Post-Transition\nMetal Dichalcogenide SnS<sub>2</sub> Nanoflower/PVDF Composite: A\nSmart Wearable Self-Powered Mechanosensor

The\nescalating demand for wearables has led to a surge in the development\nof portable and flexible electronics. Consequently, exploring different\nmaterials for the efficient design of the device has become an inevitable\naspect of this particular research area. Therefore, in this work,\nwe present post-transition metal dichalcogenide tin disulfide (SnS<sub>2</sub>) nanoflowers, to effectively engineer the polyvinylidene\nfluoride (PVDF) functional layer, which serves as the heart of the\ndevice. These hydrothermally grown SnS<sub>2</sub> nanoflowers can\nsignificantly nurture the physiochemical properties of the PVDF matrix.\nConsequently, the assembled optimized device is capable of generating\nan output voltage of 60 ± 4 V, with an output current of 8 ±\n0.4 μA, while maintaining a good output power density of 87.11\nμW·cm<sup>–2</sup>. The device successfully harvested\nmechanical energies from several biomechanical movements including\nfinger, elbow, neck, and wrist bending. Furthermore, the optimized\ndevice demonstrated a high efficiency in static and dynamic pressure\nsensing. This utilization of post-transition metal dichalcogenides\npaves the way for groundbreaking improvements in the fields of biomechanical\nenergy harvesting and static and dynamic pressure sensing.