Figure 2.

Mechanism of sliding transfer of graphene. a) The initial state in which the TS contacted with graphene/OS supported by the supporting substrate via a prepress process. b) The state of the integrated sample in a horizontal sliding process, in which the G–TS adhesion is basically matched with the G–OS adhesion marked by red unfilled arrows, and the red filled arrow indicates the OS–OS adhesion. Under a smaller horizontal sliding force, the G–TS contact area becomes much larger, and the OS layers are horizontally staggered. c) The state of the integrated sample under a larger vertical pulling force, in which the G–TS contact area becomes smaller. The red arrows represent the same meanings as those in (b). d) The comparison of horizontal sliding force and vertical pulling force for the transfer of graphene.