Figure 4
From: Elementary Process for CVD Graphene on Cu(110): Size-selective Carbon Clusters
STM images showing the jointed domains and low temperature thermal cycling induced decoupling of graphene from Cu(110) substrate.
(a) Large scale STM image (Vtip = 1 V, 100 × 100 nm2) showing one graphene flake jointed by different domains, which was formed by low temperature thermal cycling and subsequent annealing of the carbon clusters on Cu(110) up to 720°C. (b) The corresponding high resolution STM image (Vtip = 0.04 V, 20 × 20 nm2) showing the domain boundary. (c) The atomically resolved STM image (Vtip = 0.03 V, 5 × 5 nm2) illustrating two distinct graphene orientations, the upper domain is orientated at an angle of 30° relative to the lower domain. (d) Large scale STM image (Vtip = 1.0 V, 250 × 250 nm2) of Cu(110) covered by large flakes of graphene and carbon clusters. (e) A continuous single layer of graphene with different contrast (Vtip = 0.05 V, 15 × 15 nm2). (f) (Vtip = −0.01 V, 5 × 5 nm2) The corresponding high resolution STM images of panel (e), where the orientation of graphene is indicated by the red arrows.
