Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 23: Graphene: Adsorption, Intercalation and Doping I (joint session O/TT)

TT 23.1: Vortrag

Montag, 12. März 2018, 15:00–15:15, MA 043

Intercalation of epitaxial graphene: possible mechanisms — •Mikolaj Lewandowski¹, Ewa Madej², Zygmunt Milosz¹, Dorota Wilgocka-Slezak², Michal Hermanowicz³, Nika Spiridis², Jozef Korecki², Stefan Jurga¹, and Feliks Stobiecki¹ — ¹NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland — ²Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland — ³Institute of Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznan, Poland

Intercalation of epitaxial graphene (EG) with atoms of various elements may modify EG’s structure and electronic properties, which is related both to the weakening of the graphene-support interaction, as well as the interaction of graphene with the intercalated material. We used scanning tunneling microscopy (STM), low energy electron microscopy (LEEM) and low energy electron diffraction (LEED) to study the mechanisms of intercalation of epitaxial graphene (EG) grown on Ru(0001) by thermal decomposition of ethylene (C₂H₄). The results revealed direct influence of graphene’s preparation method on its structure and the intercalation mechanisms. The experimental results were supported by theoretical ab initio calculations.

Acknowledgment: The work was financially supported by the National Science Centre of Poland (OPUS project No. 2014/15/B/ST3/02927).