Plasma Pencil

Discussion in 'The Projects Forum' started by Boyindahood, Sep 11, 2011.

  1. Boyindahood

    Thread Starter New Member

    Sep 11, 2011
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    I am working on a science project for my science class in highschool. I have seen several articles on a 'plasma pencil' being used as a tool to kill bacteria. I saw this schematic for a cold plasma circuit http://jnaudin.free.fr/html/s_gdp1.htm. I was wondering how i could alter this so i could make the cold plasma come in contact with a petri dishes to see if it can kill different types of bacteria. Could i strip the insulated wire where the cold plasma is being made?

    Thanks-
    Grant
     
  2. vrainom

    Member

    Sep 8, 2011
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    19
    It seems that what kills the bacteria is the ionized gas mixture of the plasma pencil, so maybe it won't work without the gases.

    It does generate ozone though, would it be enough to kill bacteria? It's a very cool project.
     
  3. Boyindahood

    Thread Starter New Member

    Sep 11, 2011
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    After doing some quick research I have found several sources that say ozone can kill bacteria. Whether this is true or not though...does that schematic in the link I posted look like ozone is being produced?
     
  4. vrainom

    Member

    Sep 8, 2011
    109
    19
    Well every ionizer in free air produces ozone as far as I know, and in that page you linked there's a warning at the bottom for the ozone produced by the device, but I have no idea if it would serve your purposes.
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,765
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    I may be wrong, but I believe ozone is related to bleach, it is an oxidizer.
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,344
    Hello,

    Ozone is a very strong oxidizer:

    Due to the strongly oxidizing properties of ozone, ozone is a primary irritant, affecting especially the eyes and respiratory systems and can be hazardous at even low concentrations


    See this wiki page for more info:
    http://en.wikipedia.org/wiki/Ozone

    Bertus
     
  7. nucleargungus

    Member

    Apr 6, 2009
    23
    1
    Every electric arc produces ozone to some degree. Also electrolytic dissociation of water produces ozone... both are used in semiconductor fabs in which I used to work before they shipped ours to china.

    Robert

    "maybe that helps maybe it don't"
     
  8. Boyindahood

    Thread Starter New Member

    Sep 11, 2011
    3
    0
    Thanks for the help,
    one more thing though...
    Does the fact that their is insulation on the wire where the plasma is being made matter?
     
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