Precision charging of microparticles in plasma via the Rayleigh instability for evaporating charged liquid droplets
| Autor: | Davide Mariotti, Fatima Perez-Martin, C.M.O. Mahony, Neil Hamilton, Colin Kelsey, Paul Maguire, Euan Bennet, Hugh Potts, David A. McDowell, Sadegh Askari, Paul Everest, Declan A. Diver, David Rutherford |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Atmospheric Science
Environmental Engineering Evaporation Analytical chemistry 02 engineering and technology 01 natural sciences Electric charge Instability 010305 fluids & plasmas Physics::Fluid Dynamics Surface tension Plasma symbols.namesake Materials Science(all) Electrostatics 0103 physical sciences Environmental Chemistry Rayleigh–Taylor instability Rayleigh scattering Fluid Flow and Transfer Processes Chemistry Mechanical Engineering Radius Mechanics 021001 nanoscience & nanotechnology Pollution symbols Target Charging 0210 nano-technology Charged droplets |
| Zdroj: | Journal of Aerosol Science. 100:53-60 |
| ISSN: | 0021-8502 |
| DOI: | 10.1016/j.jaerosci.2016.05.002 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect