DFT calculation were carried using the CP2K package . PBE functional with Grimme D3 correction have been applied to study Cn adsorbed on Au(111) surface. The Kohn-Sham DFT has solved in the framework of the Gaussian and plane waves method . A plane-wave energy cut-off of 500 Ry and DZVP-MOLOPT-SR-GTH basis sets with Goedecker-Teter-Hutter (GTH) pseudopotentials were used to describe the surfaces and molecules. The Fermi-Dirac smearing has been employed to study the metallic system and the electronic temperature are set to 300K. The Au(111) surface is construct using a four-layer (6×6) slab which consists of 144 atoms. The geometry optimizations are carried out by keeping the two bottom layers fixed at the initial coordinates to maintain the bulk behavior. The projected density of states is calculated based on the optimized geometries.