IV sweeps raw data for POM film humidity and CO2 testing
IV measurements were performed between -2 V and 2 V with a step size of 0.1 V. Measurements were taken in the forward and reverse direction. The resistance of the device was calculated through the inverse slope of the resultant linear line from which the conductivity was calculated using equation 4.1. The length and width of the channel were measured with an optical microscope.
Where σ: conductivity, ρ: resistivity, R: resistance in ohms, L: length in metres, A: the area in m2, V: voltage, and I: current.
Samples were measured in a humidity-controlled environment with a purpose-built holder and printed circuit board (PCB), and a water bubbler to control humidity coupled with a QTenki humidity sensor and temperature probe (Dracal Technologies). Four repeat measurements were taken for each POM electrode.