Patent ID: 6387329
Filing Date: 2002-05-14
Classification: G01N

Abstract:
A method of determining the diffusion coefficient of an analyte, comprising:contacting a sensor with the analyte, the sensor comprising, regions of a first conductive material and a second material compositionally different than the first material, wherein the sensor provides an electrical path through the regions of the first material and the regions of the second material, and wherein the sensor comprises at least one region of second material having a different thickness than at least one other region of second material, the second material being selected from the group consisting of a conductive organic material, a semi-conductive material and a non-conductive material; the sensors constructed to provide a first response when contacted with a first chemical analyte, and a second different response when contacted with a second different chemical analyte; and measuring a change in the sensor's response to the analyte over time, correlating said response to the value of the diffusion coefficient of the analyte.