Tuning the electronic structure of nano-porous graphene

Anno
2021
Proponente Maria Grazia Betti - Professore Ordinario
Sottosettore ERC del proponente del progetto
PE3_4
Componenti gruppo di ricerca
Componente Categoria
Carlo Mariani Componenti strutturati del gruppo di ricerca
Francesco Trequattrini Componenti strutturati del gruppo di ricerca
Abstract

Graphene, the carbon-based honeycomb lattice structure confined in one-atom thickness, is one of the most promising two-dimensional (2D) materials for the extremely high charge carrier mobility and high saturation velocity. The most desirable application of graphene is utilizing its intriguing electronic properties serving for next generation nanoelectronic devices and sensors. Graphene gives rise to charge carrier behavior with extremely high Fermi velocity and the controllable tuning of electronic properties of graphene based on modifying its electronic structure becomes highly important. Till now a great effort has been dedicated to obtain a semiconducting response in graphene. On the other side, a fine tuning of the occupation of the electrons in the conduction band (metallicity) of graphene will affect the transport properties. A detailed understanding of this interaction is of great importance as it not only governs the electronic transport, and hence the performance of graphene-based electronic devices, but can also mediate exotic ground states, such as superconductivity and charge-density waves.

We propose to tune the metallicity of graphene by alkali metal doping of free standing 3D nanoporous graphene (NPG), constituted by single or bilayer graphene with very low defect density. The enhanced metallicity and the increased density of states at the Fermi level can influence not only the transport properties but can give interesting insights on the electron-phonon coupling as a function of electron density. The alkali-metal decorated graphene will also be used for enhanced hydrogen storage in the 3D matrix of 2D NPG. The increased electron density in the conduction band will be monitored by photoemission spectroscopy in our laboratory in Rome and by spectromicroscopy at synchrotron radiation facilities.

ERC
PE3_10
Keywords:
GRAFENE, NANOMATERIALI, TECNICHE SPETTROSCOPICHE E SPETTROMETRICHE, NANOTECNOLOGIE, FISICA DELLE SUPERFICI

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