Summarizing results on the performance of a selective set of atmospheric plasma jets for separation of photons and reactive particles

Summarizing results on the performance of a selective set of atmospheric plasma jets for separation of photons and reactive particles
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总结用于分离光子和反应粒子的一组选择性大气等离子体射流的性能结果

DOI:
10.1088/0022-3727/48/44/444001
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发表时间:
2015
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
J. Benedikt
J. Benedikt
中科院分区:
--
文献类型:
--
作者:
S. Schneider;F. Jarzina;J.-W. Lackmann;J. Golda;V. Layes;V. Schulz-von der Gathen;J. E. Bandow;J. Benedikt

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微尺度大气压等离子体射流是一种远程等离子体射流,其中等离子体产生的反应性粒子和光子参与衬底处理。在这里,我们总结了我们的努力,开发和表征的粒子或光子选择性的一套,否则相同的射流。以这种方式,活性物质或光子可以单独或组合使用,以研究它们的单独或组合效应,以测试这些效应是相加的还是协同的。介绍了三种射流的最终形式:粒子射流、光子射流和组合射流。这最后一组实现了光子和粒子通量的最高再现性,避免了湍流气流,并且所选等离子体发射组分的通量在所有射流的情况下几乎相同,而另一组分被有效地阻挡,这通过光学发射光谱和质谱法进行了验证。纹影成像和流体动力学模拟显示了气体流动的稳定性。这些选择性射流的性能与E的治疗的例子证明。大肠杆菌与单独He、He/N2和He/O2等离子体发射的不同组分进行比较。此外,真空紫外光子光谱的测量下至50 nm的波长可以与光子射流和不同的气体混合物之间的光谱强度的相对比较报告在这里。结果表明,真空紫外光子可导致大肠杆菌失活。大肠杆菌
A microscale atmospheric-pressure plasma jet is a remote plasma jet, where plasma-generated reactive particles and photons are involved in substrate treatment. Here, we summarize our efforts to develop and characterize a particle-or photon-selective set of otherwise identical jets. In that way, the reactive species or photons can be used separately or in combination to study their isolated or combined effects to test whether the effects are additive or synergistic. The final version of the set of three jets—particle-jet, photon-jet and combined jet—is introduced. This final set realizes the highest reproducibility of the photon and particle fluxes, avoids turbulent gas flow, and the fluxes of the selected plasma-emitted components are almost identical in the case of all jets, while the other component is effectively blocked, which was verified by optical emission spectroscopy and mass spectrometry. Schlieren-imaging and a fluid dynamics simulation show the stability of the gas flow. The performance of these selective jets is demonstrated with the example of the treatment of E. coli bacteria with the different components emitted by a He-only, a He/N 2 and a He/O 2 plasma. Additionally, measurements of the vacuum UV photon spectra down to the wavelength of 50 nm can be made with the photon-jet and the relative comparison of spectral intensities among different gas mixtures is reported here. The results will show that the vacuum UV photons can lead to the inactivation of the E. coli bacteria.
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