Electrochemical Bubbling Transfer of Graphene Using a Polymer Support with Encapsulated Air Gap as Permeation Stopping Layer

Figure 2

Images of typical graphene transferred to ~300 nm SiO₂ on Si. (a) is an ordinary photograph showing ~1 cm × 1 cm graphene. (b) and (c) are optical microscopy images for graphene transferred by (b) air-gap-assisted and (c) air-gap-free techniques. The arrows indicate the pores and ripples. (d–f) are SEM images, where (d) is taken at the graphene edge. (e) and (f) are taken at low and high magnifications, respectively. The scale bars in (d–f) are 100 μm, 50 μm, and 300 nm, respectively.