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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 29: Interfaces and Thin Films

CPP 29.1: Hauptvortrag

Mittwoch, 29. März 2023, 09:30–10:00, MER 02

Imaging mineral-water interfaces with atomic force microscopy — •Angelika Kühnle — Bielefeld University, Bielefeld, Germany

Mineral-water interfaces are omnipresent in nature and technology. Consequently, mineral-water interfaces play a decisive role in many fields, ranging from geochemistry, environmental science and biomineralization to catalysis and electrochemistry. A comprehensive understanding of the interaction of minerals with their surroundings requires the knowledge of the atomic surface structure including the hydration at the interface. In this respect, atomic force microscopy allows for gaining real-space, molecular-level information of the interfacial structure. In this presentation, silver iodide will be discussed as a prototypical example for an ice nucleating material. Silver iodide is a polar material, calling for a stabilization mechanism. So far, however, the stabilization mechanism is unknown. Our atomically resolved atomic force microscopy images reveal no indication for a surface reconstruction at the atomic scale, indicating that another mechanism seems to be at play.