Patent ID: 9696304
Date: 2017-07-04
CPC Classifications: G01N

Claim:
1. A method for detecting a biomarker in a sample, comprising: functionalizing an electrode array by coating the electrode array with a coating material, the electrode array comprising a plurality of electrodes; applying the sample onto the electrode array; controlling, using a controller, an impedance read-out circuit to measure an initial value of an impedance of the electrode array when the sample is initially applied; controlling, using a controller, a signal generator coupled to the electrode array to generate an electrical signal and apply the electrical signal to the electrode array after the initial value of the impedance is measured, the electrical signal having a fixed magnitude and a fixed frequency; controlling, using the controller, the impedance read-out circuit to measure the impedance versus time of the electrode array for a predetermined period of time after the initial value of the impedance is measured; and calculating a change in the impedance versus time of the electrode array with respect to the initial value of the impedance.