Asymmetric pores in a silicon membrane acting as massively parallel brownian ratchets

@article{Matthias2003AsymmetricPI,
  title={Asymmetric pores in a silicon membrane acting as massively parallel brownian ratchets},
  author={Sven Matthias and Frank M{\"u}ller},
  journal={Nature},
  year={2003},
  volume={424},
  pages={53-57}
}
The brownian motion of mesoscopic particles is ubiquitous and usually random. But in systems with periodic asymmetric barriers to movement, directed or ‘rectified’ motion can arise and may even modulate some biological processes. In man-made devices, brownian ratchets and variants based on optical or quantum effects have been exploited to induce directed motion, and the dependence of the amplitude of motion on particle size has led to the size-dependent separation of biomolecules. Here we… CONTINUE READING