Methods and apparatus for manipulating droplets by...

G - Physics – 01 – N

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G01N 27/403 (2006.01)

Patent

CA 2500252

An apparatus is provided for manipulating droplets. The apparatus is a single- sided electrode design in which all conductive elements are contained on one surface on which droplets are manipulated. An additional surface can be provided parallel with the first surface for the purpose of containing the droplets to be manipulated. Droplets are manipulated by performing electrowetting-based techniques in which electrodes contained on or embedded in the first surface are sequentially energized and de-energized in a controlled manner. The apparatus enables a number of droplet manipulation processes, including merging and mixing two droplets together, splitting a droplet into two or more droplets, sampling a continuous liquid flow by forming from the flow individually controllable droplets, and iterative binary or digital mixing of droplets to obtain a desired mixing ratio.

L'invention concerne un appareil de manipulation de gouttelettes. Cet appareil est conçu avec une électrode à une seule face dans laquelle tous les éléments conducteurs se trouvent sur la face sur laquelle les gouttelettes sont manipulées. Il est possible de disposer d'une surface supplémentaire, parallèle à la première surface, dans le but de contenir les gouttelettes à manipuler. Les gouttelettes sont manipulées grâce à des techniques à base d'électromouillage dans lesquelles les électrodes contenues ou intégrées dans la première surface sont activées et désactivées séquentiellement par commande. L'appareil permet une certain nombre de processus de manipulations de gouttelettes, y compris la fusion et le mélange de deux gouttelettes ensemble, la division d'une gouttelette en deux ou plusieurs gouttelettes, l'échantillonnage d'un écoulement continu de liquide par formation, à partir de l'écoulement, de gouttelettes que l'on peut commander individuellement, et un mélange binaire itératif ou numérique de gouttelettes afin d'obtenir un rapport de mélange recherché.

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