Self-Starting Micromotors in a Bacterial Bath

Details Self-Starting Micromotors in a Bacterial Bath Self-Starting Micromotors in a Bacterial Bath

2008-12-12

arxiv.org/abs/0812.2375v1

Phys. Rev. Lett. 102, 048104 (2009)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.048104

Micromotors pushed by biological entities, like motile bacteria, constitute a fascinating way to convert chemical energy into mechanical work at the micrometer scale. Here we show, by using numerical simulations, that a properly designed asymmetric object can be spontaneously set into the desired motion when immersed in a chaotic bacterial bath. Our findings open the way to conceive new hybrid microdevices exploiting the mechanical power production of bacterial organisms. Moreover, the system provides an example of how, in contrast with equilibrium thermal baths, the irreversible chaotic motion of active particles can be rectified by asymmetric environments.

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