fig4

Figure 4. Performances of the stretchable SNIPS under a state of stretching deformation. (A) The variation of initial capacitance of SNIPS under stretching up to 50%; (B) Finite element modeling of stress distribution in a device under applied stretching up to 50%. The encapsulated layer and dielectric layer are modeled as incompressible materials with Young’s moduli of 0.5 MPa and 60 MPa, respectively; (C) The capacitance changes during stretching-recovery cycles over 5,000 times under strains of 30%; (D) Normalized capacitance changes of the SNIPS under different strains and pressures. SNIPS: Stretchable all-nanofiber iontronic pressure sensor.