Production of reactive species using vacuum ultraviolet photodissociation as a tool for studying their effects in plasma medicine: simulations and measurements
Production of reactive species using vacuum ultraviolet photodissociation as a tool for studying their effects in plasma medicine: simulations and measurements
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使用真空紫外光解生产活性物质作为研究其在等离子体医学中的作用的工具：模拟和测量
DOI：
10.1088/0022-3727/47/44/445203
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and S. Yonemori
中科院分区：
文献类型：
--
作者：
R. Ono;Y. Tokumitsu;S. Zen;and S. Yonemori
提出了一种利用H2 O和O2的真空紫外光解离产生OH、H、O、O3和O2（a1 Δ g）的方法，作为研究等离子体药物反应过程的工具。对于光解离，在石英管中流动的H2 O/He或O2/He混合物被Kr 2或Kr 2准分子灯照射。流出物可以施加到目标。模拟结果表明，在石英管喷嘴5 mm处，用H_2O_2灯法可在流出液中产生0.1 ~ 1 ppm的OH自由基。这与目前在等离子体医学中使用的氦大气压等离子体射流（He-APPJ）所产生的结果相当。H2 O2灯法也产生至多6ppm的H原子。相比之下，最大的O密度产生的O2和Kr 2灯的方法分别为0.15 ppm和2.5 ppm，这些都远远低于那些从He-APPJ（几十ppm）。两种灯法都可以产生浓度超过1000 ppm的臭氧和几十ppm的O2（a1 Δ g）。模拟的有效性进行了验证，通过测量的O3和OH的密度产生的O2灯的方法，使用紫外吸收和激光诱导荧光。O3和OH的测量密度与模拟密度之间的差异分别为20%和3-4倍。
We propose a method for producing OH, H, O, O 3, and O 2 (a 1 Δ g) using the vacuum ultraviolet photodissociation of H 2 O and O 2 as a tool for studying the reaction processes of plasma medicine. For photodissociation, an H 2 O/He or O 2/He mixture flowing in a quartz tube is irradiated by a Xe 2 or Kr 2 excimer lamp. The effluent can be applied to a target. Simulations show that the Xe 2 lamp method can produce OH radicals within 0.1–1 ppm in the effluent at 5 mm from a quartz tube nozzle. This is comparable to those produced by a helium atmospheric-pressure plasma jet (He-APPJ) currently used in plasma medicine. The Xe 2 lamp method also produces H atoms of, at most, 6 ppm. In contrast, the maximum O densities produced by the Xe 2 and Kr 2 lamp methods are 0.15 ppm and 2.5 ppm, respectively; these are much lower than those from He-APPJ (several tens of ppm). Both lamp methods can produce ozone at concentrations above 1000 ppm and O 2 (a 1 Δ g) at tens of ppm. The validity of the simulations is verified by measuring the O 3 and OH densities produced by the Xe 2 lamp method using ultraviolet absorption and laser-induced fluorescence. The differences between the measured and simulated densities for O 3 and OH are 20% and factors of 3–4, respectively.