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(a) Sensing area and reference electrode opening of extended gate chip. (b) Schematic of functionalized high field modulated extended gate field effect transistor (FET) biosensor array. (c) Real image of high field modulated extended gate FET biosensor. (d) Pulse bias applied as gate voltage to the FET sensor. (e) Typical drain current versus time curve of FET biosensor measured in 1× PBS environment.
