Overview
- Researchers in the Czech Republic built microrobots from MXene, a flat nanomaterial with a high surface area, coated with nickel nanoparticles so external rotating magnetic fields make them move without onboard power.
- In controlled laboratory trials the swarms pulled microplastics from water and soil, removing as much as 94% of polystyrene and 89% of PET in water and about 81% of polystyrene and 72% of PET in a soil model.
- The devices work by physically contacting and binding plastic as they roll and swim, and researchers say active motion improves contact with trapped particles compared with passive adsorbents.
- Key hurdles remain before real-world use: tests in natural rivers and fields are needed, and teams must prove reliable recovery of the robots, plus assess nickel release, toxicity, stability and reuse.
- If those safety and scalability questions are resolved, the approach could offer a new tool for cleanup because it targets particles inside soil pores and water columns rather than relying on passive filtration.