Fig. 5: Highly conformal ultrathin magnetic soft robots.

A triangle-shaped magnetic soft robot (lateral dimensions: 12 × 5.8 mm2; thickness 45 µm) can be inserted in/released from a pipette tip with an opening of 1.8 mm in diameter. The magnetic manipulation allows the robot to minimize its cross-section, which enables its insertion into the pipette (Supplementary Movie 14). The robot is driven by a square wave magnetic field (2 mT, 2 Hz). Scale bar, 2 mm.