Multi-responsive 3D Structured PVDF Cube Switch for Security System Using Piezoelectric Anisotropy

Advancements in flexible electronics using piezoelectric materials have paved the way for their numerous applications. In this study, we suggest a 3D structured polyvinylidene fluoride (PVDF) film cube switch to maximize piezoelectric anisotropy and flexibility. Unlike piezoelectric material-based flexible electronics, PVDF cube switches have a simple design and easy fabrication process. Each side of the cube switch demonstrates independent voltage signals with pressing displacements and corresponding directions. With cutting angle variation and planar figure designs, derived cube switches respond with various combination of voltage waveforms. PVDF switches can endure more than 1000 cycles of 70% vertical strain in terms of both electrically and mechanically. As an application, we establish security system with multi-responsibility of a cube switch. This security system can protect users from potential threats owing to its multi-responsibility and user-dependent operability.