Quantitative analysis of the electronic decoupling of an organic semiconductor molecule at a metal interface by a monolayer of hexagonal boron nitride3

Autor: Brülke, Christine, Heepenstrick, Timo, Sokolowski, Moritz, Krieger, Ina, Wolff, Beatrice, Yang, Xiaosheng, Shamsaddinlou, Ali, Weiß, Simon, Bocquet, François C., Tautz, Frank Stefan, Soubatch, Serguei
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Physical review / B 99(12), 121404 (2019). doi:10.1103/PhysRevB.99.121404
DOI: 10.1103/PhysRevB.99.121404
Popis: The adsorption geometry, the electronic properties, and the adsorption energy of the prototype organic molecule 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) on a monolayer of hexagonal boron nitride (hBN) grown on the Cu(111) surface were determined experimentally. The perylene core is at a large height of 3.37 Å and only a minute downward displacement of the functional anhydride groups (0.07 Å) occurs, yielding adsorption heights that agree with the sum of the involved van der Waals radii. Thus, already a single hBN layer leads to a decoupled (physisorbed) molecule, contrary to the situation on the bare Cu(111) surface.
Databáze: OpenAIRE