Role of Intermolecular Interactions on the Electronic and Geometric Structure of a Large π-Conjugated Molecule Adsorbed on a Metal Surface
Abstract
The organic semiconductor molecule 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) exhibits two adsorption states on the Ag(111) surface: one in a metastable disordered phase, prepared at low temperatures, the other in the long-range ordered monolayer phase obtained at room temperature. Notably, the two states differ substantial in their vertical bonding distances, intramolecular distortions, and electronic structures. The difference is explained by intermolecular interactions, which are particularly relevant for the long-range ordered phase, and which hence require attention.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2008
- DOI:
- 10.1103/PhysRevLett.100.136103
- Bibcode:
- 2008PhRvL.100m6103K
- Keywords:
-
- 68.43.Fg;
- 68.37.Ef;
- 68.43.-h;
- 79.60.Dp;
- Adsorbate structure;
- Scanning tunneling microscopy;
- Chemisorption/physisorption: adsorbates on surfaces;
- Adsorbed layers and thin films