Development of Oxygen Radical Sensor for Atmospheric Non-Equilibrium Microwave Discharge Plasma Jet
Development of Oxygen Radical Sensor for Atmospheric Non-Equilibrium Microwave Discharge Plasma Jet
复制标题
大气非平衡微波放电等离子体射流氧自由基传感器的研制
DOI：
10.1109/tps.2022.3141189
复制
发表时间：
2022
影响因子：
1.5
通讯作者：
N. Mungkung and S. Fujii
中科院分区：
文献类型：
--
作者：
T. Yuji ;K. Nakabayashi;Y. Okamura;D. Hirotani;N. Mungkung and S. Fujii
目前，常压非平衡微波放电等离子体射流有望应用于种植体灭菌消毒设备。然而，由于大气压等离子体处于非平衡状态，没有建立简单的方法来测量等离子体的基本性质。我们以聚酯纤维为基材，亚甲基蓝为染料，成功研制了一种检测等离子体释放氧自由基的简易仪器——自由基传感器。当这个传感器检测到氧自由基时，自由基传感器的颜色从原来的蓝色变成白色。在这篇报告中，我们将解释在制造过程中的实验结果，以验证这种自由基传感器的行为。我们将自由基传感器的基础材料聚酯纤维和染料亚甲基蓝结合在一起，制成了自由基传感器的原型，并将其用于我们的实验中。自由基传感器的特点是当等离子体照射时，颜色从蓝色变为白色。为了阐明这种变色机理，我们用角度计测量了亲水性水平，并验证了氧自由基对基材的蚀刻作用。从这个结果中我们发现，随着用作等离子体气体的氧气流速的变化，亲水性发生了很大的变化，其变色机理是由于氧自由基的吸附作用。我们还利用x射线光电子能谱（XPS）对组分进行分析，进一步了解氧自由基的吸附效果，明确氧自由基占自由基传感器变色机理。
Presently, an atmospheric-pressure non-equilibrium microwave discharge plasma jet is expected to be applicable in the sterilization and disinfection equipment for dental implants. However, since the atmospheric-pressure plasma is in non-equilibrium state, there have been no simplified means established to measure basic properties of the plasma. We successfully developed a radical sensor, a simplified tool for detecting oxygen radicals released from plasma by using polyester fiber as base material, and methylene blue as dye. When this sensor detects an oxygen radical, the color of the radical sensor changes from blue, the original color, to white. In this report, we are going to explain the results of the experiments in the fabrication process to verify the behavior of this radical sensor. We combined polyester fiber, the base material of the radical sensor, and methylene blue, the dye, to prototype the radical sensor and used it in our experiments. The radical sensor features the mechanism in which the color changes from blue to white when plasma-irradiated. We used the angle meter to measure the hydrophilicity level and verified the etching effects of the oxygen radicals on the base material in order to clarify this discoloration mechanism. From this result, we found out that the hydrophilicity varied greatly as the flow rate of the oxygen gas used as plasma gas changed and that the color-changing mechanism was due to the adsorption effect of the oxygen radicals. We also used X-ray photoelectron spectroscopy (XPS) to analyze the components to further understand the adsorption effect of the oxygen radicals and clarified that the oxygen radicals accounted for the color-changing mechanism of the radical sensor.