JOURNAL CLUB DO DEPARTAMENTO DE FÍSICA DOS MATERIAIS E MECÂNICA
Nesta semana a pós-graduanda Ana Maria Valencia Garcia, do Grupo Teórico Materiais, apresentará o artigo: “Tuning the van der Waals Interaction of Graphene with Molecules via Doping”
Dia: 20 de setembro, terça-feira, Sala de Seminários José Roberto Leite Ed. Alessandro Volta (bloco C) – Sala 110, IFUSP, às 12h10.
Abstract:
We use scanning tunneling microscopy to visualize and thermal desorption spectroscopy to quantitatively measure that the binding of naphthalene molecules to graphene, a case of pure van der Waals interaction, strengthens with n and weakens with p doping of graphene. Density-functional theory calculations that include the van derWaals interaction in a seamless, ab initio way accurately reproduce the observed trend in binding energies. Based on a model calculation, we propose that the van der Waals interaction is modified by changing the spatial extent of graphene’s π orbitals via doping.
Link: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.236101 DOI: 10.1103/PhysRevLett.115.236101 Phys. Rev. Lett. 115, 236101 – (2015)
