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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Separation of VUV/UV photons and reactive particles in the effluent of a He/O_2 atmospheric pressure plasma jet
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Separation of VUV/UV photons and reactive particles in the effluent of a He/O_2 atmospheric pressure plasma jet

机译：He / O_2大气压等离子体射流流出物中VUV / UV光子和反应性颗粒的分离

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摘要

Cold atmospheric pressure plasmas can be used for treatment of living tissues or for inactivation of bacteria or biological macromolecules. The treatment is usually characterized by a combined effect of UV and VUV radiation, reactive species and ions. This combination is usually beneficial for the effectiveness of the treatment but it makes the study of fundamental interaction mechanisms very difficult. Here we report on an effective separation of VUV/UV photons and heavy reactive species in the effluent of a microscale atmospheric pressure plasma jet (μ-APPJ). The separation is realized by an additional flow of helium gas under well-defined flow conditions, which deflects heavy particles in the effluent without affecting the VUV and UV photons. Both components of the effluent, the photons and the reactive species, can be used separately or in combination for sample treatment. The results of treatment of a model plasma polymer film and vegetative Bacillus subtilis and Escherichia coli cells are shown and discussed. A simple model of the He gas flow and reaction kinetics of oxygen atoms in the gas phase and at the surface is used to provide a better understanding of the processes in the plasma effluent. The new jet modification, called X-Jet for its appearance, will simplify the investigation of interaction mechanisms of atmospheric pressure plasmas with biological samples
机译：冷的大气压等离子体可用于治疗活组织或灭活细菌或生物大分子。该处理通常以紫外线和VUV辐射，反应性物种和离子的组合效应为特征。这种组合通常对于治疗的有效性是有益的，但是这使得基本相互作用机制的研究非常困难。在这里，我们报告了在大气压大气压等离子体射流（μ-APPJ）的流出物中VUV / UV光子和重反应物种的有效分离。分离是通过在定义明确的流动条件下增加氦气的流量来实现的，该气流可以使流出物中的重颗粒偏转而不影响VUV和UV光子。流出物的两种成分，光子和反应物种，都可以单独使用或组合使用进行样品处理。显示并讨论了模型血浆聚合物膜和营养型枯草芽孢杆菌和大肠杆菌细胞的处理结果。使用He气流和气相中以及表面氧原子的反应动力学的简单模型可以更好地了解等离子体流出物中的过程。新的喷气式飞机的外观被称为X-Jet，它将简化对大气压力等离子体与生物样品相互作用机理的研究。

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