Fig. 5: Electronic state characterization of 17- and 13-AGNRs.
From: Small bandgap in atomically precise 17-atom-wide armchair-edged graphene nanoribbons
a Differential conductance (dI/dV) point spectra recorded on edge of single 17-AGNR (red line) and Au(111) surface (black dotted line). Crosses in inset of STM image indicate tip positions for STS. Open-feedback setpoints were Vs = −1.1 V, It = 0.41 nA. b Constant-height dI/dV maps (It = 0.41 nA) of the 17-AGNR obtained at energies indicated in each map. Dashed lines indicate outer edges of the AGNR. c dI/dV spectra of single 13-AGNR on Au(111) recorded at tip positions marked with crosses in inset STM image (setpoints: Vs = 2.2 V, It = 0.8 nA). d dI/dV maps (It = 0.8 nA) of the 13-AGNR obtained at respective energies shown in each map. All STS data were obtained at 5 K. All scale bars, 2 nm.
