Importance

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Abstract

Disclosed is an olfaction system based on integration of gas sensitive conducting polymers and Floating Gate Metal Oxide Semiconductor (FGMOS) sensors. A sensing polymer, polypyrrole for example, is electrochemically deposited onto sensor pads which are electrically connected to floating gate of the sensor. The response of these sensing polymers to any vapour analyte can be tailored using several techniques that include the use of different dopants, changing electrolyte concentrations or varying growth potential at the time of electrodeposition. Using an array of floating gate sensors, coupled to these chemically diverse polymers, this system will facilitate a signature-like response from the sensors in the array. Every sensor can be accessed and analysed individually using a specially designed addressing circuit. The response from the sensors is amplified through a trans-impedance amplifier and converted to 8-bit digital data for ease of analyte identification and quantification.

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First Claim