Abstract:
In an aspect, the present invention uses projection micro stereolithography to generate three-dimensional microvessel networks that are capable of supporting and fostering growth of a cell population. For example, provided is a method of making a microvascularized bioreactor via layer-by-layer polymerization of a photocurable liquid composition with repeated patterns of illumination, wherein each layer corresponds to a layer of the desired microvessel network. The plurality of layers are assembled to make a microvascular network. Support structures having different etch rates than the structures that make up the network provides access to manufacturing arbitrary geometries that cannot be made by conventional methods. A cell population is introduced to the external wall of the network to obtain a microvascularized bioreactor. Provided are various methods and related bioreactors, wherein the network wall has a permeability to a biological material that varies within and along the network.
Abstract:
A method of bonding at least two substrates, each substrate having at least one surface that includes a layer of SU8, said method comprising soft baking at least a portion of the layer of SU8 of the first and second substrates, exposing at least the portion of the layer of SU8 of the first and second substrates to ultraviolet (UV) radiation to cross-link at least the portion of the layer of SU8 of the second substrate to a suitable degree, post exposure baking at least the portion of the layer of SU8 of the first substrate at a temperature greater than or equal to 20 degree Celsius (° C.) and less than or equal to 50 degree Celsius (° C.) to cross-link at least the portion of the layer of SU8 of the first substrate to a suitable degree. The method also includes compressing the portion of the cross-linked layer of SU8 of the first substrate against the portion of the cross-linked layer of SU8 of the second substrate at a suitable starting temperature (Ts) for a suitable time period (tcomp). In addition, the method also includes elevating the temperature during compression from Ts to a suitable elevated temperature (Te), thereby bonding the first and second substrates.
Abstract:
A method is disclosed for making a MEMS device wherein anhydrous HF exposed silicon nitride is used as a temporary adhesion layer allowing the transfer of a layer from a Carrier Wafer to a Device Wafer.
Abstract:
Provided is an apparatus. In one embodiment, this apparatus includes a substrate having a surface, and a plurality of nanostructures each having a first end and a second end, wherein the first end of each of the plurality of nanostructures is attached to the surface. At least a portion of the second ends of the plurality of nanostructures, in this embodiment, are bent toward one another to form two or more similarly configured clumps each including two or more nanostructures.
Abstract:
The present invention provides a method of fabricating a biosensor. The method includes providing a substrate which has a surface coating. The surface coating is deformable and the substrate includes a layered structure which has at least two electrically conductive layers separated by at least one electrically insulating layer. The method also includes imprinting a structure into the surface coating. Further, the method includes etching at least a region of the imprinted structure and the substrate to remove at least a portion of the structure and the substrate. The structure is shaped so that the etching forms at least a portion of the biosensor in the substrate and exposes at least a portion of each electrically conductive layer to form electrodes of the biosensor.
Abstract:
A MEMS vertical displacement device capable of moving one or more vertically displaceable platforms relative to a base. In particular, the vertical displacement device may be capable of moving a vertically displaceable platform so that the vertically displaceable platform remains generally parallel to a base. The vertically displaceable platform may be, but is not limited to, a microlens, a micromirror, micro-grating, or other device. The vertical displacement device may also be included in optical coherence and confocal imaging systems.
Abstract:
An electromechanical microstructure including a first mechanical part formed in a first electrically conductive material, and which includes a zone deformable in an elastic manner having a thickness value and an exposed surface, and a first organic film having a thickness, present on all of the exposed surface of the deformable zone. The thickness of the first film is such that the elastic response of the deformable zone equipped with the first film does not change by more than 5% compared to the response of the bare deformable zone, or the thickness of the first film is less than ten times the thickness of the deformable zone.
Abstract:
A micromechanical device includes a single crystal micromachined micromechanical structure. At least a portion of the micromechanical structure is capable of performing a mechanical motion. A piezoelectric epitaxial layer covers at least a part of said portion of the micromechanical structure that is capable of performing a mechanical motion. The micromechanical structure and piezoelectric epitaxial layer are composed of different materials. At least one electrically conducting layer is formed to cover at least part of the piezoelectric epitaxial layer.
Abstract:
A MEMS vertical displacement device capable of moving one or more vertically displaceable platforms relative to a base. In particular, the vertical displacement device may be capable of moving a vertically displaceable platform so that the vertically displaceable platform remains generally parallel to a base. The vertically displaceable platform may be, but is not limited to, a microlens, a micromirror, micro-grating, or other device. The vertical displacement device may also be included in optical coherence and confocal imaging systems.
Abstract:
A method for preparing a flexible electrode is provided. The method comprises sequentially forming a flexible base layer and an intermediate conductive layer on a carrier plate; treating an elastomeric template having an electrode pattern with an acid, followed by transferring and printing the electrode pattern onto the intermediate conductive layer to form an electrode inducing layer; forming a titanium dioxide-polydopamine composite layer in a gap of the electrode inducing layer; forming a platinum electrode layer on the titanium dioxide-polydopamine composite layer; removing the carrier plate. The invention solves the problems of slow formation of a polydopamine film and slow formation of a platinum electrode layer. A flexible electrode is further provided.