Fig. 4: Application of conductive e-rTRM7 fiber as motion sensor.
From: Extensible and self-recoverable proteinaceous materials derived from scallop byssal thread
a Schematic illustration of fabricating electronic rTRM7 (e-rTRM7) fiber and its applications in wearable and implantable electrodes. b Photograph of e-rTRM7 fiber. c SEM images of side view and sectional view of the e-rTRM7 fiber showing graphene flakes are randomly embedded in the films of e-rTRM7 fiber. The white arrows point to the graphene flakes. d Raman spectrum of e-rTRM7 and rTRM7 fibers. Typical graphene peaks at 1350, 1574, 2701 cm−1 are appeared in e-rTRM7 fiber, while not in rTRM7 fiber. A.U., arbitrary unit. e Resistance change of e-rTRM7 fiber over time under cycle loading-unloading stretching. e-rTRM7 fiber is stretched to 20% strain and relaxed to 0% strain in two continuous cycles. The resistance is positively related to the strain of e-rTRM7 fiber (red part). f e-rTRM7 fiber applied to knuckle as a motion sensor. Resistance changes of e-rTRM7 fiber over time when hand fist for 6 s and relax for 6 s repeatedly corresponding to the picture. g EMG signals produced by the fist and relaxation. h, i The in vivo action potential signals from tibialis anterior muscle and tibial nerve induced by the increased stimulating current on common peroneal nerve of the rat.
