Research / 2019 / Article / Fig 3

Review Article

Engineering Epitaxial Silicene on Functional Substrates for Nanotechnology

Figure 3

Silicene on Ag(111). Silicene grown on thin film silver on mica substrate and then encapsulated with Al2O3 stabilizer (a); mica removal resulting in a thin (~300 nm) membrane (b); the “silicene sandwich” is flipped upside down (c) and placed onto a new supporting substrate like SiO2/Si++ (d); finally, source and drain electrodes are patterned on the native silver layer and residual silver is etched away (e). Electrical characterization of the silicene-based FETs made of monolayer (f) and multilayer (g) channels showing an ambipolar behavior at RT. (f) and (g) are adapted from references [19, 21].