Quantum Hall effect in fractal graphene: growth and properties of graphlocons

Massicotte, Mathieu; Yu, Victor; Whiteway, Eric; Vatnik, Dan; Hilke, Michael

doi:10.1088/0957-4484/24/32/325601

Cited by 18 publications

(19 citation statements)

References 41 publications

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“…The flower-like (dendritic) shape 35 , with irregular and multifractal-like edges 35,89,90 , indicates a diffusionlimited growth mechanism. The more regular hexagonal grains 76 , whose edges are shown to be predominantly oriented along the zigzag directions of graphene lattice 76,91 , represent an edge-attachmentlimited growth 77 .…”

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confidence: 99%

Polycrystalline graphene and other two-dimensional materials

2014

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Graphene, a single atomic layer of graphitic carbon, has attracted intense attention due to its extraordinary properties that make it a suitable material for a wide range of technological applications. Large-area graphene films, which are necessary for industrial applications, are typically polycrystalline, that is, composed of single-crystalline grains of varying orientation joined by grain boundaries. Here, we present a review of the large body of research reported in the past few years on polycrystalline graphene. We discuss its growth and formation, the microscopic structure of grain boundaries and their relations to other types of topological defects such as dislocations. The review further covers electronic transport, optical and mechanical properties pertaining to the characterizations of grain boundaries, and applications of polycrystalline graphene. We also discuss research, still in its infancy, performed on other 2D materials such as transition metal dichalcogenides, and offer perspectives for future directions of research.Comment: review article; part of focus issue "Graphene applications

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confidence: 99%

Polycrystalline graphene and other two-dimensional materials

2014

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“…Therefore, to enhance electronic properties of graphene‐based devices, investigations on growth of single‐crystal graphene grains have been motivated. Recent advances in the CVD method have enabled the preparation of single‐crystal graphene grains with several shapes . Among those grains, hexagonal graphene has been the most extensively explored since it was observed on solid copper (Cu) foil .…”

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confidence: 99%

“…Among those grains, hexagonal graphene has been the most extensively explored since it was observed on solid copper (Cu) foil . Apart from that, triangular, rectangular, four‐lobed, and snow‐like graphene grains have been achieved, demonstrating the great potential in shaping graphene using CVD approach on metal substrates.…”

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confidence: 99%

Controlled Growth of Single‐Crystal Twelve‐Pointed Graphene Grains on a Liquid Cu Surface

et al. 2014

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The controlled fabrication of single-crystal twelve-pointed graphene grains is demonstrated for the first time by ambient pressure chemical vapor deposition on a liquid Cu surface. An edge-diffusion limited mechanism is proposed. The highly controllable growth of twelve-pointed graphene grains presents an intriguing case for the fundamental study of graphene growth and should exhibit wide applications in graphene-based electronics.

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“…A qualitative model was proposed, in which the final morphology of graphene was determined by the competition between carbon atoms diffusion along island edges and adatom surface diffusion. Meanwhile, another work showed that highly dendritic graphene crystals resemble snowflakes up to 0.25 mm in diameter that were synthesized inside a copper enclosure . Further characterizations demonstrated that the carbon surface diffusion was the growth‐limiting step and responsible for the formation of dendrites.…”

Section: Size and Morphology Engineering Of Graphene Single Crystalsmentioning

confidence: 99%

Graphene Single Crystals: Size and Morphology Engineering

2015

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Recently developed chemical vapor deposition (CVD) is considered as an effective way to large-area and high-quality graphene preparation due to its ultra-low cost, high controllability, and high scalability. However, CVD-grown graphene film is polycrystalline, and composed of numerous grains separated by grain boundaries, which are detrimental to graphene-based electronics. Intensive investigations have been inspired on the controlled growth of graphene single crystals with the absence of intrinsic defects. As the two most concerned parameters, the size and morphology serve critical roles in affecting properties and understanding the growth mechanism of graphene crystals. Therefore, a precise tuning of the size and morphology will be of great significance in scale-up graphene production and wide applications. Here, recent advances in the synthesis of graphene single crystals on both metals and dielectric substrates by the CVD method are discussed. The review mainly covers the size and morphology engineering of graphene single crystals. Furthermore, recent progress in the growth mechanism and device applications of graphene single crystals are presented. Finally, the opportunities and challenges are discussed.

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Quantum Hall effect in fractal graphene: growth and properties of graphlocons

Cited by 18 publications

References 41 publications

Polycrystalline graphene and other two-dimensional materials

Polycrystalline graphene and other two-dimensional materials

Controlled Growth of Single‐Crystal Twelve‐Pointed Graphene Grains on a Liquid Cu Surface

Graphene Single Crystals: Size and Morphology Engineering

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