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Journal ArticleDOI

Large single crystals of graphene on melted copper using chemical vapour deposition

TLDR
In this article, a simple one-step method is presented for synthesizing large single crystal graphene domains on melted copper using atmospheric pressure chemical vapour deposition (CVD), achieved by performing the reaction above the melting point of copper (1090 °C) and using a molybdenum support to prevent the copper from dewetting.
Abstract
A simple one-step method is presented for synthesizing large single crystal graphene domains on melted copper using atmospheric pressure chemical vapour deposition (CVD). This is achieved by performing the reaction above the melting point of copper (1090 °C) and using a molybdenum support to prevent balling of the copper from dewetting. By controlling the amount of hydrogen during growth, individual single crystal domains of monolayer graphene greater than 200 µm are produced, determined by electron diffraction mapping. Angular resolved photoemission spectroscopy is used to show the graphene grown on copper exhibits a linear dispersion relationship and has no sign of doping.

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Citations
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Toward the synthesis of wafer-scale single-crystal graphene on copper foils.

TL;DR: This work should provide clear guidelines for the large-scale synthesis of wafer-scale single-crystal graphene, which is essential for the optimized graphene device fabrication.

Production and processing of graphene and related materials

Claudia Backes, +148 more
TL;DR: In this article, the authors present an overview of the main techniques for production and processing of graphene and related materials (GRMs), as well as the key characterization procedures, adopting a 'hands-on' approach, providing practical details and procedures as derived from literature and from the authors' experience, in order to enable the reader to reproduce the results.
Journal ArticleDOI

Spatial control of defect creation in graphene at the nanoscale

TL;DR: Control is shown over both the location and average complexity of defect formation in graphene by tailoring its exposure to a focussed electron beam and some of the created defects were stable, whereas others relaxed to simpler structures through bond rotations and surface adatom incorporation.
Journal ArticleDOI

Mechanisms of graphene growth by chemical vapour deposition on transition metals

TL;DR: In this paper, the fundamental mechanisms of the synthesis of graphene from various transition metals under various circumstances through a CVD process and concludes by addressing the challenges involved in large-scale graphene synthesis and the reuse of the catalysts.
Journal ArticleDOI

A Review of Carbon Nanomaterials' Synthesis via the Chemical Vapor Deposition (CVD) Method.

TL;DR: This review paper summarizes the synthesis of various carbon nanomaterials via the chemical vapor deposition (CVD) method, including fullerenes, carbon nanotubes (CNTs), carbon nanofibers (CNFs), graphene, carbide-derived carbon (CDC), carbon nano-onion (CNO) and MXenes.
References
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Journal ArticleDOI

Electric Field Effect in Atomically Thin Carbon Films

TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
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Raman spectrum of graphene and graphene layers.

TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
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Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils

TL;DR: It is shown that graphene grows in a self-limiting way on copper films as large-area sheets (one square centimeter) from methane through a chemical vapor deposition process, and graphene film transfer processes to arbitrary substrates showed electron mobilities as high as 4050 square centimeters per volt per second at room temperature.
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Grains and grain boundaries in single-layer graphene atomic patchwork quilts

TL;DR: This work determines the location and identity of every atom at a grain boundary and finds that different grains stitch together predominantly through pentagon–heptagon pairs, and reveals an unexpectedly small and intricate patchwork of grains connected by tilt boundaries.
Journal ArticleDOI

Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition

TL;DR: It is shown that grain boundaries give a significant Raman 'D' peak, impede electrical transport, and induce prominent weak localization indicative of intervalley scattering in graphene, opening a route towards scalable fabrication of single-crystal graphene devices without grain boundaries.
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