Anomalous quenching of electronic states of nanographene on Pt(111) by deuterium edge termination
Abstract
The deuterium edge-termination effects on the electronic states of nanographene on Pt(111) have been investigated by three-photon photoemission and ultraviolet photoelectron spectroscopy. The antibonding σ* state at Γ¯ of nanographene with the average diameter of ~60 Å is found at 3.87+/-0.05 eV above the Fermi level. Although both the σ* state and the occupied π state at 8.1 eV show bulklike behavior, they are strongly affected by deuterium bonding to carbon atoms at the edges of nanographene. In particular, the σ* state is highly sensitive to the edge termination compared to the π state.
- Publication:
-
Physical Review B
- Pub Date:
- May 2002
- DOI:
- 10.1103/PhysRevB.65.241402
- Bibcode:
- 2002PhRvB..65x1402K
- Keywords:
-
- 73.22.-f;
- 73.20.-r;
- 79.20.Ds;
- 79.60.Dp;
- Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals;
- Electron states at surfaces and interfaces;
- Laser-beam impact phenomena;
- Adsorbed layers and thin films