Publications by authors named "Rikke Plougmann"
Article Synopsis
- Transition metal dichalcogenides (TMDCs) are important materials for applications in optoelectronics and photovoltaics, with their properties varying based on the number of atomic layers.
- The study examines how different methods, including photoluminescence and various atomic force microscopy (AFM) techniques, can lead to significant differences in measuring the heights of exfoliated MoS2 flakes on silicon dioxide (SiO2).
- It emphasizes that electrostatic forces can complicate AFM height measurements of MoS2, which can result in misleading data about the material’s structure.
The electronic structure of a molecular quantum ring (stacks of 40-unit cyclic porphyrin polymers) is characterized via scanning tunneling microscopy and scanning tunneling spectroscopy. Our measurements access the energetic and spatial distribution of the electronic states and, utilizing a combination of density functional theory and tight-binding calculations, we interpret the experimentally obtained electronic structure in terms of coherent quantum states confined around the circumference of the π-conjugated macrocycle. These findings demonstrate that large (53 nm circumference) cyclic porphyrin polymers have the potential to act as molecular quantum rings.
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