Development of an extremely selective e-nose employing a single polycyclic aromatic hydrocarbon-based chemFET

In this study, we introduce a novel synthetically designed polycyclic aromatic hydrocarbon (PAH) chemFET. The chemFET device operates by employing voltage dependent back-gate measurements, wherein the drain current (I_d) is monitored while the gate voltage (V_g) applied to the device is swept backward and forward between -40V and +40V. Using this device, we demonstrate that an extremely selective e-nose can be developed by extracting the most suitable features from the I_d-V_g characteristic curves of a single chemFET. The accuracy of the identification of eight different volatile organic compounds (VOCs) surpassed 91%.