Adsorption of BMP-TFSI in the monolayer structure causes hardly any changes in the density of states projected onto the atoms of BMP, TFSI and graphite (Figure , 3d and 3e), reflecting non-covalent interactions between BMP-TFSI and the graphite surface. As the anions adsorb at a larger distance from the surface than the cations in this monolayer, adsorbed BMP-TFSI leads to an increase of the surface dipole and thus to an increase of the work function by about 1.2 eV. an increase of their binding energy, as it had been mentioned for adsorbed ILs earlier. Similar effects are expected for the core level binding energies. Explicit calculations of core level binding energies will be presented later. Qualitatively, these values and trends in the calculated work function changes agree well with those in the experiment. Quantitatively, however, the calculated work function change due to the adsorption of the IL in the monolayer structure (1.2 eV) is about 1 eV larger than the experimentally determined value of 0.2 eV. This can at least partially be explained by temperature effects. As shown by an ab initio molecular dynamics simulation at 298 K (see Figure ), the row-like structure of the BMP-TFSI monolayer dissipates at that temperature.