Detection of solvated electrons below interface between atmospheric-pressure plasma and water by laser-induced desolvation
Detection of solvated electrons below interface between atmospheric-pressure plasma and water by laser-induced desolvation
复制标题
通过激光诱导去溶剂化检测大气压等离子体和水之间界面下方的溶剂化电子
DOI：
10.1088/1361-6595/ac4f08
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Y. Inagaki and K. Sasaki
中科院分区：
文献类型：
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作者：
下田麻里子;Y. Inagaki and K. Sasaki
我们开发了一种新方法来检测等离子体-水界面处的溶剂化（水合）电子。该方法基于激光诱导去溶剂化，然后将自由电子释放到等离子体中。在实验中，我们采用了大气压直流辉光放电，其中水面作为阴极。当用脉冲激光束照射水阴极正下方的区域时，我们观察到放电电流的脉冲增加。放电电流的增加是由激光诱导去溶剂化从水合电子产生的自由电子的释放引起的。放电电流的脉冲增加对激光波长敏感。我们使用蒙特卡罗模拟水中自由电子的传输，将脉冲增加与激光波长之间的关系与水合电子的溶剂化能的分布进行了比较。结果得出结论，在实验条件下产生的水合电子位于距等离子体-水界面7-15 nm的位置。
We have developed a new method to detect solvated (hydrated) electrons at the plasma–water interface. The method is based on laser-induced desolvation followed by the release of free electrons into the plasma. We employed an atmospheric-pressure dc glow discharge, in which the water surface worked as the cathode, in the experiment. When the region just below the water cathode was irradiated with a pulsed laser beam, we observed the pulsed increase in the discharge current. The increase in the discharge current was caused by the release of free electrons, which were produced from hydrated electrons by the laser-induced desolvation. The pulsed increase in the discharge current was sensitive to the laser wavelength. We compared the relationship between the pulsed increase and the laser wavelength with the distribution of the solvation energy of hydrated electrons using Monte Carlo simulation on the transport of free electrons in water. As a result, it was concluded that hydrated electrons produced under the experimental conditions were located at a distance of 7–15 nm from the plasma–water interface.