fig2

Figure 2. (A) Schematic of the torsion sensing mechanism. Changes in geometry by twisting increase the capacitance between the intertwined fibers; (B) The sensitivity of different numbers of hydrogel fibers and (C) their response-recovery spectra and (D) time comparison; (E) The resistance changes of repeated stretching of gel fibers at a constant rate; (F) The resistance changes of fibers at different tensile rates and (G) The resistance changes of SF during five hundred stretching cycles. SF: Single gel fiber.