Towards a better understanding of the geometrical and orientational aspects of the electronic structure of halogens (F-I) adsorption on graphene

- Examines the orientation (zigzag, armchair) effects of F/Cl/Br/I-adsorbed graphene.
- F cases are site-dependent, while Cl/Br/I cases have minimal orientation dependence.
- F is adsorbed to graphene at about three times stronger than Cl/Br/I.
- To prompt re-examination of elemental-graphene systems to account for orientation.