Thermal stability studies of CVD-grown graphene nanoribbons: Defect annealing and loop formation

Campos-Delgado, Jessica; Kim, Yoong Ahm; Hayashi, T.; Morelos-Gómez, Aarón; Hofmann, Mario; Muramatsu, Hiroyuki; Endo, Morinobu; Terrones, Humberto; Shull, Robert D.; Dresselhaus, M. S.; Terrones, Mauricio

doi:10.1016/j.cplett.2008.12.082

Cited by 174 publications

(134 citation statements)

References 25 publications

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“…9. 97) Pumera et al have also demonstrated that electrochemical decorations of graphene nanoplatelets involving 2-3 nm thick highly graphitized sharp knife-edges, 98) indicating that deposition with Pd catalyst nanoparticles is preferred at the nucleation vacancy sites at the edges of the intact graphene islands (Fig. 10).…”

Section: Edge Defectsmentioning

confidence: 99%

Nature of Graphene Edges: A Review

Açık

Chabal

2011

Jpn. J. Appl. Phys.

169

102

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Graphene edges determine the optical, magnetic, electrical, and electronic properties of graphene. In particular, termination, chemical functionalization and reconstruction of graphene edges leads to crucial changes in the properties of graphene, so control of the edges is critical to the development of applications in electronics, spintronics and optoelectronics. Up to date, significant advances in studying graphene edges have directed various smart ways of controlling the edge morphology. Though, it still remains as a major challenge since even minor deviations from the ideal shape of the edges significantly deteriorate the material properties. In this review, we discuss the fundamental edge configurations together with the role of various types of edge defects and their effects on graphene properties. Indeed, we highlight major demanding challenges to find the most suitable technique to characterize graphene edges for numerous device applications such as transistors, sensors, actuators, solar cells, light-emitting displays, and batteries in graphene technology.

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Section: Edge Defectsmentioning

confidence: 99%

Nature of Graphene Edges: A Review

Açık

Chabal

2011

Jpn. J. Appl. Phys.

169

102

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“…A common method for the bulk preparation of graphene powder is by synthesis and subsequent reduction of graphene oxide by thermal, or chemical methods. 6,7 Although promising, these methods use expensive and complex multistage procedures, the surface area is generally limited to below 1000 m 2 /g, and the resulting reduced graphene oxide (rGO) is fairly defective. Recently, solvothermal chemistry has been employed for synthesizing graphene, which has made it possible to produce large quantities with varying quality.…”

mentioning

confidence: 99%

Defective Graphene Foam: A Platinum Catalyst Support for PEMFCs

Liu

Daio

Sasaki

et al. 2014

J. Electrochem. Soc.

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Gram-scale synthesis of defective graphene foam from low-cost precursors is reported as a catalyst support material for platinum in fuel cell cathodes. The material was produced by combustion of sodium ethoxide, followed by washing and heat-treatment in various gases. The BET surface area is higher than 1500 m 2 /g. The defects in the material result in excellent distribution of platinum nanoparticles on the surface. The electrochemical performance is compared with platinum-decorated carbon black and commercially obtainable graphene using cyclic voltammetry, linear sweep voltammetry, and membrane electrode assemblies. Pt-decorated graphene foam has larger electrochemical surface area (101 m 2 /g) and higher mass activity (176 A/g Pt ). However, durability and fuel cell power density still require improvements. This graphene foam is a potentially useful catalyst support, especially for use in polymer electrolyte membrane fuel cells.

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“…Monolayer graphene (MG), constructed from a single layer of carbon atoms densely packed in a hexagonal lattice, was successfully produced by mechanical exfoliation [1,2] and chemical vapor deposition [3][4][5][6][7]. This particular material constitutes an excellent system for studying two-dimensional (2D) physical properties, e.g., quantum Hall effects [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The selection rule of graphene in a composite magnetic field

Ou¹,

Chiu²,

Yang³

et al. 2014

Opt. Express

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The generalized tight-binding model with exact diagonalization method is developed to calculate the optical properties of monolayer graphene in the presence of composite magnetic fields. The ratio of the uniform magnetic field and the modulated one accounts for a strong influence on the structure, number, intensity and frequency of absorption peaks, and thus the extra selection rules that are subsequently induced can be explained. When the modulated field increases, each symmetric peak, under a uniform magnetic field, splits into a pair of asymmetric peaks with lower intensities. The threshold absorption frequency exhibits an obvious evolution in terms of a redshift. These absorption peaks obey the same selection rule that is followed by Landau level transitions. Moreover, at a sufficiently strong modulation strength, the extra peaks in the absorption spectrum might arise from different selection rules. 201-204 (2005). 12. P. R. Wallace, "The Band Theory of Graphite," Phys. Rev. 71, 622 (1947). 13. M. I. Katsnelson, K. S. Novoselov, and A. K. Geim, "Chiral tunnelling and the Klein paradox in graphene," Nat.Phys B 28, 386-390 (1992

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Thermal stability studies of CVD-grown graphene nanoribbons: Defect annealing and loop formation

Cited by 174 publications

References 25 publications

Nature of Graphene Edges: A Review

Nature of Graphene Edges: A Review

Defective Graphene Foam: A Platinum Catalyst Support for PEMFCs

The selection rule of graphene in a composite magnetic field

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