Further changing the substrate to Ag (111) (Figure. 11a), precise control of substrate temperature (250 °C) and Si flux resulted in the synthesis of single monolayer of silicene where Si atoms are arranged in a honeycomb lattice examined by STM (Figure. 11b) [150]. A height difference of 0.02 nm in line profile of the STM image gives the evidence of Si atoms being present in two different sub-lattices suggesting the possible formation of sp2-sp3hybridization. Peak-to-peak and valley-to-valley analysis measures the Si-Si atom distance to be 0.19±0.01 nmwhich is significantly lower than the bulk Si (0.235 nm). LEED analysis characterized the silicene monolayer consists of (2√3x2√3)R30° superstructure having long range periodicity(Figure. 11c) [150]. This discrepancy in the Si-Si distance from the silicene structure has been explained by the misinterpretation of pure Ag (111) surface [203].