Four trajectories videos are mentioned in the main text to animate the motor rotation process, and are available online. To make thermal fluctuations less distracting, the trajectory videos were smoothed in VMD by averaging over a 20 frame moving window. We did not observe any noteworthy solvent motion, so solvent molecules were stripped out. To facilitate visualization, center-of-mass translation and rotation were removed and the stator atoms were aligned across snapshots to make the stator appear steady.