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. 2019 Jul 29;5:36. doi: 10.1038/s41378-019-0075-0

Fig. 2. Schematic drawing of the GO film formation and transfer process.

Fig. 2

a preparing a copper ring and GO solution; b forming a GO solution liquid film; c drying the GO film; d releasing the GO film from the copper ring; e transferring GO film to ethanol; f transferring the GO film to the device; g drying the GO film with nitrogen; h flattening and drying the GO film; i device with transferred GO film. j Detailed process of changing a GO solution liquid film to a dried GO film. k Sketch of the thickness distribution of the GO solution liquid film on the copper ring. l Optical image of a formed GO film