A novel Rutherford backscattering spectrometry (RBS) method is presented to investigate the interface between a solid surface and a surrounding liquid. The introduced measurement system allows to observe and quantify adsorption at the solid–liquid interface and the formation of the electrochemical double layer (EDL). BaCl₂ as a bicomponent electrolyte and a Si₃N₄ membrane surface are chosen as a model system to prove the capabilities of the setup. The results of these RBS measurements are combined with electrochemical impedance spectroscopy (EIS) to validate the findings for the solid–liquid interface under study. Complementary results and discrepancies regarding the formation of the EDL are discussed.

中文翻译：

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固-液界面分析与原位卢瑟福反向散射和电化学阻抗谱

提出了一种新颖的卢瑟福背散射光谱法（RBS），以研究固体表面与周围液体之间的界面。引入的测量系统可以观察和量化固液界面处的吸附以及电化学双层（EDL）的形成。选择BaCl ₂作为双组分电解质和Si ₃ N ₄膜表面作为模型系统，以证明该装置的功能。这些RBS测量的结果与电化学阻抗谱（EIS）相结合，以验证所研究的固液界面的发现。讨论了有关EDL形成的补充结果和差异。