Affiliation:
1. College of Physics Science and Technology, Hebei University 1 , Baoding 071002, China
2. Hebei Research Center of the Basic Discipline for Computational Physics, Hebei University 2 , Baoding 071002, China
Abstract
Directional transport-dominated particle separation presents major challenges in many technological applications. The Feynman ratchet can convert the random perturbation into directional transport of particles, offering innovative separation schemes. Here, we propose the design of a dusty plasma ratchet system to accomplish the separation of micrometer-sized particles. The dust particles are charged and suspended at specific heights within the saw channel, depending on their sizes. Bi-dispersed dust particles can flow along the saw channel in opposite directions, resulting in a perfect purity of particle separation. We discuss the underlying mechanism of particle separation, wherein dust particles of different sizes are suspended at distinctive heights and experience electric ratchet potentials with opposite orientations, leading to their contrary flows. Our results demonstrate a feasible and highly efficient method for separating micrometer-sized particles.
Funder
National Natural Science Foundation of China
National Natural Science Fonddation of China
Interdisciplinary Research program of Natural Science of Hebei University
Hebei Natural Science Fund
Scientific Research and Innovation Team project of Hebei University
Subject
Physics and Astronomy (miscellaneous)