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Keynote Speaker

Dr. Levente Tapasztó

HUN-REN Centre for Energy Research, Institute of Technical Physics and Materials Science, Hungary

2D MoS2-based hybrid materials: structural, electronic and catalytic
properties revealed by scanning probe microscopy
 

The absence of surface dangling bonds in two-dimensional crystals makes the controlled attachment of nanostructures, molecules or atoms particularly challenging. Conventional functionalization strategies often rely on extensive defect creation or harsh chemical treatments to provide anchoring sites; however, these approaches compromise the structural and electronic integrity of the host crystal. In this talk, I will present our recent efforts to develop synthesis strategies that enable the stable functionalization of 2D MoS₂ crystals while preserving their intrinsic properties. These approaches either exploit pre-existing defect sites or allow defect-free attachment of nanostructures and molecules on the MoS₂ surface. The resulting hybrid systems exhibit new structural and electronic features, giving rise to novel properties with potential relevance for catalysis and electronic applications. We employ a combination of scanning probe microscopy techniques, including atomic force microscopy (AFM) and scanning tunneling microscopy (STM), to characterize the atomic and electronic structure of these materials. In addition, scanning electrochemical cell microscopy (SECCM) is employed to map their catalytic activity with spatial resolution down to approximately 100 nm. Together, these techniques can provide a detailed nanoscale picture of how surface functionalization, local structure and electronic properties govern the catalytic behavior of MoS₂-based hybrid materials.

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