摘要:
The present invention provides microfluidic devices and methods for using the same. In particular, microfluidic devices of the present invention are useful in conducting a variety of assays and high throughput screening. Microfluidic devices of the present invention include elastomeric components and comprise a main flow channel; a plurality of branch flow channels; a plurality of control channels; and a plurality of valves. Preferably, each of the valves comprises one of the control channels and an elastomeric segment that is deflectable into or retractable from the main or branch flow channel upon which the valve operates in response to an actuation force applied to the control channel.
摘要:
A microfluidic optoelectronic tweezers (OET) device can comprise dielectrophoresis (DEP) electrodes that can be activated and deactivated by controlling a beam of light directed onto photosensitive elements that are disposed in locations that are spaced apart from the DEP electrodes. The photosensitive elements can be photodiodes, which can switch the switch mechanisms that connect the DEP electrodes to a power electrode between an off state and an on state.
摘要:
A microfluidic valve structure (10 or 10') is provided. The valve structure (10) includes a valve body (15) having a fluid flow passage (22) formed therein for allowing fluid to flow therethrough. A valve boss (24) is configured to move relative to a valve seat (26) to open and close the fluid flow passage. A plurality of flexible support arms (30A-30D) extend between a wall (20) of the valve body (15) and the valve boss (24) for supporting the valve boss (24) relative to the valve body (15) such that the valve boss (24) engages and disengages the valve seat (26) to close and open the passage.
摘要:
The present invention provides microfluidic devices and methods for using the same. In particular, microfluidic devices of the present invention are useful in conducting a variety of assays and high throughput screening. Microfluidic devices of the present invention include elastomeric components and comprise a main flow channel; a plurality of branch flow channels; a plurality of control channels; and a plurality of valves. Preferably, each of the valves comprises one of the control channels and an elastomeric segment that is deflectable into or retractable from the main or branch flow channel upon which the valve operates in response to an actuation force applied to the control channel.
摘要:
A valve (50) includes a substrate defining an upstream channel (52) and a downstream channel (54) joined by a conduit defined by a first opposed wall (74) disposed at an angle to the central axis (60) of the upstream channel (52). At least a portion of a thermally responsive substance (56) obstructs the conduit by abutment with the first opposed wall (74). Upon actuation of a heat source (37), in thermal contact with the thermally responsive substance (56), an opening motion of the thermally responsive substance (56) opens the conduit.
摘要:
A method of fabricating an elastomeric structure, comprising: forming a first elastomeric layer on top of a first micromachined mold, the first micromachined mold having a first raised protrusion which forms a first recess extending along a bottom surface of the first elastomeric layer; forming a second elastomeric layer on top of a second micromachined mold, the second micromachined mold having a second raised protrusion which forms a second recess extending along a bottom surface of the second elastomeric layer, bonding the bottom surface of the second elastomeric layer onto a top surface of the first elastomeric layer such that a control channel forms in the second recess between the first and second elastomeric layers; and positioning the first elastomeric layer on top of a planar substrate such that a flow channel forms in the first recess between the first elastomeric layer and the planar substrate.