Interaction with the substrate plays an essential role in determining the structure and electronic property of graphene supported by a surface.We observe a maze-like reconstruction pattern in graphene on flat copper f...Interaction with the substrate plays an essential role in determining the structure and electronic property of graphene supported by a surface.We observe a maze-like reconstruction pattern in graphene on flat copper foil.With functionalized scanning tunneling microscope tips,a triangular three-for-six structure of graphene and a mixed(2√2×√2)R45°reconstruction of a Cu(100)surface are separately visualized at the atomic scale.Substrate-induced changes in the structure and electronic property are further illustrated by micro-Raman spectroscopy and scanning tunneling spectroscopy.This finding suggests a new method to effectively induce partial sp3 hybridization in a single-layer graphene and therefore to tune its electronic property through interaction with the substrate.展开更多
The adsorption and diffusion behaviors of benzene molecules on an Au(111) surface are investigated by lowtemperature scanning tunneling microscopy.A herringbone surface reconstruction of the Au(111) surface is imaged ...The adsorption and diffusion behaviors of benzene molecules on an Au(111) surface are investigated by lowtemperature scanning tunneling microscopy.A herringbone surface reconstruction of the Au(111) surface is imaged with atomic resolution,and significantly different behaviors are observed for benzene molecules adsorbed on step edges and terraces.The electric field induced modification in the molecular diffusion potential is revealed with a 2D molecular gas model,and a new method is developed to map the diffusion potential over the reconstructed Au(111) surface at the nanometer scale.展开更多
基金the National Natural Science Foundation of China under Grant Nos 11174347,61027011 and 10974245the National Basic Research Program of China under Grant No 2012CB933002+2 种基金the Chinese Academic of Sciences under Grant No 1731300500030the Robert a Welch Foundation(E-1728)the National Science Foundation(DMR-0907336,ECCS-1240510).
文摘Interaction with the substrate plays an essential role in determining the structure and electronic property of graphene supported by a surface.We observe a maze-like reconstruction pattern in graphene on flat copper foil.With functionalized scanning tunneling microscope tips,a triangular three-for-six structure of graphene and a mixed(2√2×√2)R45°reconstruction of a Cu(100)surface are separately visualized at the atomic scale.Substrate-induced changes in the structure and electronic property are further illustrated by micro-Raman spectroscopy and scanning tunneling spectroscopy.This finding suggests a new method to effectively induce partial sp3 hybridization in a single-layer graphene and therefore to tune its electronic property through interaction with the substrate.
基金Supported by the National Basic Research Program of China under Grant No 2012CB933002the National Natural Science Foundation of China under Grant No 11174347.
文摘The adsorption and diffusion behaviors of benzene molecules on an Au(111) surface are investigated by lowtemperature scanning tunneling microscopy.A herringbone surface reconstruction of the Au(111) surface is imaged with atomic resolution,and significantly different behaviors are observed for benzene molecules adsorbed on step edges and terraces.The electric field induced modification in the molecular diffusion potential is revealed with a 2D molecular gas model,and a new method is developed to map the diffusion potential over the reconstructed Au(111) surface at the nanometer scale.
