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Polycyclic aromatic hydrocarbon (PAH) based field effect transistor (FET) arrays show great promise in the field of sensors, detecting various chemical species. Nevertheless the discrimination abilities of the FET PAH sensors as an E-nose application have not been fully investigated. In present work we introduce silane modified PAH based sensors, capable of withstanding the confounding humidity conditions, we conduct an analysis of the various electrical features, characterizing field effect transistors, of 4 different PAH coated devices.Using appropriate statistical analysis we demonstrate the discrimination abilities of the array between polar, non-polar and aromatic chemicals and the advantages of using FET devices. The ability to study different electrical features may perhaps hold the key for better understanding the relationship between the sensor and the analyte and more importantly may bring us one step closer to creating a unique fingerprint to each analyte.

proceedings sensor 2013

D5.3 - Field Effect Transistors based on Polycyclic Aromatic Hydrocarbons for the Detection and Classification of Volatile Organic Compounds in a Background of Humidity