Patent ID: 7211223

Claim:
A device for injection and mixing of droplets of respective first and second liquid reagents, comprising: an analysis support including an electrically insulating layer; a viscous liquid deposited on the electrically insulating layer, wherein said viscous liquid is immiscible with said reagent droplets within said viscous liquid; a droplet of said first reagent deposited on said electrically insulating layer within the viscous liquid; an injector including said second liquid reagent and an outlet orifice, said injector forming a droplet of said second liquid reagent above the said droplet of first reagent; a first electrode arranged underneath said droplet of first reagent and said electrically insulating layer; a second electrode arranged near to the outlet orifice of the injector; and a controller for applying and controlling a voltage applied between said first and second electrodes, said voltage generating electrostatic forces which cause a formation of said droplets of respective first and second reagents, before said droplets come into contact and mix.