Self-Powered System with Wireless Data Transmission

TLDR

We demonstrate the first self‑powered system driven by a nanogenerator that works wirelessly and independently for long‑distance data transmission. The system uses a free‑cantilever nanogenerator composed of a five‑layer ZnO nanowire structure, coupled with a rectifier, capacitor, sensor, and RF transmitter. The device generated 10 V at 0.12 % strain, delivered over 0.6 µA (10 mW cm⁻³), and transmitted signals up to 10 m, demonstrating the feasibility of ZnO nanowire nanogenerators for self‑powered wireless sensing.

Abstract

We demonstrate the first self-powered system driven by a nanogenerator (NG) that works wirelessly and independently for long-distance data transmission. The NG was made of a free cantilever beam that consisted of a five-layer structure: a flexible polymer substrate, ZnO nanowire textured films on its top and bottom surfaces, and electrodes on the surfaces. When it was strained to 0.12% at a strain rate of 3.56% S–1, the measured output voltage reached 10 V, and the output current exceeded 0.6 μA (corresponding power density 10 mW/cm3). A system was built up by integrating a NG, rectification circuit, capacitor for energy storage, sensor, and RF data transmitter. Wireless signals sent out by the system were detected by a commercial radio at a distance of 5–10 m. This study proves the feasibility of using ZnO nanowire NGs for building self-powered systems, and its potential application in wireless biosensing, environmental/infrastructure monitoring, sensor networks, personal electronics, and even national security.