Abstract
Silicon nanosheet, which has the two-dimensional silicon backbone structure, is one of the most interest nanomaterials because of their nanoscale thickness and macroscale area. Here we report the soft synthesis of two-dimension silicon nanosheet terminated with phenyl groups. From the photoluminescence measurement, the band gap of the silicon nanosheet is determined about 3.0 eV, which is agreement with the theoretical direct band gap for Si6H6. It means that the silicon nanosheet indicate the nature of a monolayer sheet, reflecting completely fabrication of silicon monolayer sheet in organic solvents. The Atomic Force Microscopy (AFM) afforded strongly evidence of phenyl-capped silicon monolayer sheet. The thickness of the silicon nanosheet was measured at intervals between the sheets and the substrate surface, and yielded an average value of 1.67 nm. Furthermore, the observation of an atomically resolved AFM image of an individual sheet was succeeded, indicating that the sheet maintained the two-dimensional Si(111) backbone.
