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A two-dimensional cold atmospheric plasma jet array for uniform treatment of large-area surfaces for plasma medicine
journal contribution
posted on 2010-06-03, 16:19 authored by Qiu-Yue Nie, Z. Cao, Chun-Sheng Ren, De Zhen Wang, Michael G. KongFor plasma treatment of inanimate surfaces and living tissues in
medicine, it is important to control plasma–sample interactions and to mitigate
non-uniform treatments of usually uneven sample surfaces so that effectiveness
of application can be reproduced for different biological samples, relatively
independently of their varying surface topologies and material characters. This
paper reports a scalable two-dimensional (2D) array of seven cold atmospheric
plasma (CAP) jets intended to achieve these two important requirements as
well as to address the unique challenge of jet–jet interactions. While the CAP
jet array can be configured to interact with a biological sample in either a
direct mode (used with an in situ sample) or a remote mode (used as an
afterglow), this study focuses on the direct mode. Using a downstream planar
electrode as a sample model, the spatial distribution of reactive species and
electrons delivered by individual jets of the 2D CAP jet array attains excellent
uniformity. Specifically, the spatial variation over 100μs is 5.6 and 7.9%,
respectively, for wavelength-integrated optical emission intensity, and for atomic
oxygen emission intensity at 845 nm when the oxygen admixture is 0.5% of
the helium carrier gas. It is also shown that the highest emission intensity at
845 nm occurs at O2/He = 0.5% under the best jet–jet uniformity conditions for
O2/He = 0.3–0.7%. These results indicate the potential of 2D CAP jet arrays for uniform treatment and for effective control of jet–jet interactions. Furthermore,
spatial uniformity is accompanied by rich dynamics of jet–jet interactions and
jet–sample interactions. Of the honeycomb-arranged seven CAP jets, the central
jet is strongest in the negative half cycle, whereas the six surrounding jets
(of uniform strength) are strongest in the positive half cycle. These dynamic
features offer possible insights with which to better control jet–jet interactions
and plasma–surface interactions in future.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
NIE, Q.Y.....et al., 2009. A two-dimensional cold atmospheric plasma jet array for uniform treatment of large-area surfaces for plasma medicine. New Journal of Physics, 11(115015), 14 pp.Publisher
© IOP Publishing Ltd and Deutsche Physikalische GesellschaftVersion
- VoR (Version of Record)
Publication date
2009Notes
This article was published in the journal, New Journal of Physics, [© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft] and is also available at: http://dx.doi.org/10.1088/1367-2630/11/11/115015ISSN
1367-2630Language
- en