New Design of a Sample Cell for Neutron Reflectometry in Liquid-Liquid Systems and Its Application for Studying Structures at Air-Liquid and Liquid-Liquid Interfaces
New Design of a Sample Cell for Neutron Reflectometry in Liquid-Liquid Systems and Its Application for Studying Structures at Air-Liquid and Liquid-Liquid Interfaces
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DOI：
10.3390/app12031215
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发表时间：
2022-02-01
影响因子：
2.7
通讯作者：
Narita, Hirokazu
中科院分区：
文献类型：
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作者：
Akutsu-Suyama, Kazuhiro;Yamada, Norifumi L.;Narita, Hirokazu
了解液-液体系的界面结构是必要的，特别是对于改善两相生物和化学反应。因此，我们开发了一种新的中子反射（NR）样品池，使我们能够观察界面周围的层结构，并研究了一种典型的表面活性剂十二烷基硫酸钠（SDS）在新的实验条件下对甲苯-d(8)-D2O界面的吸附行为。新电池的特点是在底部放置聚四氟乙烯框架，以产生光滑的界面，并且与传统电池相比缩小了尺寸。得到的NR曲线易于分析，并且我们确定了甲苯-d(8)-D2O和空气-D2O体系之间界面处SDS吸附层结构的细微差异。这可能是由于SDS分子的吸附行为取决于界面条件的不同。
Knowledge of interfacial structures in liquid-liquid systems is imperative, especially for improving two-phase biological and chemical reactions. Therefore, we developed a new sample cell for neutron reflectometry (NR), which enables us to observe the layer structure around the interface, and investigated the adsorption behavior of a typical surfactant, sodium dodecyl sulfate (SDS), on the toluene-d(8)-D2O interface under the new experimental conditions. The new cell was characterized by placing the PTFE frame at the bottom to produce a smooth interface and downsized compared to the conventional cell. The obtained NR profiles were readily analyzable and we determined a slight difference in the SDS adsorption layer structure at the interface between the toluene-d(8)-D2O and air-D2O systems. This could be owing to the difference in the adsorption behavior of the SDS molecules depending on the interfacial conditions.