Research Activities
The research activity carried out in the IC11 laboratory, mainly concerns the synthesis, development and investigation of atomically ordered systems for the discovery of new synthetic materials at a nanoscopic scale, exhibiting outstanding physical properties, for electronic/opto-electronic, toxic-gases sensors, solar cells devices and field effect transistors. As a matter of fact, the predominant scientific interest is focused on two-dimensional (2D) layered materials and Nanostructures, with particular attention to elemental low-dimensional systems of group IV such as Si and C including all their 1D (Si nanoribbons), 2D (silicene, graphene and related multilayers) and 3D (porous C nanostructures graphite-like) forms, and group V, such as As, Sb and Bi. The presence of several Knudsen effusion cells, namely; Si, Ge, Mn, Ag, Au, As, Sb, Bi, Zn, Pb, Ni, Fe, in the UHV-MBE apparata allowing the access to epitaxial growths on given reconstructed substrates. Additionally, Ar+ ion sputtering, heating/cooling systems for samples preparation give the atomic control of surfaces, starting from the initial reconstruction toward the subsequent atomic surface modification. A gas-line for oxygen inlet allows experiments of surfaces or Metal/semiconductor, semiconductor/metal interfaces oxidation, fundamental in the exploitation of new nanostructures. By applying AES, AR-REELS, SES, LEED, RHEED and IPES surface science techniques of investigation available at the IC11 Laboratory, the physical properties connected to the synthetic atomic arrangements are studied, bearing in mind the objectives of obtaining novel outstanding nanostructures of groups IV and V in van der Waals elemental allotropes and multilayers. To accompany the above mentioned in-situ measurements for electronic and structural properties investigation, performed on the new obtained nanostructures, ex-situ macroscopic transport I-V characteristics are obtained at IC11 Laboratory, while the UPS/ARPES/XRD/STM/STS/SEM and TEM analysis are carried out in other National and/or foreign Laboratories. It is worth noting that the CNR-scientists in charge at IC11 Laboratory have several National (INFN, IIT and University Institutions) and International (Universities at France, Japan, Australia, Poland, China and US) scientific collaborations, worldwide spread, as well-attested by their scientific publications. Furthermore, their scientific expertise and activity is based on fundamental physics performed, by using synchrotron radiation of storage rings found in many Countries.
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