Figure 2
From: Origin of multiple band gap values in single width nanoribbons
Energy band gap values as a function of width corresponding to configurations I and II of ZGNRs.
Solid curves shows fitting to the band gap values using scaling formula 
for GNRs, where ΔE is the band gap (eV), α (eV.Å) is the scaling factor, and w + w ′(Å) is the equivalent width of nanoribbons. Dotted vertical lines are drawn to represent two band gap values for ZGNRs of the same width. Inset figure shows the difference of the ground state energy values for config. I and config. II as a function of width for ZGNRs.
