Abstract:
A microfluidic device, including a microfluidic network, including: a) two parallel plates each including one or more electrodes, b) at least one channel, arranged between the two plates, made from a material obtained by solidification or hardening of a material of a first fluid, and c) a mechanism varying a physical parameter of the material constituting walls of the channel so as to cause the material to pass at least from the liquid state to the solid state.
Abstract:
A device for addressing an electrode array of 2n lines of an electro-fluidic device, each line having N electrodes (n≦N). The device includes, on each line, n selection electrodes, all of the line selection electrodes being connected to 2n line selection conductors, 2n−1 line selection electrodes of 2n−1 lines being connected to each line selection conductor, and selection devices for selecting one or more line selection conductors.
Abstract:
The recess (12) between the main connecting part (8) and a collar (9) contains a toroidal or otherwise shaped sealing ring or joint (3) and the end of a tube (1) incorporating an outer flange (2), whose thickness becomes zero at the crushing bulge (4) of the sealing ring (3). An excellent seal is ensured at this location, even for pressurized fluids, and the assembly can easily be dismantled.
Abstract:
An actuation device with plural positions and including a support, at least one flexible membrane attached to the support forming at least one closed containment with the support with volume filled with at least one first liquid in a form of one or plural drops, and at least a second liquid, the first liquid and the second liquid being immiscible, and an electrical device to modulate the profile of the membrane by controlling the shape of at least one of the drops.
Abstract:
A liquid dispensing device includes first and second substrates, with the first substrate including an opening for introduction of a fluid, and the second substrate including a multiplicity of electrodes. The device includes a transfer electrode, located at least partially opposite to the opening, at least two drop-forming electrodes, and a reservoir electrode, located between the transfer electrode and the drop-forming electrodes, and with an area that is at least equal to three times the area of each drop-forming electrode.
Abstract:
The device enables a second drop to be mixed in a first drop deposited on an electrically insulating layer of an analysis support, in a viscous liquid environment and to mix the resulting drop. The device comprises at least one injector forming the second drop above the first drop. After formation of the second drop, a voltage impulse is applied between a first electrode, arranged under the electrically insulating layer of the analysis support, underneath the first drop, and a second electrode arranged near the outlet orifice of the injector. The voltage impulse fosters the coalescence phenomenon between the two drops, while preventing risks of contamination of the injector by the reagent of the first drop.
Abstract:
Devices and methods for carrying out a chemical or biochemical protocol are disclosed. In one embodiment, the chemical or biochemical protocol is performed by cycling at least one thermal transfer member between at least two temperatures while liquid samples on which the chemical or biochemical protocol is to be performed are continuously moving through at least one temperature regulated zone upon which the at least one thermal transfer member acts. In some embodiments, the device comprises a sample transport member that comprises liquid samples in sample receiving regions. The sample transport member moves the samples continuously through a temperature regulated zone which cycles between at least two temperatures while the liquid samples are moving through a temperature regulated zone on which at least one thermal transfer member acts. In some embodiments, the sample receiving regions comprise wells, hydrophillic films or hydrophillic filaments.
Abstract:
A flowmeter includes a first chamber and a second chamber connected through a channel. The first chamber is provided with a first deformable membrane and with first and second gauges. The second chamber is provided with a second deformable membrane and with third and fourth gauges. The four gauges form a Wheatstone bridge.
Abstract:
A hydrophobic surface coating, preferably obtained by chemical vapor deposition, comprises at least an upper thin layer formed by a compound selected from the group consisting of SiCxOy:H with x comprised between 1.4 and 2 and y comprised between 0.8 and 1.4 and SiCx′Ny′:H with x′ comprised between 1.2 and 1.4 and y′ comprised between 0.6 and 0.8, so as to obtain a free surface with a low wetting hysteresis. Such a hydrophobic surface coating can be arranged on the free surface of a microcomponent comprising at least one substrate provided with, an electrode array and particularly suitable for moving drops of liquid by electrowetting on dielectric.
Abstract translation:优选通过化学气相沉积获得的疏水性表面涂层至少包含由选自由SiC x O y:H组成的组中的化合物形成的上部薄层,x包含在1.4和2之间,y包含在0.8和1.4之间,而SiC x N ':H,x'在1.2和1.4之间,y'在0.6和0.8之间,以获得具有低润湿滞后的自由表面。 这样的疏水表面涂层可以布置在微组件的自由表面上,该微组件包括至少一个设置有电极阵列的基底,并且特别适用于通过电介质上的电润湿来移动液滴。
Abstract:
A device for forming at least one circulating flow, or vortex, at the surface of a drop of liquid, including at least two first electrodes forming a plane and having edges facing each other, such that the contact line of a drop, deposited on the device and fixed relatively to the device, has a tangent forming, when projected onto the plane of the electrodes, an angle between 0° and 90° with the edges facing each other of the electrodes.