Method of detecting cells

A method of detecting cells, comprising:

• a preparation step in which a sensor device is provided, wherein the sensor device comprises a base and at least one response electrode, and the response electrode is spaced apart from the base with respect to a gate end of the base;
• a first detection step in which a test solution containing a target cell is placed on the response electrode, and a first pulse voltage is applied to the response electrode to generate a first electric field between the response electrode and the gate end of the base, and a first detection current generated by the base is measured;
• and
• a second detection step in which a membrane potential of the target cell is changed, and a second pulse voltage is applied to the response electrode to generate a second electric field between the response electrode and the gate end of the base, and a second detection current generated by the base is measured,
• wherein a sign of the first detection current and a sign of the second detection current are opposite,
• wherein the first detection step comprises:
• measuring a first current gain generated by the base and measuring a second current gain generated by the base, wherein the first current gain is a current gain before the test solution is placed, the second current gain is a current gain after the test solution is placed, and the first detection current is the second current gain minus the first current gain.