Figure 3
From: Tunable band gap in few-layer graphene by surface adsorption

Band structures of (a) K, (b) Al, (c) Cu, (d) Ag, (e) Au and (f) Pt-adsorbed ABC-stacked trilayer graphene with a coverage of θ = 1/4.
The red denotes the bands with weight projected on the metal outmost s valence band in (a–e) and on both the 5d and 6s bands in (f) and the blue denotes the bands with weight projected on the Al outmost 3p valence band. The Fermi level is set to zero.