... Fisica, Universita`di Roma, ‘Tor Vergata’,via della Ricerca Scientifica 1, 00133 Roma, Italy b CNR-INFM, Statistical Mechanics and < /b> Complexity, Rome, ItalycINFM-S3‘‘nanoStructures and < /b> bioSystems ... far in ord er toclarify the experimental evidences and < /b> investigate the po-tential applications of < /b> such nanoscale materials. In fact,the theoretical panorama is essentially based either onab-initio ... studied and < /b> several experiments have alreadycharacterized some of < /b> their structural and < /b> electronic < /b> prop-erties [2,6,10–13]. Recently, it has been possible to fabri-cate, for example, single-crystal...