Riccardo Gatti

Riccardo Gatti

Tel.: +1 (514) 228-6971
Fax: +1 (450) 929-8102
gatti@emt.inrs.ca

The self-assembly on surfaces is a potential driving force for the creation of bottom-up bidimensional (2D) nanostructures with features below the limit of typical lithographic top-down patterning techniques. Self-assembled molecular networks (SAMNs) exhibit appealing properties that can be tailored by properly tuning the features of the single molecules, as well as the interactions governing their self-assembly. For instance, SAMNs are typically stabilized by weak intermolecular forces such as van der Waals, hydrogen and halogen bonding. Furthermore, 2D polymerization of these systems could be a powerful method for the synthesis of robust organic nanostructures with conjugated bonds, which allow high charge-carrier mobility due to the presence of delocalized π-orbitals. In my research project I investigate SAMNs by means of scanning tunneling microscopy (STM), an extremely powerful characterization technique that allows to image features in the real space with sub-molecular resolution. In addition, density functional theory (DFT) calculations are also used for a better understanding of such systems. STM is a very versatile tool able to operate either in ultra-high vacuum (UHV) or in ambient condition. In the specific, the investigation of organic 2D structures at the solution/solid interface is motivated in prospect of possible low-cost fabrication methods on the large scale, as opposed to systems in UHV. A deep understanding of the formation of such organized molecular layers is an essential step towards the future incorporation of these molecular materials into devices.

NFL publications


L. E. Dinca, F. De Marchi, J. M. MacLeod, J. Lipton-Duffin, R. Gatti, D. Ma, D. F. Perepichka, and F. Rosei. Pentacle on Ni(111): room-temperature molecular packing and temperature-activated conversion to graphene. Nanoscale, 7, 3263 (2015). (PDF).
R. Gatti, J. MacLeod, J. Lipton-Duffin, A. Moiseev, D. Perepichka, and F. Rosei. Substrate, Molecular Structure, and Solvent Effects in 2D Self- Assembly via Hydrogen and Halogen Bonding. Journal of Physical Chemistry C, 118, 25505−25516 (2014). (PDF).