Steering nanobots in crowded biological environments raises questions about the limits on the size of a steerable propeller under thermal noise. Here, the authors theoretically investigate torque-driven actuation of magnetic nanohelices in a viscous fluid, revealing that weak rotational diffusion significantly disrupts their orientation and propulsion, offering insights into the challenges of controllable steering at the nanoscale.
- Ashwani Kr. Tripathi
- Konstantin I. Morozov
- Alexander M. Leshansky
