ORGANIC FIELD EFFECT TRANSISTOR (OFET) FOR THE DETECTION OF GRAM NEGATIVE/POSITIVE BACTERIA, METHOD OF DETECTION AND FABRICATION OF THE TRANSISTOR

摘要

The present invention discloses an ultra-low voltage operated OFET based bio-sensing system for the detection of biological species5 including Gram positive bacteria and/or Gram negative bacteria comprising an OFET device having a base substrate, a gate electrode deposited on said base substrate, layered hybrid dielectrics deposited on said gate electrode having top and bottom dielectric layer of low dielectric constant (k) based dielectric materials and intermediate dielectric layer of high dielectric constant (k)10 based dielectric material, n-type organic semiconducting layer based active channel deposited on top of said layered hybrid dielectrics, a source electrode and a drain electrode deposited on the top side said n-type organic semiconducting layer; and adsorbing layer grown on the n-type semiconducting layer between the source electrode and the drain electrode to15 adsorbed the Gram positive and/or Gram negative bacteria to be detected over the active channel ensuring the adsorbed bacteria in said adsorbing layer stays above, and in direct contact with n-type organic semiconducting active channel.