Atomically precise bottom-up fabrication of graphene nanostructures

2019 edition

María Tenorio

We grow atomically precise graphene nanostructures by bottom-up methods using halogenated – hydrocarbon building blocks. These building blocks involved in the reactions are designed in a way so that the final material, such as graphene nanoribbons [1] and nanoporous graphene [2], has a finely tuned width, edge, and doping, making it suitable for the implementation in transistors [2], as membranes for water desalination [3], gas filtering [4] and for the sequencing of the DNA [5].

The resulting graphene nanostructures are characterised by Scanning Tunnelling Microscope (STM) to study the topography with atomic  resolution, complemented with X-Ray Photoelectron Spectroscopy (XPS) to track the on-surface chemical reactions by its chemical composition. The fundamental electronic properties are characterised by Scanning Tunnelling Spectroscopy (STS).

[1] C. Moreno et al, Chem. Comm (2018)

[2] C. Moreno et al, Science (2018)

[3] D. Cohen-Tanugi et al., Nano Letters (2012)

[4] Jiang et al. NanoLett.(2009)

[5] Garaj, S. et al. Nature 467, 190–193 (2010).