Nanostrukturierung mittels Rasterkraftmikroskopie und Elektrochemie (English shop)

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Christian Obermair’s dissertation investigates methods for the controlled fabrication of metallic nanostructures using atomic force microscopy and electrochemical processes. The research focuses on mechanical nanopatterning through friction-induced chemical reactions and localized electrochemical metal deposition. By modulating the contact force of an atomic force microscope tip, mica and gold surfaces can be structured with high spatial precision. The study also demonstrates controlled deposition and dissolution of copper, silver, and nickel nanostructures on gold substrates. Another major focus is the electrochemical fabrication of atomic silver point contacts and the investigation of their quantized electrical conductance. Statistical analyses reveal the influence of electronic and geometric shell effects on stable atomic contact configurations. Finally, an atomic-scale switch is demonstrated, allowing controlled changes in electrical conductance through an external electrochemical control electrode. The findings provide new approaches to nanofabrication and the development of quantum electronic devices.