Spatially resolving edge states of chiral graphene nanoribbons
Chenggang Tao,Chenggang Tao,Liying Jiao,Oleg V. Yazyev,Oleg V. Yazyev,Yen-Chia Chen,Yen-Chia Chen,Juanjuan Feng,Juanjuan Feng,Xiaowei Zhang,Xiaowei Zhang,Rodrigo B. Capaz,Rodrigo B. Capaz,James M. Tour,Alex Zettl,Alex Zettl,Steven G. Louie,Steven G. Louie,Hongjie Dai,Michael F. Crommie,Michael F. Crommie +20 more
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In this paper, a study using scanning tunnelling microscopy and spectroscopy reveals how chirality at the atomically well-defined edges of a graphene nanoribbon affects its electronic structure.Abstract:
Edge effects matter in graphene, particularly in nanoribbons. A study using scanning tunnelling microscopy and spectroscopy reveals how chirality at the atomically well-defined edges of a graphene nanoribbon affects its electronic structure.read more
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Edge Nonlinear Optics on a MoS2 Atomic Monolayer
TL;DR: In this paper, the translational symmetry breaking of a crystal at its surface may form two-dimensional (2D) electronic states, and a nonlinear optical imaging technique that allows rapid and all-optical determination of the crystal orientations of the 2D material at a large scale.
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The role of defects and doping in 2D graphene sheets and 1D nanoribbons
Humberto Terrones,Humberto Terrones,Ruitao Lv,Mauricio Terrones,Mauricio Terrones,Mildred S. Dresselhaus +5 more
TL;DR: It will be demonstrated that defects play a key role in graphene physicochemical properties and could even be critical to generate biocompatible materials.
Journal ArticleDOI
Shining carbon dots: Synthesis and biomedical and optoelectronic applications
TL;DR: In this paper, the authors reviewed the latest researches on the synthesis, structure, optical and electronic properties of CDs as well as their advanced applications in biomedicine and optoelectronics.
Journal ArticleDOI
Tuning the band gap of graphene nanoribbons synthesized from molecular precursors
Yen-Chia Chen,Dimas G. de Oteyza,Dimas G. de Oteyza,Zahra Pedramrazi,Chen Chen,Felix R. Fischer,Felix R. Fischer,Michael F. Crommie,Michael F. Crommie +8 more
TL;DR: A technique for modifying GNR band gaps via covalent self-assembly of a new species of molecular precursors that yields n = 13 armchair GNRs, a wider GNR than those previously synthesized using bottom-up molecular techniques is reported.
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Atomic-scale control of graphene magnetism by using hydrogen atoms
Héctor González-Herrero,José M. Gómez-Rodríguez,Pierre Mallet,Pierre Mallet,Mohamed Moaied,Mohamed Moaied,Juan Jose Palacios,Carlos Salgado,Miguel M. Ugeda,Jean-Yves Veuillen,Jean-Yves Veuillen,Felix Yndurain,Ivan Brihuega +12 more
TL;DR: Scanning tunneling microscopy experiments show that such a spin-polarized state is essentially localized on the carbon sublattice opposite to the one where the hydrogen atom is chemisorbed, drives the direct coupling between the magnetic moments at unusually long distances.
References
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Energy band-gap engineering of graphene nanoribbons.
TL;DR: It is found that the energy gap scales inversely with the ribbon width, thus demonstrating the ability to engineer the band gap of graphene nanostructures by lithographic processes.
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Chemically Derived, Ultrasmooth Graphene Nanoribbon Semiconductors
TL;DR: A chemical route to produce graphene nanoribbons with width below 10 nanometers was developed, as well as single ribbons with varying widths along their lengths or containing lattice-defined graphene junctions for potential molecular electronics.
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Energy Gaps in Graphene Nanoribbons
TL;DR: The authors' ab initio calculations show that the origin of energy gaps for GNRs with armchair shaped edges arises from both quantum confinement and the crucial effect of the edges, which differs from the results of simple tight-binding calculations or solutions of the Dirac's equation based on them.
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Edge state in graphene ribbons: Nanometer size effect and edge shape dependence.
TL;DR: It is found that a non-negligible edge state survives even in graphene ribbons with less developed zigzag edges, when the system size is on a nanometer scale.
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Half-metallic graphene nanoribbons
TL;DR: In this article, it was shown that if in-plane homogeneous electric fields are applied across the zigzag-shaped edges of the graphene nanoribbons, their magnetic properties can be controlled by the external electric fields.