Figure 17.

(a) Optical microscope image showing cross-sectional view of the sensor. The image clearly shows MCNT-coated cotton/Ni-decorated polyester layers and cotton substrates. Inset is a photograph of as-fabricated sensor. (b) Transient responses of the sensor under repetitive loading/unloading cycles for various pressures (5.51, 11 and 16.5 kPa). (c) A video snapshot of the operator touching the fabric with four fingers. (d) Schematic representation of bottom and top touch action by hand and the relevant capacitive response. The sensor operates stably and exhibits immediate response to the loaded/ unloaded pressure. Reprinted/adapted with permission from Ref. [174]. Copyright 2020, Association for Computing Machinery (ACM).