Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) PBE + vdWsurf binding-energy curves of a PTCDA single-layer (black) and a PTCDA–CuPc double-layer (gray), adsorbing on Ag(111) as a function of the Ag(111)–PTCDA distance; dashed vertical lines indicate the experimental binding distances for PTCDA20 (black) and PTCDA–CuPc3 (gray) on Ag(111). (b) Binding-energy difference ΔEB of the two curves in part a with the respective PBE (red) and vdWsurf (cyan) energy contributions.
