Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets

E.D. Bennet; C.M.O. Mahony; H.E. Potts; P. Everest; D. Rutherford; S. Askari; D.A. McDowell; D. Mariotti; C. Kelsey; F. Perez-Martin; N. Hamilton; P. Maguire; D.A. Diver

doi:10.1016/j.jaerosci.2016.05.002

Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets

E.D. Bennet, C.M.O. Mahony, H.E. Potts, P. Everest, D. Rutherford, S. Askari, D.A. McDowell, D. Mariotti, C. Kelsey, F. Perez-Martin, N. Hamilton, P. Maguire, D.A. Diver^*

^*Corresponding author for this work

Design, Manufacturing And Engineering Management

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

225 Downloads (Pure)

Abstract

In this paper we describe a novel method for delivering a precise, known amount of electric charge to a micron-sized solid target. Aerosolised microparticles passed through a plasma discharge will acquire significant electric charge. The fluid stability under evaporative stress is a key aspect that is core to the research. Initially stable charged aerosols subject to evaporation (i.e. a continually changing radius) may encounter the Rayleigh stability limit. This limit arises from the electrostatic and surface tension forces and determines the maximum charge a stable droplet can retain, as a function of radius. We demonstrate that even if the droplet charge is initially much less than the Rayleigh limit, the stability limit will be encountered as the droplet evaporates. The instability emission mechanism is strongly linked to the final charge deposited on the target, providing a mechanism that can be used to ensure a predictable charge deposit on a known encapsulated microparticle.

Original language	English
Pages (from-to)	53-60
Number of pages	8
Journal	Journal of Aerosol Science
Volume	100
Early online date	11 May 2016
DOIs	https://doi.org/10.1016/j.jaerosci.2016.05.002
Publication status	Published - 1 Oct 2016

Funding

The authors gratefully acknowledge support from EPSRC via Grant numbers EP/K006142/1 and EP/K006088/1 . We would like to acknowledge the initiative of the COST Action TD1208, which have contributed to significant knowledge exchange on the subject. Thanks are due also to the anonymous referees, whose careful observations have improved the paper. Lastly, we are grateful to Alasdair Wilson for his assistance in the preparation of this manuscript.

Keywords

charged droplets
electrostatics
instability
plasma
target charging

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10.1016/j.jaerosci.2016.05.002Licence: CC BY 4.0

Bennet-etal-JAS-2016-Precision-charging-of-microparticles-in-plasma-via-the-Rayleigh-instabilityFinal published version, 500 KBLicence: CC BY 4.0

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Bennet, E. D., Mahony, C. M. O., Potts, H. E., Everest, P., Rutherford, D., Askari, S., McDowell, D. A., Mariotti, D., Kelsey, C., Perez-Martin, F., Hamilton, N., Maguire, P., & Diver, D. A. (2016). Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets. Journal of Aerosol Science, 100, 53-60. https://doi.org/10.1016/j.jaerosci.2016.05.002

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title = "Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets",

abstract = "In this paper we describe a novel method for delivering a precise, known amount of electric charge to a micron-sized solid target. Aerosolised microparticles passed through a plasma discharge will acquire significant electric charge. The fluid stability under evaporative stress is a key aspect that is core to the research. Initially stable charged aerosols subject to evaporation (i.e. a continually changing radius) may encounter the Rayleigh stability limit. This limit arises from the electrostatic and surface tension forces and determines the maximum charge a stable droplet can retain, as a function of radius. We demonstrate that even if the droplet charge is initially much less than the Rayleigh limit, the stability limit will be encountered as the droplet evaporates. The instability emission mechanism is strongly linked to the final charge deposited on the target, providing a mechanism that can be used to ensure a predictable charge deposit on a known encapsulated microparticle.",

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Bennet, ED, Mahony, CMO, Potts, HE, Everest, P, Rutherford, D, Askari, S, McDowell, DA, Mariotti, D, Kelsey, C, Perez-Martin, F, Hamilton, N, Maguire, P & Diver, DA 2016, 'Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets', Journal of Aerosol Science, vol. 100, pp. 53-60. https://doi.org/10.1016/j.jaerosci.2016.05.002

TY - JOUR

T1 - Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets

AU - Bennet, E.D.

AU - Mahony, C.M.O.

AU - Potts, H.E.

AU - Everest, P.

AU - Rutherford, D.

AU - Askari, S.

AU - McDowell, D.A.

AU - Mariotti, D.

AU - Kelsey, C.

AU - Perez-Martin, F.

AU - Hamilton, N.

AU - Maguire, P.

AU - Diver, D.A.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - In this paper we describe a novel method for delivering a precise, known amount of electric charge to a micron-sized solid target. Aerosolised microparticles passed through a plasma discharge will acquire significant electric charge. The fluid stability under evaporative stress is a key aspect that is core to the research. Initially stable charged aerosols subject to evaporation (i.e. a continually changing radius) may encounter the Rayleigh stability limit. This limit arises from the electrostatic and surface tension forces and determines the maximum charge a stable droplet can retain, as a function of radius. We demonstrate that even if the droplet charge is initially much less than the Rayleigh limit, the stability limit will be encountered as the droplet evaporates. The instability emission mechanism is strongly linked to the final charge deposited on the target, providing a mechanism that can be used to ensure a predictable charge deposit on a known encapsulated microparticle.

AB - In this paper we describe a novel method for delivering a precise, known amount of electric charge to a micron-sized solid target. Aerosolised microparticles passed through a plasma discharge will acquire significant electric charge. The fluid stability under evaporative stress is a key aspect that is core to the research. Initially stable charged aerosols subject to evaporation (i.e. a continually changing radius) may encounter the Rayleigh stability limit. This limit arises from the electrostatic and surface tension forces and determines the maximum charge a stable droplet can retain, as a function of radius. We demonstrate that even if the droplet charge is initially much less than the Rayleigh limit, the stability limit will be encountered as the droplet evaporates. The instability emission mechanism is strongly linked to the final charge deposited on the target, providing a mechanism that can be used to ensure a predictable charge deposit on a known encapsulated microparticle.

KW - charged droplets

KW - electrostatics

KW - instability

KW - plasma

KW - target charging

U2 - 10.1016/j.jaerosci.2016.05.002

DO - 10.1016/j.jaerosci.2016.05.002

M3 - Article

AN - SCOPUS:84973443035

SN - 0021-8502

VL - 100

SP - 53

EP - 60

JO - Journal of Aerosol Science

JF - Journal of Aerosol Science

ER -

Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets

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