Figure 5 | Scientific Reports

Figure 5

From: Single-step fabrication and work function engineering of Langmuir-Blodgett assembled few-layer graphene films with Li and Au salts

Figure 5

(a) AFM topography, (b) CPD map measured by KPFM, and (c) histogram of (b) shown for H(AuCl4) doped LPE GS film as an example. (d) Change in WF for doped LPE GS films for different dopants, in comparison to the undoped LPE GS film. Solid red line in (d) is only a guide for the eye. (e) Schematic representation of the work functions prior to the interaction (equal vacuum levels) for Au-based salt/graphene and Li-based salt/graphene. The green arrows indicate direction of electron flow showing that in the case of Li (Au) based salts, electrons are transferred to (from) graphene.

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