### Abstract

We propose a technique for separation of particles based on a nonlinear coupling between an applied force and the induced transverse drift in a two-dimensional system with broken reflection symmetry transverse to the force. Further, if the system has reflection symmetry parallel to the force, the drift velocity is independent of the sign of the force. Thus, an ac force causes a net drift only in the transverse direction, allowing for efficient separation even in a very small system. In an appropriately constructed device, particles with diffusion coefficients below and above a threshold move in opposite directions, allowing for continuous separation of significant amounts of molecules.

Original language | English |
---|---|

Pages (from-to) | 7781-7784 |

Number of pages | 4 |

Journal | Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics |

Volume | 58 |

Issue number | 6 B |

Publication status | Published - Dec 1998 |

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### ASJC Scopus subject areas

- Mathematical Physics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Statistical and Nonlinear Physics

### Cite this

*Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics*,

*58*(6 B), 7781-7784.

**ac separation of particles by biased Brownian motion in a two-dimensional sieve.** / Derényi, I.; Astumian, R. Dean.

Research output: Contribution to journal › Article

*Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics*, vol. 58, no. 6 B, pp. 7781-7784.

}

TY - JOUR

T1 - ac separation of particles by biased Brownian motion in a two-dimensional sieve

AU - Derényi, I.

AU - Astumian, R. Dean

PY - 1998/12

Y1 - 1998/12

N2 - We propose a technique for separation of particles based on a nonlinear coupling between an applied force and the induced transverse drift in a two-dimensional system with broken reflection symmetry transverse to the force. Further, if the system has reflection symmetry parallel to the force, the drift velocity is independent of the sign of the force. Thus, an ac force causes a net drift only in the transverse direction, allowing for efficient separation even in a very small system. In an appropriately constructed device, particles with diffusion coefficients below and above a threshold move in opposite directions, allowing for continuous separation of significant amounts of molecules.

AB - We propose a technique for separation of particles based on a nonlinear coupling between an applied force and the induced transverse drift in a two-dimensional system with broken reflection symmetry transverse to the force. Further, if the system has reflection symmetry parallel to the force, the drift velocity is independent of the sign of the force. Thus, an ac force causes a net drift only in the transverse direction, allowing for efficient separation even in a very small system. In an appropriately constructed device, particles with diffusion coefficients below and above a threshold move in opposite directions, allowing for continuous separation of significant amounts of molecules.

UR - http://www.scopus.com/inward/record.url?scp=4243927162&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243927162&partnerID=8YFLogxK

M3 - Article

VL - 58

SP - 7781

EP - 7784

JO - Physical review. E

JF - Physical review. E

SN - 2470-0045

IS - 6 B

ER -