Abstract:
Disclosed fire methods of manufacturing a SH surface including: creating a master with SH features by: depositing a rigid material onto a first surface, wherein the first surface is a shrinkable platform; shrinking the first surface by heating to create a SH surface, wherein the SH surface has micro- and nano-scale structural features that trap air pockets and prevent water from wetting the surface; forming the master by molding an epoxy with the shrunken first surface having a SH surface, wherein the master acquires the SH features of the first surface; and imprinting the SH features of the master onto a second surface to impart the SH features of the master onto the second surface. Some embodiments relate to a superhydrophobic (SH) surface, an article including a SH surface as disclosed, such as a microfluidic device or a food container.
Abstract:
The present invention is a method that (i) allows for creating micro and/or nanostructures on either planar or non-planar three-dimensional surfaces in a single molding step, and (ii) allows for the molded production of complex high-aspect ratio micro and/or nanostructures including but not limited to cylinders, conical structures, low aspect-ratio channels, bumps, or posts. An example of such a complex structure are high aspect ratio pillars with enlarged "mushroom-shaped" or undercut tips which demonstrate enhanced, repeatable adhesion and shear strength on a variety of substrates when compared with other micro and/or nanostructures and unstructured materials. The mold of such a material requires an "undercut" feature that cannot be produced using typical micro/nano-molding processing techniques.
Abstract:
Imprint lithography methods that incorporate depositing droplets of polymerizable material in patterns that improve fill time performance when employing directionally-oriented imprint templates. The patterns are based on grid arrays formed of repeating sets of rows of droplets oriented along fast and slow axes, with droplets of each row offset along the slow axis relative to droplets in adjacent rows.
Abstract:
A mold having a fluoropolymer wherein the mold defines cavities having a shape and a cross-sectional dimension less than 100 micrometers, a roller, a surface in cooperation with the roller to form a nip point to receive the mold, wherein the nip point receives a liquid and accelerates entry of the liquid into the cavity Forming particles includes applying a liquid to a mold, wherein the mold comprises a fluoropolymer and defines a cavities each having a broadest crosssectional dimension of less than 100 micrometers, nipping the mold between a roller and a surface such that the liquid enters the cavities of the mold, and hardening the liquid in the cavities of the mold to form a particle within each cavity, wherein the particle has a size and shape that mimics the size and shape of th cavity of the mold
Abstract:
A method of making a nanofluidic device is carried out by providing a thermoplastic substrate having a top surface portion, the top surface portion having at least one nanofluidic feature formed therein; providing a thermoplastic cover having a bottom surface portion, the thermoplastic cover having a glass transition temperature less than that of the substrate; optionally activating one or both of the thermoplastic substrate top surface portion and the thermoplastic cover bottom surface portion; and then thermally bonding the thermoplastic cover top surface portion to the thermoplastic cover bottom surface portion to produce the nanofluidic device.
Abstract:
The present invention are methods for fabrication of micro- and/ or nano-scale adhesive fibers and their use for movement and manipulation of objects.
Abstract:
The subject matter described herein relates to methods and systems for fast imprinting of nanometer scale features in a workpiece. According to one aspect, a system for producing nanometer scale features in a workpiece is disclosed. The system includes a die having a surface with at least one nanometer scale feature located thereon. A first actuator moves the die with respect to the workpiece such that the at least one nanometer scale feature impacts the workpiece and imprints a corresponding at least one nanometer scale feature in the workpiece.
Abstract:
A polydioxanone film comprising substantially cylindrical polydioxanone pillars on at least one side thereof, said pillars having diameters from about 0.2 µm to about 3 µm, and heights from about 2 µm to about 20 µm from the surface of the film, a process for adsorbing proteins using the film and medical devices incorporating the film.
Abstract:
An implant having an adhesive structure comprising a planar surface having two sides and rectangular cuboid-based protrusions having pyramidal tips extending from at least one of said sides, optionally having a porous basic supporting structure, and methods of making and using such implants.