Browsing by Author "Kepaptsoglou, Demie"

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Electronic Structure Modification of Ion Implanted Graphene: The Spectroscopic Signatures of p- and n-Type Doping

Kepaptsoglou, Demie; Hardcastle, Trevor P.; Seabourne, Che R.; Bangert, Ursel; Zan, Recep; Amani, Julian Alexander; Ramasse, Quentin M. (AMER CHEMICAL SOC, 2015)

A combination of scanning transmission electron microscopy, electron energy loss spectroscopy, and ab initio calculations is used to describe the electronic structure modifications incurred by free-standing graphene through ...
Silicon-Carbon Bond Inversions Driven by 60-keV Electrons in Graphene

Susi, Toma; Kotakoski, Jani; Kepaptsoglou, Demie; Mangler, Clemens; Lovejoy, Tracy C.; Krivanek, Ondrej L.; Ramasse, Quentin (AMER PHYSICAL SOC, 2014)

We demonstrate that 60-keV electron irradiation drives the diffusion of threefold-coordinated Si dopants in graphene by one lattice site at a time. First principles simulations reveal that each step is caused by an electron ...