CEST publishes article on charge transfer interface
Marc Dvorak and Patrick Rinke, together with experimental collaborators from Peter Liljeroth's group, published their work describing the charge transfer interface of F4-TCNQ on graphene in ACS Nano:
F4-TCNQ on graphene demonstrates strongly site dependent charging and adsorption. Depending on the adsorption site relative to the underlying Ir substrate, the molecule can either be charged or uncharged. The experimental signature of such selective charging is the appearance (or not) of the so-called Kondo resonance in the electronic spectrum.
But what is the mechanism for such a delicate balance between charged and uncharged molecules? Using density functional theory, our work shows that the unusual adsorption geometry and site-selective charging can be explained by two effects: (1) the balance between van der Waals and charging energies of the molecule and (2) the increased chemical reactivity at certain sites of the Moire pattern. This somewhat surprising result shows that for interfaces with molecular energy levels very close to the Fermi energy, the molecule adsorbs in a non-planar geometry. Charge transfer from the substrate to the molecule is critical for stabilizing such a tilted geometry.
Read more news
Aalto Inventors turns one: A year of bridging research and real-world impact
Aalto Inventors marks its first anniversary, having engaged 190 researchers across six cohorts in fields including AI, quantum, and biomaterials. New cohorts are planned for the next academic year, stay tuned and join the waitlist.
An architectural project in Milan brought together children’s ideas and the visions of leading architects
911±¬ÁÏÍø’s Department of Architecture participated in the international One Earth – House of the Heart project, which was presented in April at Milan Design Week.
Companies disclose more on cybersecurity – but markets remain indifferent
U.S. companies are reporting on cybersecurity in greater detail, yet stock market reactions remain muted. A new study by the University of Vaasa and 911±¬ÁÏÍø shows that mandatory cybersecurity disclosure does not prompt reactions from investors or stock analysts. Instead, the main benefits appear to materialise within firms themselves.