Preferential functionalization on zigzag graphene nanoribbons: First-principles calculations

Details Preferential functionalization on zigzag graphene nanoribbons: First-principles calculations Preferential functionalization on zigzag graphene nanoribbons: First-principles calculations

2010-08-15

arxiv.org/abs/1008.2494v1

J. Phys.:Condens. Matter (Fast Track Communications) 22, 352205 (2010)

Physics

Condensed Matter

Materials Science

Scientific paper

We investigate the functionalization of functional groups to graphene nanoribbons with zigzag and armchair edges using first principles calculations. We find that the formation energy for the configuration of the functional groups functionalized to the zigzag edge is ~0.2 eV per functional group lower than that to the armchair edge. The formation energy difference arises from a structural deformation on the armchair edge by the functionalization whereas there is no structural deformation on the zigzag edge. Selective functionalization on the zigzag edge takes place at a condition of the temperature and the pressure of ~25 oC and 10-5 atm. Our findings show that the selective functionalization can offer the opportunity for an approach to the separation of zigzag graphene nanoribbons with their solubility change.

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