Biofilms are layers of microbes that can attach stubbornly to the surface of objects, including human teeth. For laboratory and medical settings, biofilms pose a problem for keeping clean conditions. To help out, researchers have developed magnetic microrobots that can remove Streptococcus mutans from surfaces by generating free radicals that kill the bacteria and scrubbing away the biofilm using iron oxide particles controlled by the microrobot’s magnetic field.
G. Hwang et al., “Catalytic antimicrobial robots for biofilm eradication,” Science Robotics, doi:10.1126/scirobotics.aaw2388, 2019.
