Nanoplastics are plastics that have been discarded from our daily lives and that enter ecosystems in the size scale below 1 micrometer after their physical and chemical disintegration. The detection of nanoplastics is limited because their concentration is low and their size is extremely small. Researchers have recently used an electro-photonic tweezer along with metal nanoparticles to concentrate ultrafine nanoplastics, and report the development of a real-time detection system using light.