STM topograph of Eu-intercalated graphene (bright) and nonintercalated graphene (dark) on Ir(111) with naphthalene islands (outlined in blue) atop Eu-intercalated patches. Selected for an Editors’ Suggestion and a Synopsis in Physics.

From the article:

Tuning the van der Waals Interaction of Graphene with Molecules via Doping
Felix Huttmann, Antonio J. Martínez-Galera, Vasile Caciuc, Nicolae Atodiresei, Stefan Schumacher, Sebastian Standop, Ikutaro Hamada, Tim O. Wehling, Stefan Blügel, and Thomas Michely
Phys. Rev. Lett. 115, 236101 (2015)

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