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a Schematic illustration of calculation model of strain. b Resistance of pristine and self-healed electrodes under various strains and c under strain of 0% and 0.48% measured by a digital multimeter. d Visual controlling by using CB/G-CNF/PVA electrodes, CB/G-PVA electrodes and commercial silver electrodes. The different brightnesses of LEDs indicate bending states. e SEM images of self-healed position of CB/G-CNF/PVA electrodes, CB/G-PVA electrodes and silver electrodes.
