upper mask to expose a different set of lower mask openings, allows selective deposition of different materials in different openings of the lower mask. Pixelated organic electroluminescent devices are provided via the described technique.
Abstract:
The present invention provides structure-based combinatorial libraries of compounds containing the functional group minima of picornaviruses including poliovirus and rhinovirus. The libraries can be used to screen for therapeutical antiviral compounds, e.g., anti-picornaviral capsid-binding compounds.