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Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit
The electric curtain is a platform developed to lift and transport charged particles in air. Its premise is the manipulation of charged particles; however, fewer investigations isolate dielectric forces that are observed at lower voltages (i.e., less than the Paschen limit). This work focuses on obs...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8878500/ https://www.ncbi.nlm.nih.gov/pubmed/35208412 http://dx.doi.org/10.3390/mi13020288 |
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author | Williams, Stuart J. Schneider, Joseph D. King, Benjamin C. Green, Nicolas G. |
author_facet | Williams, Stuart J. Schneider, Joseph D. King, Benjamin C. Green, Nicolas G. |
author_sort | Williams, Stuart J. |
collection | PubMed |
description | The electric curtain is a platform developed to lift and transport charged particles in air. Its premise is the manipulation of charged particles; however, fewer investigations isolate dielectric forces that are observed at lower voltages (i.e., less than the Paschen limit). This work focuses on observations of simultaneous dielectrophoretic and electrostatic forces. The electric curtain was a printed circuit board with interdigitated electrodes (0.020 inch width and spacing) coated with a layer of polypropylene, where a standing wave or travelling wave AC signal was applied (50 Hz) to produce an electric field below the Paschen limit. Soda lime glass beads (180–212 µm) demonstrated oscillatory rolling via dielectrophoretic forces. In addition, several particles simultaneously experienced rapid projectile repulsion, a behavior consistent with electrostatic phenomena. This second result is discussed as a particle-induced local increase in the electric field, with simulations demonstrating that a particle in close proximity to the curtain’s surface produces a local field enhancement of over 2.5 times. The significance of this is that individual particles themselves can trigger electrostatic repulsion in an otherwise dielectric system. These results could be used for advanced applications where particles themselves provided triggered responses, perhaps for selective sorting of micrometer particles in air. |
format | Online Article Text |
id | pubmed-8878500 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-88785002022-02-26 Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit Williams, Stuart J. Schneider, Joseph D. King, Benjamin C. Green, Nicolas G. Micromachines (Basel) Article The electric curtain is a platform developed to lift and transport charged particles in air. Its premise is the manipulation of charged particles; however, fewer investigations isolate dielectric forces that are observed at lower voltages (i.e., less than the Paschen limit). This work focuses on observations of simultaneous dielectrophoretic and electrostatic forces. The electric curtain was a printed circuit board with interdigitated electrodes (0.020 inch width and spacing) coated with a layer of polypropylene, where a standing wave or travelling wave AC signal was applied (50 Hz) to produce an electric field below the Paschen limit. Soda lime glass beads (180–212 µm) demonstrated oscillatory rolling via dielectrophoretic forces. In addition, several particles simultaneously experienced rapid projectile repulsion, a behavior consistent with electrostatic phenomena. This second result is discussed as a particle-induced local increase in the electric field, with simulations demonstrating that a particle in close proximity to the curtain’s surface produces a local field enhancement of over 2.5 times. The significance of this is that individual particles themselves can trigger electrostatic repulsion in an otherwise dielectric system. These results could be used for advanced applications where particles themselves provided triggered responses, perhaps for selective sorting of micrometer particles in air. MDPI 2022-02-11 /pmc/articles/PMC8878500/ /pubmed/35208412 http://dx.doi.org/10.3390/mi13020288 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Williams, Stuart J. Schneider, Joseph D. King, Benjamin C. Green, Nicolas G. Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title | Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title_full | Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title_fullStr | Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title_full_unstemmed | Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title_short | Particle-Induced Electrostatic Repulsion within an Electric Curtain Operating below the Paschen Limit |
title_sort | particle-induced electrostatic repulsion within an electric curtain operating below the paschen limit |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8878500/ https://www.ncbi.nlm.nih.gov/pubmed/35208412 http://dx.doi.org/10.3390/mi13020288 |
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