A new type of robot can easily pick up, transport, and manipulate objects ranging from soft tofu to nuts and bolts. Inspired by the velvet worm, the robot ejects sticky secretions. The magnetically adhesive, untethered robot also removed a tumor from a mouse leg, showcasing its potential for surgical interventions. Developed from magnetic micro- and nanoparticles called magnetorheological elastomers, the new X-shaped robot clings to objects regardless of surface stiffness or roughness. By applying external magnetic fields, the team steered the robot to accomplish tasks, adjusting the strength of its adhesion, shape, and grasping technique. In tests, the robot successfully and stably grasped replicas of pig tissue, according to a press release. The robot also successfully moved moist soft tofu, wet salmon roe, and organs. It even assisted in surgically removing mouse tumors. Moreover, the robot unscrewed a nut from a bolt, demonstrating its ability to adapt to various substances. Achieving delicate adhesion control over various target surfaces has been a substantial challenge. It is essential to be able to grasp biological or nonbiological surfaces that are wrinkled, soft and have low preload.
| Material Used | Structured magnetorheological material |
|---|---|
| Researchers | Hyeongho Min and colleagues |
| Funding | Max Planck Society |
| Published In | Science Advances |
| Robot Design | The robot was constructed by pouring the uncured composite polymer into a mold manufactured using a 3D printer and cast to properly grip the tumor cell. |
| Control Method | The robot's soft body was wrapped around a 3D-printed structure modeled after the tumor cell and exposed to a large, uniform magnetic field of 1.4 T. |
