Figure 3: (a) A scheme showing the reconstruction of an 8N octagon into a pair of pentagons. (b) LDOS for the case of (8,0)/(14,0) junction with 8R octagon present and varying strengths of the bond between the two unsaturated nodes of the 8N octagon (hopping at this bond varies from top to bottom: 0, 0.2 , 0.5 , ).