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. 2021 Jul 2;12:4082. doi: 10.1038/s41467-021-24382-4

Fig. 5. Sensing applications of PAA/betaine elastomer-based iontronic sensors.

Fig. 5

a Strain-dependent resistance changes of PAA/betaine elastomer. b Real-time response curves measured at fixed strains of 50, 100, 150 and 200% for ten cycles each. c, d The elastomer-based strain sensor senses human finger bending and swallowing movements. e Relative resistance variations of the elastomer-based strain sensor upon stretching to 200% strain for 350 cycles. f Temperature-induced real-time resistance changes of PAA/betaine elastomer between −25 and 70 °C. g Schematic structure for the PAA/betaine elastomer-based iontronic pressure sensor. h Pressure-dependent capacitance variations (loading speed: 5 mm min−1). S1, S2, and S3 are the calculated sensitivities. i Response time at the loading pressure of 0.36 kPa. j Dynamic loading/unloading curves at different pressures. k Synchronized capacitive response of four iontronic sensors adhered on a glove by pressing with different fingers.