Seminars Archive

Fri 7 Jun, at 10:00 - Seminar Room T2

Characterization of electronic and structural properties of graphene/copper and graphene/nickel interfaces.

Luca Bignardi
Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands

Chemical Vapour Deposition (CVD) of graphene on metallic surfaces is one of the most promising methods for growing large and high-quality graphene flakes, which are an essential requirement for the development of carbon-based electronics. Moreover, the knowledge of the electronic properties of metal/graphene interfaces is vital for the development of graphene/contacts in devices. Nevertheless, despite the large research effort on graphene, many aspects of the electronic structure of these interfaces remain still unexplored. I shall present a comprehensive characterization of the properties of a CVD-grown graphene/copper interface achieved combining several surface science techniques, such as (angle-resolved) photoelectron spectroscopy and scanning tunneling microscopy, evidencing how the intermediate growth steps can affect the final product. Moreover, I shall report on the dynamics of photo-excited electronic states at the CVD-grown graphene/Ni(111) interface, investigated by means of time-resolved photoemission. The role of the nickel substrate in the electronic de-excitation process and in opening new scattering channels will be outlined.

(Referer: E. Cantori)
Last Updated on Tuesday, 24 April 2012 15:21