Abstract:
An energy recovery device including: at least one capacitor with variable capacitance, the capacitor including a fixed electrode, a dielectric layer, and a liquid electrode; and a mechanism to inject an electric charge into the capacitor and to remove the electric charge therefrom, including a charge injection electrode forming a portion of the second face positioned upstream from the fixed electrode in the direction of displacement of the liquid electrode, and a charge removal electrode forming a portion of the second face positioned downstream from the fixed electrode in the direction of displacement of the liquid electrode.
Abstract:
A method for producing at least one deformable membrane micropump including a first substrate and a second substrate assembled together, the first substrate including at least one cavity and the second substrate including at least one deformable membrane arranged facing the cavity. In the method: the cavity is produced in the first substrate; then the first and second substrates are assembled together; then the deformable membrane is produced in the second substrate.
Abstract:
The invention relates to a micropump for which the pressure force is not limited by the electrowetting saturation angle, while being simple to manufacture. According to the invention, the microchannel (10) comprises an inlet orifice (11) and has a hydrophilic wall (12) extending from said inlet orifice (11). Displacement means are provided to displace a droplet (51) of liquid (L1) by electrowetting on a hydrophobic surface (22) until said droplet (51) is brought into contact with said hydrophilic wall (12), such that said droplet (51) enters into said microchannel (10) through said inlet orifice (11) by wetting, causing displacement of said fluid (F1).
Abstract:
The invention concerns a microfluidic liquid-movement device.The movement device according to the invention comprises a microchannel (10) provided with an opening (11B) onto the environment, the microchannel (10) being filled with a first liquid (F1) and a second liquid (F3), the two liquids being separated by a separating fluid (F2). Injection of the second liquid (F3) through the opening (11B) is obtained by movement of the first liquid (F1) by electrowetting.
Abstract:
The invention relates to a device for displacing a volume of liquid (1) under the action of an electrical voltage, comprising: iv) a first substrate with a first electrode (4,5); v) a second substrate with a second electrode (4, 5) facing the first substrate; vi) means for applying a first voltage (3) between the first and the second electrode, one of the two electrodes comprising, in essence, a matrix (5) consisting of a number of microelectrodes and having means for applying a second voltage between two microelectrodes. The invention also relates to a method for displacing a volume of liquid (1).
Abstract:
The invention concerns a method to analyse the liquid in a drop (2), comprising: contacting a drop of this liquid with a hydrophobic surface (8), displacing the drop on this surface by electrowetting, to bring it to a site (24, 26, 28) to measure electrical activity in which a conductive solution (42) is arranged, measuring said electrical activity.
Abstract:
This invention relates to a device for ejection of liquid drops comprising: a non-deformable body (28) provided with a cavity, filled with the said liquid (20) and at least one output orifice (19) for this liquid; means of transmitting a sufficiently large pulse to the liquid to cause ejection of at least one drop (26); these means include means (23) of striking a wall (30) of the said body (28).
Abstract:
A method for producing at least one deformable membrane micropump including a first substrate and a second substrate assembled together, the first substrate including at least one cavity and the second substrate including at least one deformable membrane arranged facing the cavity. In the method: the cavity is produced in the first substrate; then the first and second substrates are assembled together; then the deformable membrane is produced in the second substrate.
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.
Abstract:
An actuation device with several positions includes 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 the form of one or several 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.