Atmospheric pressure air-plasma jet evolved from microdischarges: Eradication of E. coli with the jet

Yong Cheol Hong; Won Seok Kang; Yoo Beom Hong; Won Ju Yi; Han Sup Uhm
December 2009
Physics of Plasmas;Dec2009, Vol. 16 Issue 12, p123502
Academic Journal
An atmospheric-pressure air-plasma jet operating at 60 Hz ac is presented. A plasma jet with a length of 23 mm was produced by feeding air through a porous alumina dielectric installed between an outer electrode and a hollow inner electrode. Microdischarges in the porous alumina are ejected as a plasma jet from the outer electrode through a 1 mm hole, showing that the temperature of the jet decreases to a value close to the room temperature. The jet disinfects E. coli cells very effectively, eradicating them with an exposure of a few seconds to the jet flame.


Related Articles

  • Electron energy recuperation in gyrodevices. Savilov, A. V.; Nusinovich, G. S.; Sinitsyn, O. V. // Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p073104 

    For many applications of gyrodevices, it is extremely important to increase their overall efficiency and reduce the power consumption. Therefore, at present, there are many gyrotrons operating with depressed collectors. These gyrotrons and their depressed collectors are typically designed with...

  • Magnetic helicity balance in the Sustained Spheromak Plasma Experiment. Stallard, B. W.; Hooper, E. B.; Woodruff, S.; Bulmer, R. H.; Hill, D. N.; McLean, H. S.; Wood, R. D. // Physics of Plasmas;Jul2003, Vol. 10 Issue 7, p2912 

    The magnetic helicity balance between the helicity input injected by a magnetized coaxial gun, the rate-of-change in plasma helicity content, and helicity dissipation in electrode sheaths and Ohmic losses have been examined in the Sustained Spheromak Plasma Experiment (SSPX) [E. B. Hooper, L. D....

  • Effect of Vacuum Chamber Boronization on the Plasma Parameters in the L-2M Stellarator. Meshcheryakov, A. I.; Akulina, D. K.; Batanov, G. M.; Berezhetskiı, M. S.; Voronov, G. S.; Gladkov, G. A.; Grebenshchikov, S. E.; Grinchuk, V. A.; Grishina, I. A.; Kolik, L. V.; Larionova, N. F.; Letunov, A. A.; Logvinenko, V. P.; Petrov, A. E.; Pshenichnikov, A. A.; Ryabenko, G. A.; Sarksyan, K. A.; Skvortsova, N. N.; Fedyanin, O. I.; Kharchev, N. K. // Plasma Physics Reports;Jun2005, Vol. 31 Issue 6, p452 

    After boronization of the vacuum chamber of the L-2M stellarator, radiative losses from ohmically and ECR heated plasmas were reduced by a factor of 3–4. Under these conditions, radiative losses in the ECRH regime comprise only 10–15% of the input microwave power. Some effects have...

  • One-dimensional semiempirical model of plasma in an accelerator with closed electron drifts. Gorshkov, O. A.; Shagayda, A. A. // Plasma Physics Reports;Jul2008, Vol. 34 Issue 7, p587 

    The plasma structure in an accelerator with closed electron drifts is investigated experimentally and numerically based on the measured data on the angular and energy ion distribution in a plasma jet. The mathematical model is constructed in a one-dimensional steady-state approximation and is...

  • Femtosecond Pump-Probe Diagnostics of Preformed Plasma Channels. Zgadzaj, R.; Gaul, E. W.; Matlis, N. H.; Shvets, G.; Debus, A.; Downer, M. C. // AIP Conference Proceedings;2004, Vol. 737 Issue 1, p736 

    We report on recent ultrafast pump-probe experiments28 in He plasma waveguides using 800 nm, 80 fs pump pulses of 0.2×1018 W/cm2 peak guided intensity, and single orthogonally-polarized 800 nm probe pulses with ∼0.1% of pump intensity. The main results are: (1) We observe...

  • Dissipative trapped-electron instability in quasihelically symmetric stellarators. Rafiq, T.; Hegna, C. C. // Physics of Plasmas;Jun2006, Vol. 13 Issue 6, p062501 

    The linear electrostatic dissipative trapped-electron mode is investigated in a quasihelically symmetric (QHS) stellarator and a configuration whose symmetry is spoiled by the addition of a mirror contribution to the magnetic spectrum. The effect of the trapped electrons is accounted for using...

  • Effects of relativistic frequency downshift on measurements of electron cyclotron emission in Large Helical Device plasma. Sato, M.; Isayama, A.; Inagaki, S.; Nagayama, Y.; Kawahata, K.; Iwama, N. // Review of Scientific Instruments;Oct2004 Part I & II, Vol. 75 Issue 10, p3819 

    The effects of relativistic down shift frequency on the determination of the electron temperature profile from electron cyclotron emission (ECE) in a large helical device(LHD) have been studied by a numerical calculation. since the value of toroidal magnetic field has maximum at the magnetic...

  • Diagnosing pure-electron plasmas with internal particle flux probes. Kremer, J. P.; Pedersen, T. Sunn; Marksteiner, Q.; Lefrancois, R. G.; Hahn, M. // Review of Scientific Instruments;Jan2007, Vol. 78 Issue 1, p013503 

    Techniques for measuring local plasma potential, density, and temperature of pure-electron plasmas using emissive and Langmuir probes are described. The plasma potential is measured as the least negative potential at which a hot tungsten filament emits electrons. Temperature is measured, as is...

  • Effects of electron cyclotron resonance heating (ECRH)-induced direct loss flux on neoclassical transport in a bumpy stellarator. JaeChun Seol; Hegna, C. C.; Callen, J. D. // Physics of Plasmas;Aug2007, Vol. 14 Issue 8, p082505 

    Energetic electron populations can substantially modify the neoclassical transport properties in stellarators. A model accounting for this change in transport is developed assuming the presence of electron cyclotron resonance heating (ECRH). The quasilinear diffusion coefficient for...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics