(a) Schematic illustration of the multicore-shell fiber printing process of capacitive strain sensors in a four-layer configuration. (b, c) The conductive and elastomeric inks are loaded into separate reservoirs. (d) Illustrations of the outlet region where the printing simultaneously forms the multicore-shell. (e) Magnified optical image of the printed multicore-shell segmented view. (f) Two fully printed capacitive strain sensors [39
]. Reproduced with permission. Copyright John Wiley and Sons, 2015.