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Actuator and CNC morphologies. (a) SEM image of interface region, showing aligned CNTs in CNC layer. (b) Optical image of matrix-rich regions in a CNC composite due to CNT collapse (as evidenced by light grey neat Nafion regions) from fast solvent evaporation. (c) SEM image of VA-CNT/Nafion composite with CNT array in thickness (x3) direction. The image demonstrates that large-area VA-CNT/Nafion CNC films can be synthesized free of defects.
