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O: Fachverband Oberflächenphysik

O 4: Mini-Symposium: Free-standing functional molecular 2D materials I

O 4.1: Invited Talk

Monday, March 1, 2021, 10:30–11:00, R2

Ion permeation across atomically thin materials — •Marcelo Lozada-Hidalgo — Department of Physics and Astronomy, The University of Manchester

The basal plane of graphene is impermeable to all atoms and molecules - even for helium, the smallest - at ambient conditions. On this basis, it was believed that graphene would be impermeable even to protons, the nuclei of hydrogen atoms. Unexpectedly, we found that graphene is highly permeable to these ions at ambient conditions. Since these early experiments, our research has established that permeation through 2D crystals can be fundamentally different from that in bulk materials. Even basic notions like bulk 3D resistivity need to be considered carefully. Many fundamental questions remain open even for graphene, the most researched of theses crystals - and the vast majority of these materials remain unexplored from this perspective. This talk will provide an overview of this new field of research and discuss some of the recent developments involving new 2D materials.