Figure 5

Deformation-based physical sensing mechanisms. (a) AuNW-coated tissue paper-based pressure sensor. Schematic illustration depicting the pressure-induced deformation-based working mechanism of the sensor. Adapted with permission from Ref. 3. Copyright 2014 Macmillan Publishers Limited. (b) Micropyramid-based stretchable resistive pressure sensor. Schematic illustration showing the circuit model describing the pressure-induced deformation-based sensing principle of the device and the finite element analysis illustrating the distribution of stress on the micropyramid-based electrode upon the application of external pressure. Adapted with permission from Ref. 17. Copyright 2014 Wiley-VCH Verlag GmbH & Co. (c) Iontronic microdroplet array (IMA) flexible tactile sensor. Schematic illustration showing the interfacial capacitive sensing principle of the IMA flexible tactile sensor. Adapted with permission from Ref. 105. Copyright 2014 The Royal Society of Chemistry. (d) CNT-based elastic strain sensor. Schematic illustration showing the operating principle of the CNT fiber-based strain sensor under different strain regimes. Adapted with permission from Ref. 70. Copyright 2015 American Chemical Society. (e) Skin-inspired interlocked microdome array-based tactile sensor. Schematic illustration showing the normal and shear force detection capability of the interlocked microdome arrays based on the distinct surface deformation of the microdomes upon the application of different forces. Adapted with permission from Ref. 7. Copyright 2015 American Chemical Society.