“…Capacitive sensors consist of two conductive plates (Figure 2(a)) separated by a compressible dielectric material [47],(b) nano-scale image of conductive rubber [48], (c) structure of piezoresistive tactile array [49], (d) piezoresistive fabric tactile sensor [50], (e) schematic of electrode layer of the 3D-shaped tactile sensor [34], (f) tactile image of a piezo-resistive pressure sensor array [35].…”