Skip to main content
. 2020 Nov 4;5(45):29492–29503. doi: 10.1021/acsomega.0c04433

Figure 2.

Figure 2

Frequency shifts of QCM sensors functionalized with (a, b) PAN and (c, d) PVDF/PVAc thin films under exposure to different volatile organic compounds (VOCs, i.e., methanol, ethanol, propanol, butanol, benzene, toluene, and xylene) at increasing concentrations of up to 20 and 40 mg/L for alcohol and BTX samples, respectively. Full-cycle dynamic responses of the QCM sensors functionalized with (e) PAN and (f) PVDF/PVAc thin films under influence of various VOCs at a concentration of 1 mg/L. These QCMs belong to the sensor array inside the e-nose system.