Figure 14.

(a): (i) Fabrication process of 3D paper-based humidity sensor by using stencil and origami techniques. (ii) Graph of the real-time capacitance change at different humidities. Reproduced with permission from [69], [Applied Materials]; published by American Chemical Society, 2022. (b): (i) The structure of the origami inspired strain sensor. (ii) The folding of the sensing area according to the different prestrain. (iii) The graph of the capacitance changes under the strain series of step up and down [70].