Figure 6.

Schematic depiction of the energetic contributions to the adsorption energy of the different adsorbates on Ag(100). (a) Three components of the total coadsorbed system: molecule, alkali atom (dark gray), and metal substrate, before and after coadsorption (below arrow). (b) Schematic representation of the adsorbate overlayer–substrate interaction and (c) intra-adsorbate interaction. Double-headed arrows indicate the interactions that are included in each contribution. The adsorbed molecules are shown with both ends twisted, as is found to be the case in K(TCNQ)₂.