A review of particle transport and separation by electrostatic traveling wave methods

Yu, Yue; Cilliers, J.J.; Hadler, K.; Starr, Stanley O.; Wang, Yanghua

doi:10.1016/j.elstat.2022.103735

Cited by 7 publications

(3 citation statements)

References 106 publications

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“…Many software are available for use to model and simulate the DEP forces and track the CNT motion. FlexPDE and FEMLAB can be used to simulate and analyze the electric field distribution around the electrodes [172][173][174]. COMSOL Multiphysics and ANSYS Workbench are a few examples of advanced software suitable for frontend geometry design with an excellent graphical user interface [21,175].…”

Section: Dielectrophoresis Evaluationmentioning

confidence: 99%

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

2023

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Carbon nanotubes (CNTs) are nominated to be the successor of several semiconductors and metals due to their unique physical and chemical properties. It has been concerning that the anisotropic and low controllability of CNTs impedes their adoption in commercial applications. Dielectrophoresis (DEP) is known as the electrokinetics motion of polarizable nanoparticles under the influence of non-uniform electric fields. The uniqueness of this phenomenon allows DEP to be employed as a novel method to align, assemble, separate, and manipulate CNTs suspended in liquid mediums. This article begins with a brief overview of CNT structure and production, with the emphasize on their electrical properties and response to electric fields. The DEP phenomenon as a CNT alignment method is demonstrated and graphically discussed, along with its theory, procedure, and parameters. We also discussed the side forces that arise in DEP systems and how they negatively or positively affect the CNT alignment. The article concludes with a brief review of CNT-based devices fabricated using DEP, as well as the method’s limitations and future prospects. 

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Section: Dielectrophoresis Evaluationmentioning

confidence: 99%

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

2023

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“…It was found that the uppermost portion of the lunar regolith can carry electrostatic charges due to the direct exposure to the solar wind plasma and solar ultraviolet radiation in local environment [11] . While, in recent years, with the development of In-situ Resource Utilization (ISRU) technologies, using its charging property to realize the lunar regolith in-situ utilization is brought to the scienti c frontiers [12] , which arouse our great interest. By applying an external electric eld (called electrostatic method), lunar regolith particles can be charged and particle manipulation can be realized, such as lunar regolith directed transport [13] [14] , collection [15] , size sorting [16] and bene ciation [17] .…”

Section: Introductionmentioning

confidence: 99%

Charging properties and particles dynamics of Chang’E-5 lunar sample in an external electric field

Qian

Liu

et al. 2023

Preprint

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Facing to the challenges of the lunar regolith resource in-situ utilization, applying an external electric field to manipulate lunar particle becomes a promising space particle control method, which is mainly dependent on the particle charging properties in the applied electric field. In the present work, the surficial lunar regolith sample returned from the Moon by the Chang’E-5 mission (CE5 LS) were used to study its charging properties and particles dynamics under the action of an applied external electric field for high-vacuum condition. Some interesting phenomena regarding the charging process and electrostatic projection were observed and discussed. The experimental data of particle charges, charge-to-mass ratio and the pre-collision parameters of CE5 LS were obtained. Furthermore, the influences of the projected CE5 LS collision on the target colliding surfaces were studied simultaneously. Our work would provide a solid support for the future study of the lunar regolith in-situ utilization and defense.

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“…Recent studies have shown the potential of electric curtains or electrostatic conveyors (EC) to transport fine particles, but also their ability to clean solar panels [3]. Electrostatic devices are comprised of several parallel electrodes that are incorporated into a dielectric substance and connected to high-voltage power sources [4]. The created electric field can levitate and move the charged particles over the surface without any noticeable energy consumption or moving parts [5].…”

Section: Introductionmentioning

confidence: 99%

Mechanics of Particle Motion in a Standing Wave Electric Curtain: A Numerical Study

2023

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Electrostatic curtains can be simple and yet efficient devices to manipulate micronized particles on flat surfaces. This paper aims to investigate the motion of a 60 µm dielectric particle on the surface of a standing-wave conveyor. The study is based on a numerical model that accounts for the many forces that could potentially influence the particle motion. For that purpose, a numerical calculation of electric field and particle movement was carried out. The particle position above the curtain surface is obtained by a resolution of the dynamic equations using the Runge–Kutta method. The electric field distribution in the space above the curtain is obtained by a finite element calculation of the Laplace equation. The simulation results demonstrated a net dependence of the particle trajectory and movement modes on applied voltage frequency. Overall, low frequencies, typically below 50 Hz, allow for higher levitation and better displacement of the particle over long distances. Conversely, higher frequencies significantly reduce levitation and displacement distance. Moreover, at higher frequencies (around 500 Hz), the particle can vibrate between electrodes without any displacement at all. It is then inferred that low frequency is needed to better carry particles using a standing-wave curtain.

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A review of particle transport and separation by electrostatic traveling wave methods

Cited by 7 publications

References 106 publications

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

Charging properties and particles dynamics of Chang’E-5 lunar sample in an external electric field

Mechanics of Particle Motion in a Standing Wave Electric Curtain: A Numerical Study

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