Triboelectric and plasma charging of microparticles

Heijmans, Lcj Luuk; Nijdam, S Sander

doi:10.1209/0295-5075/114/64004

Cited by 8 publications

(13 citation statements)

References 16 publications

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“…Moreover, it is concluded that there was no flow turbulence to the extent that it influenced the particle trajectories. Heijmans and Nijdam [28] have shown that the triboelectric charge of 100 μm polystyrene particles can be as large as ±5 × 10 6 e. This shows that the triboelectric particle charge can be of the same magnitude or even larger than the particle charge in the active plasma region.…”

Section: Sheath Above Mesh Gridmentioning

confidence: 98%

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Charge control of micro-particles in a shielded plasma afterglow

Minderhout

Huijstee

Platier

et al. 2020

Plasma Sources Sci. Technol.

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In this work, charge control of micro-particles from ∼−40 to +10 elementary charges is presented. This is achieved at 0.9 mbar argon in the spatial afterglow of an inductively coupled plasma by solely changing the strength of an externally applied electric field. Crucial in the presented experiments is the use of a grounded mesh grid in the cross section of the setup, separating the active plasma region from the 'shielded'spatial afterglow. While in the regions above the mesh grid all particles reached a constant negative equilibrium charge, the actual control achieved in the shielded spatial afterglow can most probably be explained by variations of the local ion density. The achieved charge control not only opens up possibilities to study nano-scale surface charging physics on micro-meter length scales, it also contributes to the further development of plasma-based contamination control for ultra-clean low-pressure systems.

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Section: Sheath Above Mesh Gridmentioning

confidence: 98%

“…First of all, it is virtually impossible to generate or directly inject neutral particles in a system because of the triboelectric effect [27]. Consequently, a charge control technique must be able to reset the triboelectrically induced charge distribution, which includes both positively and negatively charged particles [28].…”

Section: Introductionmentioning

confidence: 99%

Charge control of micro-particles in a shielded plasma afterglow

Minderhout

Huijstee

Platier

et al. 2020

Plasma Sources Sci. Technol.

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“…The main element of the PPCI setup was a square glass tube filled with argon at 0.9 mbar (the base pressure was 5 × 10 −7 mbar). Monodisperse melamine formaldehyde (MF) particles were injected using a particle dispenser similar to those used in earlier studies 28,29 . These particles were (4.9 ± 0.2) µm in diameter and coated with a layer of silver of several hundred nanometers thickness to minimize triboelectric charging 30 .…”

mentioning

confidence: 99%

The charge of micro-particles in a low pressure spatial plasma afterglow

Minderhout¹,

Peijnenburg²,

Blom³

et al. 2019

J. Phys. D: Appl. Phys.

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“…A determining part of this system was a 1 m long square glass tube. The operating pressure was 90 Pa argon, with a background pressure of 10 −9 Pa. At the top of the tube, particles were injected by a particle dispenser similar to the ones used in previous research 64 , 65 . In the dispenser’s container, the particles repeatedly collided with each other and with the container’s walls, thereby triboelectrically charging the particles 13 and aiding the natural conformation of clustered microparticles.…”

Section: Methodsmentioning

confidence: 99%

Charge of clustered microparticles measured in spatial plasma afterglows follows the smallest enclosing sphere model

et al. 2021

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The plasma-induced charge of non-spherical microparticles is a crucial parameter in complex plasma physics, aerosol science and astrophysics. Yet, the literature describes this charge by two competing models, neither of which has been experimentally verified or refuted. Here we offer experimental proof that the charge on a two-particle cluster (doublet) in the spatial afterglow of a low-pressure plasma equals the charge that would be obtained by the smallest enclosing sphere and that it should therefore not be based on its geometrical capacitance but rather on the capacitance of its smallest enclosing sphere. To support this conclusion, the size, mass and charge of single particles (singlets) and doublets are measured with high precision. The measured ratio between the plasma-afterglow-induced charges on doublets and singlets is compared to both models and shows perfect agreement with the predicted ratio using the capacitance of the smallest enclosing sphere, while being significantly dissimilar to the predicted ratio based on the particle’s geometrical capacitance.

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Triboelectric and plasma charging of microparticles

Cited by 8 publications

References 16 publications

Charge control of micro-particles in a shielded plasma afterglow

Charge control of micro-particles in a shielded plasma afterglow

The charge of micro-particles in a low pressure spatial plasma afterglow

Charge of clustered microparticles measured in spatial plasma afterglows follows the smallest enclosing sphere model

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