Figure 1 | Scientific Reports

Figure 1

From: Multi-mode humidity sensing with water-soluble copper phthalocyanine for increased sensitivity and dynamic range

Figure 1

Humidity effect on gravimetric properties. (a) AFM image of CuPcTs film. Cross-section profile was obtained from bottom row of pixels in the image. (b) H2O adsorption isotherm (black circles) fit with five different isotherm models. The r2 values of each fit are shown in the inset bar graph. Fit lines correspond to colors used in the bar graph. Error bars correspond to noise in the measured QCM signal. (c) Mass change (ΔM) (black, left axis) of CuPcTs film during exposure to pulses of H2O vapor (blue, right axis). Red lines indicate examples of double exponential fits. (d) Ratio of double exponential fit parameters A2/A1 (black squares, left axis) and τ2/τ1 (red circles, right axis). Lines show linear fits. Error bars are propagated double exponential fitting errors.

Back to article page