Fig. 3: Real-time THC vapor exposure and detection. | Communications Chemistry

Fig. 3: Real-time THC vapor exposure and detection.

From: Surface engineering of zinc phthalocyanine organic thin-film transistors results in part-per-billion sensitivity towards cannabinoid vapor

Fig. 3

(a) Schematic showing the application of THC vapor to a ZnPc OTFT, (b) the effects of heated air, (c) the effects of continual THC vapor exposure on 200, 400, and 800 Å ZnPc OTFTs, (d) the effects of periodic THC exposure on a 200 Å ZnPc OTFT, and (e) the effects of 40 ppb cigarette smoke on 200 Å ZnPc OTFTs. A VSD of −50 V was held and a VGS of −40 V and was pulsed at a rate of 20 milliseconds on 80 milliseconds off over a period of 120 seconds while 40 ppb THC vapor was continually or periodically flowed over the surface of the OTFT in a 50 mL chamber. Slope was calculated from 20 to 120 seconds.

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