Figure 3
From: A Disposable paper breathalyzer with an alcohol sensing organic electrochemical transistor
Alcohol detection in breath.
(A) Step change in Id when breathing 0%, 0.01%, 0.06%, 0.2% ethanol vapor on to the OECT, with Vg = 0.5 V, Vd = −0.7 V. Breath alcohol concentration is tested 30 minutes after drinking one glass of wine (0.01%) and two glasses of wine (0.06%). 0.2% breath ethanol vapor is from mouthwash, which contains 21.6% alcohol. The BAC is calibrated with a commercially available breathalyzer before testing on the device. (B) Normalized response (NR) of Id is plotted at different breath alcohol concentrations (BAC). NR = (I0–Id)/I0. n = 3.
