The Graphene Future: Atomic Scale Engineering for Intelligent Materials Design

PhD defence, Friday 20 October 2017, Line Kyhl.

2017.10.20 | Trine Berndt Turtiainen Scheelke

Line Kyhl Hansen

Scanning tunneling microscopy image, with atomic resolution, of graphene on Ir(111) after the exposure to vibrationally excited H2. The exposure leads to a chemical modification of graphene that increases the graphene-metal interactions. Consequently, the graphene electronic properties are modified. The increased graphene-metal interaction leads to an increased protection of the metal surface towards oxidizing species.

Graphene is an atomically thin, pure carbon material with properties like, e.g., an extraordinary electronic conductivity and impermeability towards gases and liquids. Line has studied the chemical reactivity of graphene on metal surfaces, from the perspectives of applying graphene in nano-sized electronics and in metal-corrosion protection technology. When a metal supports graphene, however, the chemistry at the graphene-metal interface affects its properties. Line has gained an atomistic understanding of the interactions at the graphene-metal interface by using hydrogen as a tool to controllably increase or decrease the graphene-metal interactions.

The research has led to the controlled design of nano-scale graphene derivatives, with expected electronically conducting, semi-conducting and insulating properties. Additionally, the engineering of a graphene anti-corrosion coating for metals, with increased protective properties has been obtained.

The PhD degree was completed at the Interdisciplinary Nanoscience Center (iNANO), Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.

Time: Friday 20 October 2017, at 13:15
Place: 1593-012, iNANO Auditorium, iNANO, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C.
Title of dissertation: Tailoring interactions at the graphene-metal interface
Contact information: Line Kyhl, e-mail: linekyhl@inano.au.dk, tel.: +45 28894439
Members of the assessment committee:
Professor Thomas Michely, II. Physikalisches Institut, University of Cologne, Germany
Researcher Rosanna Larciprete, CNR-Institute for Complex Systems, Rome, Italy
Senior Researcher Morten Foss (chair), iNANO and Department of Physics and Astronomy, Aarhus University
Supervisor:
Associate Professor Liv Hornekær, iNANO and Department of Physics and Astronomy, Aarhus University
Language: The PhD dissertation will be defended in English

The defence is public.The dissertation is available for reading at the Graduate School of Science and Technology/GSST,Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

PhD defence
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Revised 23.10.2017