Micro-/nanorobot technology has developed rapidly in recent years due to their great potential to perform multiple tasks. Here, we develop magnetic microrobots prepared as polycaprolactone/Fe3O4 microspheres covered by micellar polyethyleneimine and use them to efficiently remove a nerve agent from contaminated water. The magnetic polymeric microrobots presented in this work removed around 60% of the nerve agent from water samples in a short time. The attractive performance of these magnetic microrobots offers a very promising approach to large-scale water treatment for environmental remediation.

Center for Advanced Functional Nanorobots Department of Inorganic Chemistry University of Chemistry and Technology Prague 166 28 Prague 6 Czech Republic

Chemical Research Institute Andres M del Río University of Alcalá Alcalá de Henares 28802 Madrid Spain

Department of Analytical Chemistry Physical Chemistry and Chemical Engineering University of Alcalá Alcalá de Henares 28802 Madrid Spain

Department of Medical Research China Medical University Hospital China Medical University 40402 Taichung Taiwan

Future Energy and Innovation Laboratory Central European Institute of Technology Brno University of Technology CZ 612 00 Brno Czech Republic

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