Figure 2
Configuration and results for yarn muscles electrochemically driven in a liquid electrolyte: (a) A two-end-tethered configuration for simultaneously measuring torsional and tensile actuation. (b) Torsional rotation (black) and axial length actuation (blue) versus time for a single-ply, twisted, non-coiled CNT yarn that is half-immersed in 0.2 M TBA.PF6 in acetonitrile and pulsed to +5 V (versus Ag/Ag + reference) and then to 0 V for about 5 s each. (c and d) Paddle rotation and tensile actuation during a cyclic potential scan at 50 mV/s. The electrolytes were 0.1 M BMP.TFSI in propylene carbonate (c) and 0.2 M TBA.PF6 in acetonitrile (d) [1].