Researchers at National Taiwan University have developed a compact, self-powered water sensor that uses wave energy to detect pollutants like heavy metals, pesticides, and microplastics in real time, without any batteries. Using a rotational triboelectric nanogenerator and a sensitive transistor-based sensor, the device harvests energy from water movement to power itself continuously underwater. Tested in lab and river conditions, it reliably identifies tiny pollutant levels and operates sustainably in harsh environments. This breakthrough could enable long-term, remote water quality monitoring to protect ecosystems and public health.
