A nitrogen microplasma jet operated at atmospheric pressure was developed for treating thermally sensitive materials. For example, the plasma sources in treatment of vulnerable biological materials must operate near the room temperature at the atmospheric pressure, without any risk of arcing or electrical shock. The microplasma jet device operated by an electrical power less than 10W exhibited a long plasma jet of about 6.5cm with temperature near 300K, not causing any harm to human skin. Optical emission measured at the wide range of 280–800nm indicated various reactive species produced by the plasma jet.
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Hong et al. (2006) studied this question.
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