ArticleScientific reports2020
Aerosol classification by dielectrophoresis: a theoretical study on spherical particles.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
The possibilities and limitations using dielectrophoresis (DEP) for the dry classification of spherical aerosol particles was evaluated at low concentrations in a theoretical study. For an instrument with the geometry of concentric cylinders (similar to cylindrical DMA), the dependencies of target particle diameter [Formula: see text], resolution, and yield of the DEP classification on residence time, applied electric field strength, and pressure of the carrier gas were investigated. Further, the diffusion influence on the classification was considered. It was found that [Formula: see text] scales with the mean gas flow velocity [Formula: see text], classifier length L, and electric field strength E as [Formula: see text]. The resolution of the classification depends on the particle diameter and scales proportionally to [Formula: see text]. It is constrained by the flow ratio [Formula: see text] (i.e., sheath gas to aerosol flow), electrode diameters, and applied electric field strength. The classification yield increases with the ratio of the width of the extended outlet slit [Formula: see text] to the diffusion induced broadening [Formula: see text]. As expected, resolution and yield exhibit opposite dependencies on [Formula: see text]. Our simulations show that DEP classification can principally cover a highly interesting particle size range from 100 nm to [Formula: see text] while being directly particle size-selective and particle charge independent.
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