%0 Journal Article
%T Tuning the van der Waals Interaction of Graphene with Molecules via Doping
%A Felix Huttmann
%A Antonio J. Mart¨ªnez-Galera
%A Vasile Caciuc
%A Nicolae Atodiresei
%A Stefan Schumacher
%A Sebastian Standop
%A Ikutaro Hamada
%A Tim O. Wehling
%A Stefan Bl¨¹gel
%A Thomas Michely
%J Physics
%D 2015
%I arXiv
%X We use scanning tunneling microscopy to visualize and thermal desorption spectroscopy to quantitatively measure that the binding of naphthalene molecules to graphene (Gr), a case of pure van der Waals (vdW) interaction, strengthens with $n$- and weakens with $p$-doping of Gr. Density functional theory calculations that include the vdW interaction in a seamless, ab initio way accurately reproduce the observed trend in binding energies. Based on a model calculation, we propose that the vdW interaction is modified by changing the spatial extent of Gr's $\pi$ orbitals via doping.
%U http://arxiv.org/abs/1509.02020v1