Sensor device, procedure and sensor for determining the relative concentration of a first type of ion in relation to a second type of ion dissolved in a liquid drop

摘要

A sensor device (100) comprising: a semiconductor substrate (110) comprising a plurality of channels (120), the channels (120) connecting a cavity (140) and a measuring electrode (150); anda counter electrode (160) arranged to be in contact with the cavity (140), wherein the cavity (140), the measuring electrode (150) and the counter electrode (160) are arranged to receive a drop of liquid and enable the application of a voltage to the liquid drop, wherein the semiconductor substrate (110) comprises an electrically conductive region, which is isolated from the channels (120), wherein the electrically conductive region is configured such that a control potential is applied to the liquid drop, when this liquid is in the cavity (140), the electrically conductive region being formed by a doped region.