Maguire, P. D. et al. (2015) Controlled microdroplet transport in an atmospheric pressure microplasma. Applied Physics Letters, 106(22), 224101. (doi: 10.1063/1.4922034)
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Publisher's URL: http://scitation.aip.org/content/aip/journal/apl/106/22/10.1063/1.4922034
Abstract
We report the controlled injection of near-isolated micron-sized liquid droplets into a low temperature He-Ne steady-state rf plasma at atmospheric pressure. The H2O droplet stream is constrained within a 2 mm diameter quartz tube. Imaging at the tube exit indicates a log-normal droplet size distribution with an initial count mean diameter of 15 μm falling to 13 μm with plasma exposure. The radial velocity profile is approximately parabolic indicating near laminar flow conditions with the majority of droplets travelling at >75% of the local gas speed and having a plasma transit time of <100 μs. The maximum gas temperature, determined from nitrogen spectral lines, was below 400 K and the observed droplet size reduction implies additional factors beyond standard evaporation, including charge and surface chemistry effects. The demonstration of controlled microdroplet streams opens up possibilities for gas-phase microreactors and remote delivery of active species for plasma medicine.
| Item Type: | Articles |
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| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Potts, Hugh and Bennet, Dr Euan and Diver, Professor Declan |
| Authors: | Maguire, P. D., Mahony, C. M. O., Kelsey, C. P., Bingham, A. J., Montgomery, E. P., Bennet, E. D., Potts, H. E., Rutherford, D. C. E., McDowell, D. A., Diver, D., and Mariotti, D. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Applied Physics Letters |
| Publisher: | American Institute of Physics |
| ISSN: | 0003-6951 |
| ISSN (Online): | 1077-3118 |
| Copyright Holders: | Copyright © 2015 The Authors |
| First Published: | First published in Applied Physics Letters 106(22):224101 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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