Abstract:
The present disclosure relates to fluidic systems and devices for processing, extracting, or purifying one or more analytes. These systems and devices can be used for processing samples and extracting nucleic acids, for example by isotachophoresis. In particular, the systems and related methods can allow for extraction of nucleic acids, including non-crosslinked nucleic acids, from samples such as tissue or cells. The systems and devices can also be used for multiplex parallel sample processing.
Abstract:
A static expansion method is performed by expanding a volume of a testing gas from V0 to V0+V1 between a second chamber of the volume V1 which is connected to an upstream side of a measurement chamber and a first chamber of the volume V0 which is connected to an upstream side of the second chamber, wherein the first camber is in communication with the second chamber via a first valve, wherein the second chamber is in communication with the measurement chamber via each of a second valve and an orifice or porous plug, respectively. When the first valve is opened and the second valve is closed, the testing gas flows from the first chamber via the second chamber into the measurement chamber only through the orifice or porous plug.
Abstract:
We describe a method of layer-by-layer deposition of a plurality of layers of material onto the wall or walls of a channel of a microfluidic device, the method comprising: loading a tube with a series of segments of solution, a said segment of solution bearing a material to be deposited; coupling said tube to said microfluidic device; and injecting said segments of solution into said microfluidic device such that said segments of solution pass, in turn, through said channel depositing successive layers of material to perform said layer-by-layer deposition onto said wall or walls of said channel. Embodiments of the methods are particularly useful for automated surface modification of plastic, for example PDMS (Poly(dimethylsiloxane)), microchannels. We also describe methods and apparatus for forming double-emulsions.
Abstract:
The invention is directed to a patterned aerogel-based layer that serves as a mold for at least part of a microelectromechanical feature. The density of an aerogel is less than that of typical materials used in MEMS fabrication, such as poly-silicon, silicon oxide, single-crystal silicon, metals, metal alloys, and the like. Therefore, one may form structural features in an aerogel-based layer at rates significantly higher than the rates at which structural features can be formed in denser materials. The invention further includes a method of patterning an aerogel-based layer to produce such an aerogel-based mold. The invention further includes a method of fabricating a microelectromechanical feature using an aerogel-based mold. This method includes depositing a dense material layer directly onto the outline of at least part of a microelectromechanical feature that has been formed in the aerogel-based layer.
Abstract:
The invention is directed to a patterned aerogel-based layer that serves as a mold for at least part of a microelectromechanical feature. The density of an aerogel is less than that of typical materials used in MEMS fabrication, such as poly-silicon, silicon oxide, single-crystal silicon, metals, metal alloys, and the like. Therefore, one may form structural features in an aerogel-based layer at rates significantly higher than the rates at which structural features can be formed in denser materials. The invention further includes a method of patterning an aerogel-based layer to produce such an aerogel-based mold. The invention further includes a method of fabricating a microelectromechanical feature using an aerogel-based mold. This method includes depositing a dense material layer directly onto the outline of at least part of a microelectromechanical feature that has been formed in the aerogel-based layer.
Abstract:
PURPOSE: An electro-osmosis pump using a reversible electrode reaction and a fluid pumping system using the same are provided to transfer a large amount of fluid for a long time while the size and a configuration of the electro-osmosis pump are intactly maintained. CONSTITUTION: An electro-osmosis pump (10) using a reversible electrode reaction includes a transfer line, a first check valve, a second check valve, a pumping line, and a separator. The transfer line provides a passage for transferring a target fluid (16) from a container to the outside. The first and second check valves are installed to be spaced from the transfer line respectively and prevent the target fluid flowing to a reverse direction of a transferring direction. The pumping line is connected to a part of the transferring line between the first and second check valves. The electro-osmosis pump provides a pumping force to the pumping line. The separator separates the electro-osmosis pump from the target fluid and transmits the pumping force to the target fluid. [Reference numerals] (14) Power providing unit
Abstract:
Provided is a fabrication method for fine structures with variable micropatterns including: a step of forming a mixture containing photochromic materials and curable materials; a step of providing the mixture for a microfluidic tube; a step of forming variable micropatterns by applying patterned energy to a desired spot of the mixture and hardening the mixture; and a step of forming fine structures by injecting curable materials and applying additional energy to the microfluidic tube. [Reference numerals] (AA) Start; (BB) End; (S1) Forming a mixture containing photochromic materials and curable materials; (S2) Providing the mixture for a microfluidic tube; (S3) Forming variable micropatterns by applying patterned energy to a desired spot of the mixture and hardening the mixture; (S4) Forming fine structures by injecting curable materials and applying additional energy to the microfluidic tube
Abstract:
An aerogel-based mold for MEMS fabrication and formation is provided to reduce time to manufacture a micro electric machine characteristic part by reducing time to form a patterned material layer. An aerogel-based mold for MEMS fabrication and formation comprises an aerogel layer(11). The aerogel layer approximately has the thickness of 10 nm ~ 1 mm. The aerogel layer has a structural characteristic part having the same surface contour with a partial surface contour of a micro electric machine characteristic part and is evaporated on a substrate.
Abstract:
PURPOSE: A micro channel generating a helical flow using electroosmosis and a method for manufacturing the same are provided to generate three-dimensional helical flow of an electrolyte. CONSTITUTION: A micro channel(100) having surface potential includes helical surface potential patterns composed of a plurality of first potential patterns(102) arranged on the upper wall surface inside the micro channel at regular gaps; a plurality of second surface potential patterns(104) arranged on the lower wall surface inside the micro channel at regular gaps to be connected to both ends of the first surface potential pattern; and a plurality of third potential patterns(108) arranged on the side wall surface inside the micro channel connecting the first surface potential patterns with the second surface potential patterns.