The authors present experimental evidence of silicene sheets (graphene-like structures) epitaxially grown on a close-packed silver surface (Ag(111)) using atomic resolved scanning tunneling microscopy (STM). The silicene sheets were synthesized by direct condensation of a silicon atomic flux onto a single-crystal Ag(111) substrate in ultra-high vacuum conditions. The resulting structure is highly ordered, forming a honeycomb lattice with two silicon sub-lattices at different heights (0.02 nm), indicating possible sp²-sp³ hybridizations. The Si-Si nearest-neighbour distance is found to be 0.19±0.01 nm, about 17% shorter than that in bulk silicon, suggesting a catalytic role of the Ag substrate. Low-energy electron diffraction (LEED) confirms the long-range order of the silicene film, while STM images show that the silicene film covers the surface steps like graphene grown on metals. The study provides insights into the growth mechanisms and stability of silicene, which could have potential applications in nanotechnology.The authors present experimental evidence of silicene sheets (graphene-like structures) epitaxially grown on a close-packed silver surface (Ag(111)) using atomic resolved scanning tunneling microscopy (STM). The silicene sheets were synthesized by direct condensation of a silicon atomic flux onto a single-crystal Ag(111) substrate in ultra-high vacuum conditions. The resulting structure is highly ordered, forming a honeycomb lattice with two silicon sub-lattices at different heights (0.02 nm), indicating possible sp²-sp³ hybridizations. The Si-Si nearest-neighbour distance is found to be 0.19±0.01 nm, about 17% shorter than that in bulk silicon, suggesting a catalytic role of the Ag substrate. Low-energy electron diffraction (LEED) confirms the long-range order of the silicene film, while STM images show that the silicene film covers the surface steps like graphene grown on metals. The study provides insights into the growth mechanisms and stability of silicene, which could have potential applications in nanotechnology.