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. 2015 Jun 1;6:7258. doi: 10.1038/ncomms8258

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(a) Bending response of actuators based on g-CN_800 °C and RGO electrodes at an applied square wave voltage of ±3 V with a frequency of 0.1 Hz. (b) Time-dependent displacement of g-CN_800 °C and RGO actuators under 3 V.