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Date and Time: December 2, 2021 - 15.00 ONLINE
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home » surfaces and interfaces: nanofabrication, imaging & spectroscopy » hydrogen storage in graphene
1. Hydrogen Storage in Graphene: Contact person: Stefan Heun Valentina Tozzini We apply surface science techniques to investigate the interactions between hydrogen and graphene. The objective is to control hydrogen storage by curvature manipulation, structuring, and functionalization of graphene sheets. This is addressed by a multi-disciplinary experimental-theoretical approach, and taking into consideration all possible hydrogen-graphene interactions, from purely physical to purely chemical, via metal mediated intermediate cases.
Graphene on SiCwas shown capable of efficiently adsorbing Li by intercalation: STM topographical images taken after deposition of Li. The images suggest that Li-intercalation starts from the step edges of the substrate. S Fiori, Y Murata, SVeronesi, A Rossi, C Coletti, S Heun, Li-intercalated graphene on SiC(0001): an STM study, Phys. Rev. B , 96, 125429 (2017)
Graphene monolayer on SiC(0001) with different corrugation patterns color-coded according to height obtained with DFT simulations of the monolayer model system including the full symmetry of moiré pattern and 4 layers of substrate.The natural corrugation of graphene grown on SiCcan be exploited to enhance one or more of the mentioned features. The moiré pattern of corrugation is multi-stable and can be manipulated by changing environmental conditions.T Cavallucci, V Tozzini, Multistable rippling of graphene on SiC: adensity functional theory study, J PhysChem C, 120, 7670-7677 (2016)