作者: Pascal Ruffieux , Jinming Cai , Nicholas C. Plumb , Luc Patthey , Deborah Prezzi
DOI: 10.1021/NN3021376
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摘要: Some of the most intriguing properties graphene are predicted for specifically designed nanostructures such as nanoribbons. Functionalities far beyond those known from extended systems include electronic band gap variations related to quantum confinement and edge effects, well localized spin-polarized states specific geometries. The inability produce with needed precision, however, has so hampered verification properties. Here, we report on dispersion occupied bands atomically precise nanoribbons fabricated via on-surface synthesis. Angle-resolved photoelectron spectroscopy scanning tunneling data armchair width N = 7 supported Au(111) reveal a 2.3 eV, an effective mass 0.21 m0 at top valence band, energy-dependent charge carrier velocity reaching 8.2 × 105 m/s in li...