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. 2022 Oct 21;9(12):nwac227. doi: 10.1093/nsr/nwac227

Figure 2.

Figure 2.

Characterizations of sensing materials and influence of microstructures on sensor performance. (a) Comparisons of the pressure measurement performance of sensors with the ECC electrode and these with the gold thin-film electrode at a test frequency of 300 kHz. In the inset, the enlarged view of lower pressure is displayed. (b) Comparisons of the performance of sensors with different dielectric layer surface microstructures. (c) The frequency dependence of area capacitance with different PVDF-HFP : [EMIM] [TFSI] ratios. The enlarged view of the plot at lower frequency is shown in the inset. (d) The tensile stress-strain curves of PVDF-HFP : [EMIM] [TFSI] with ratios of 1 : 3, 1 : 3.5 and 1 : 4. (e) Density and porosity of the micro-pit structures of MBM films prepared at different temperatures. The average density represents the average number of micro-pit structures per square centimeter. The porosity represents the percentage of the whole film area that micro-pit structures account for. (f) Capacitance changes as a function of applied pressure under different IL concentrations. Photographs of MBM films prepared at (g) 28°C, (h) 34°C and (i) 40°C.