Plasma, owing to its reactivity and nonequilibrium properties, is a unique field commonly used in material processing. In recent years, plasma processing with a liquid phase has attracted considerable attention owing to its important advantages, such as high electron density and the availability of a wide variety of reactions in solutions. However, plasma-in-liquid material synthesis is occasionally difficult to control and guidelines are lacking. In this study, we investigated whether the hard-soft acid–base (HSAB) principle, which is often applied in material synthesis, is applicable to the plasma-in-liquid process and demonstrated that organic solvent-derived substances produced by plasma-in-liquid processing reacted with solutes according to the HSAB principle. These results suggest that the HSAB principle may apply to plasma-in-liquid processing.

中文翻译：

---

软硬酸碱原理在液中等离子体处理中的应用

等离子体由于其反应性和非平衡特性，是材料加工中常用的独特领域。近年来，液相等离子体处理因其重要的优点（例如高电子密度和在溶液中可进行多种反应）而引起了相当大的关注。然而，液体等离子体材料的合成有时难以控制并且缺乏指导方针。在这项研究中，我们研究了材料合成中经常应用的硬软酸碱（HSAB）原理是否适用于液体等离子体过程，并证明了等离子体过程产生的有机溶剂衍生物质-根据 HSAB 原理与溶质反应的液体处理。这些结果表明 HSAB 原理可能适用于液体等离子体处理。