Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

We demonstrate a cost-effective but fast multiparameter data acquisition system for odour sensors based on low threshold organic field effect transistors (OFETs) with an amorphous methoxy-derivative of poly(triaryl amine) (PTA-OMe) as semiconductor. The system applies a simple algorithm to measure OFET saturated transfer characteristics with a tailored operational amplifier circuit that is interfaced to a laptop that controls the circuit and analyses data with bespoke software. Despite the semiconductor's low charge carrier mobility μ ∼ 5 × 10-5Vs/cm2, the system returns multiparameter OFET data: OFET source-drain current ISDin both the 'on' and 'off' state, carrier mobility μ, and threshold (VT), in real time (resolution <1 s). The system is tested by exposing the OFET to a series of alcohol odours at different concentrations. Sensor response is quick, and follows a distinct trend IPA > PrOH > EtOH > MeOH. Crown Copyright © 2009.

Original publication

DOI

10.1016/j.snb.2009.01.006

Type

Journal article

Journal

Sensors and Actuators, B: Chemical

Publication Date

02/04/2009

Volume

137

Pages

586 - 591