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The bending stiffness of carbon nanotube fiber (CNTF) arrays is over eight times lower than stainless steel fine wire. The bending stiffness of a four-channel array electrode bundle (black lines) was 2.4 ± 0.1 mN/mm for CNTF (yellow, P ≪ 0.01, R2 = 0.91) and 19.6 ± 0.5 mN/mm for SSW arrays (orange, P ≪ 0.01, R2 = 0.99). The CNTF arrays thus required 8.3 times less force to bend the same amount compared with a SSW array. SSW, stainless-steel wire.
