Fig. 2: Structural and electric properties.
From: Large area single crystal gold of single nanometer thickness for nanophotonics
a AFM image of a 2.1-nm-thick 2DGF. The black line shows the height profile of the edge of the 2DGF in the specified area. b Planar transmission electron microscopy (TEM) image of a 3.7-nm-thick 2DGF. Inset, enlarged view of the marked region. c Electron diffraction pattern of the region marked in (b). d Cross-sectional TEM image of a 2DGF. e Atomic-resolution TEM image of the region marked in (d). f Thickness-dependent sheet resistance of 2DGFs and sputtered gold films (the latter is conductive only for thicknesses larger than the percolation thickness of ~7 nm). The solid and dashed lines are exponential fits to the measured data points. Inset, optical micrograph of a Hall-bar structure fabricated with a 5.4-nm-thick 2DGF.
