Abstract
The goal of plasma induced healing is to obtain a high bacteria
killing rate without significant damage of the healthy cells.
For this task various cold atmospheric pressure plasma jets
(APPJ’s) have been developed over the years. In those APPJ’s
the plasma is created with an inert gas inside a ceramic or
glass tube between two electrodes. The effluent mixes outside
with the air-environment. APPJ’s differ usually in electrode
geometry (ring, needle), used gas-effluent (helium, argon) and
excitation frequency (DC, kHz, MHz). These differences in
input parameters are also changing the plasma parameters,
such as the gas temperature, UV-emission and production of
reactive species, which makes a direct comparison of the
plasma jets challenging and contributes to the large
discrepancies between biomedical experiments of different
groups using (slightly) different plasma jets1.
Additionally the plasma is also strongly influenced by the
sample which is treated, due to the change in conductivity and
capacitance which adds to the complexity. We investigate
therefore also the plasmas in contact with saline solutions,
which are representative for a wound.
In this contribution we use one plasma jet, a plasma needle
and operate it with helium and argon with mixtures of air and
three different excitation modes, namely nanosecond pulsed
DC, kHz pulsed radio-frequency and continuous radiofrequency.
We investigate the difference of power dissipation
of the plasma and spatial resolved gas temperature for the
different conditions. Furthermore we investigate the
dependence of these parameters when in contact with metal,
ceramic and saline solution. For the pulse excited plasmas
nanosecond time resolved images have been obtained to gain
more insight on the morphology of those discharges when in
contact with a saline solution. Preliminary results on cell and
bacteria-treatment with the different plasmas are also
discussed.
1. J. Ehlbeck et al., "Low temperature atmospheric pressure plasma
sources for microbial decontamination," J. Phys. D: Appl. Phys., vol.
44, no. 1, p. 013002, Jan. 2011.
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* This work is part of the research program of the Foundation for
Fundamental Research
Original language | English |
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Title of host publication | Presentation at the 39th IEEE International Conference on Plasma (ICOPS 2012), 8-12 July 2012, Edinburgh, Scotland |
Publication status | Published - 2012 |
Event | 39th IEEE International Conference on Plasma Science (ICOPS 2012), July 8-12, 2012, Edinburgh, Scotland, UK - Edinburgh, Scotland, United Kingdom Duration: 8 Jul 2012 → 12 Jul 2012 |
Conference
Conference | 39th IEEE International Conference on Plasma Science (ICOPS 2012), July 8-12, 2012, Edinburgh, Scotland, UK |
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Abbreviated title | ICOPS 2012 |
Country | United Kingdom |
City | Edinburgh, Scotland |
Period | 8/07/12 → 12/07/12 |