Patent ID: 7993825

Claim:
A method for detecting at least one parameter representative of molecular probes fixed to active zones of a sensor, wherein said sensor includes a network of field-effect transistors, each of which has a source region, a drain region, and a gate region which forms one of said active zones on which said representative parameter is detected, the method comprising the following steps: a) bringing some of said active zones into contact with molecular probes in order to fix said probes; b) bathing at least some of said active zones which have been brought into contact with said molecular probes, in an electrolyte solution; c) measuring at least one point of at least one of a drain current, source-gate voltage, and source-drain voltage characteristic of at least two of the field-effect transistors having at least two active zones that are part of said some of active zones, corresponding to a first group, so as to deduce therefrom said representative parameter by comparison between at least two measurements obtained for two different active zones immerged in said electrolyte solution; and fixing a potential of the electrolyte solution which covers said active zones with an electrode that applies a gate source voltage to the field effect transistors, the electrode being immerged in said electrolyte solution.