Lunedì 29 settembre 2025 - Ore 14:30 - Aula 21
Dott. Filippo Giovanni Fabozzi - HechtLab, Department of Chemistry & Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Germany
  Seminario  

Surfaces and interfaces are all around us and represent critical zones of interactions where materials meet remarkable changes in physical, chemical, or biological properties, often leading to unique phenomena that are essential to both fundamental processes and advanced technological applications. Scanning Probe Microscopies, including Atomic Force Microscopy (AFM) and Scanning Tunneling Microscopy (STM) stand as primary tools for the visualization of phenomena on crystalline surfaces, thanks to their unprecedented lateral resolution. However, full understanding and control of such processes at the nanoscale remain one of the main challenges in surface science. In this context, the application of STM at the solid-liquid interface emerges not only as an imaging technique for unravelling 2D-nanoarchitectures at the molecular level, but also means to initiate and control chemical and physical processes confined in the second dimension on crystalline surfaces.1 We show how the importance of a rational molecular design influences the supramolecular organization of building blocks, facilitating the formation of a novel class of π-conjugated 2D-polymers known as vinylene-linked Covalent Organic Frameworks.2 Furthermore, we demonstrate how the applied electric field induced by the STM tip can be used to precisely control conformational changes in molecular 2D-crystals, leading to a full control at the nanoscale of molecular Moiré Patterns.3 Finally, a strategy by combining a rational self-assembly with light irradiation to achieve chemical control over photochemical reactions of non-symmetric stilbene derivatives will be briefly introduced. This interdisciplinary journey through the combination of chemistry and physics highlight the pivotal role of the STM in the understanding and manipulation of fundamental phenomena on surfaces, advancing the understanding of nanoscience as the basics of nanotechnology.