SKM 2023 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 1: 2D Materials and their Heterostructures I: Graphene
DS 1.1: Vortrag
Montag, 27. März 2023, 09:30–09:45, SCH A 316
Atomistic and network models for graphene based macromaterials: role of intercalation, defects and dopants — •Florian Fuchs1,2 and Jörg Schuster1,2 — 1Fraunhofer Insitute for Electronic Nano Systems (ENAS), Chemnitz, Germany — 2Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, Chemnitz, Germany
The excellent properties of graphene can be utilized in macroscopic conductor materials if the individual flakes are decoupled from each other, for example by misalignment of the lattices or by intercalation. Such materials are promising candidates to replace metals for numerous electrical conductor applications [1].
We show the results of a network model [2,3] which relates the structural arrangement and the properties of the individual graphene flakes to the macroscopically observed electrical conductivity. By this model we assess the properties of the macromaterial as a function of relevant parameters such as flake size, packing density, the graphene flake conductivity, and the interlayer conductance.
On the flake-level, intercalation, doping, and defect healing control the conductivity of the graphene-based macromaterial. We performed density functional theory calculations of these processes. In our presentation we discuss the impact on the material quality by focussing on the in-plane and the out-of-plane conductivity.
[1] J. Schuster et al., Nano Express 1, 020035 (2020)
[2] J. Schuster et al., ACS Appl. Mater. Interfaces 10, 43008 (2018)
[3] J. Schuster et al., Comp. Mat. Science 161 , 364 (2019)