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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster I
CPP 15.41: Poster
Montag, 18. März 2024, 18:00–20:00, Poster C
Electrochemical potential study of the electric double layer in dynamic wetting of electrolyte drops — •Jamila Rzayeva1, Manuel Brinker1,2, and Patrick Huber1,2 — 1Institut für Material- und Röntgenphysik, Technische Universität Hamburg, Denickestraße 15, 21073 Hamburg, Deutschland — 2Deutsches Elektronen-Synchrotron DESY, Center for X-Ray and Nano Science CXNS, 22607 Hamburg, Deutschland
Our study aims to investigate the dynamic variations in electrochemical potential within the electric double layer (EDL) of electrolyte's drops. The behaviour of the EDL is investigated during drying and wetting at the interface of the liquid and a conductive gold surface. Understanding the EDL is paramount for fundamental electrochemical processes, especially in dynamic environments where electrolyte drop changes occur. In this work, besides spontaneous evaporation of the liquid, the drop is also deliberately altered by changing its volume. Here, vitally, the advancing and receeding contact angle impacts both the wetting and the potential. The experiments combine drop shape analyser measurements with open circuit potentiometry to yield a comprehensive picture of the link between electrochemistry and wetting of drops on a conductive surface. All of these measurements are conducted with different types of electrolyte and concentration, while also varying the relative humidity of the surrounding atmosphere.
Keywords: Electric double layer; drop wetting; conductive substrate; electrochemical potential