Mesoscale Scanning Electron and Tunneling Microscopy Study of the Surface Morphology of Thermally Annealed Copper Foils for Graphene Growth

Sarajlic, Olesya; Mani, R. G.

doi:10.1021/cm400032h

Cited by 25 publications

(20 citation statements)

References 32 publications

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“…The etching (e.g. using Fe(NO 3 ) 3 ) also does not lead to satisfactory results, since etch quarries and residues are left on the surface, even after subsequent foil annealing [33].…”

Section: Resultsmentioning

confidence: 99%

Ultrasmooth metallic foils for growth of high quality graphene by chemical vapor deposition

et al. 2014

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Synthesis of graphene by chemical vapor deposition is a promising route for manufacturing large-scale high-quality graphene for electronic applications. The quality of the employed substrates plays a crucial role, since the surface roughness and defects alter the graphene growth and cause difficulties in the subsequent graphene transfer. Here, we report on ultrasmooth high-purity copper foils prepared by sputter deposition of Cu thin film on a SiO2/Si template, and the subsequent peeling off of the metallic layer from the template. The surface displays a low level of oxidation and contamination, and the roughness of the foil surface is generally defined by the template, and was below 0.6 nm even on a large scale. The roughness and grain size increase occurred during both the annealing of the foils, and catalytic growth of graphene from methane (≈1000 °C), but on the large scale still remained far below the roughness typical for commercial foils. The micro-Raman spectroscopy and transport measurements proved the high quality of graphene grown on such foils, and the room temperature mobility of the graphene grown on the template stripped foil was three times higher compared to that of one grown on the commercial copper foil. The presented high-quality copper foils are expected to provide large-area substrates for the production of graphene suitable for electronic applications.

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“…The etching (e.g. using Fe(NO 3 ) 3 ) also does not lead to satisfactory results, since etch quarries and residues are left on the surface, even after subsequent foil annealing [33].…”

Section: Resultsmentioning

confidence: 99%

Ultrasmooth metallic foils for growth of high quality graphene by chemical vapor deposition

et al. 2014

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“…Thus, the quality of graphene film strongly relies on the surface morphology of underlying Cu substrate [14].…”

mentioning

confidence: 99%

Effects of annealing on copper substrate surface morphology and graphene growth by chemical vapor deposition

Ibrahim

Akhtar

Atieh

et al. 2015

Carbon

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“…Cu). [26][27][28][29][30] In addition, increasing the growth time on Cu foils under LPCVD can effectively decrease the density of bilayer graphene region mixing with monolayer graphene film. 5a and b).…”

Section: Lpcvd For Uniform Graphene Filmsmentioning

confidence: 99%

Design of catalytic substrates for uniform graphene films: from solid-metal to liquid-metal

et al. 2015

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The controllable synthesis of uniform graphene with a specific layer number is crucial for both fundamental research and emerging applications due to the high sensitivity of the various extraordinary physicochemical properties of graphene to its layer numbers. However, the excessive segregation of extra C, the inactivation of the self-limiting of Cu and the superabundant nucleation at grain boundaries and defect sites render that the controllable synthesis of uniform graphene is still a challenge. By the employment of various solid and liquid metals with quasi-atomically smooth surfaces to avoid defects or grain boundaries, a series of studies have been performed and significant improvements have been achieved in the controllable synthesis of uniform graphene films. In this review, the representative strategies of designing catalytic substrates, including polycrystalline metals, single-crystalline metals, binary metal alloys and liquid metals, are highlighted. The future of the controllable synthesis of uniform graphene is also discussed.

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Mesoscale Scanning Electron and Tunneling Microscopy Study of the Surface Morphology of Thermally Annealed Copper Foils for Graphene Growth

Cited by 25 publications

References 32 publications

Ultrasmooth metallic foils for growth of high quality graphene by chemical vapor deposition

Ultrasmooth metallic foils for growth of high quality graphene by chemical vapor deposition

Effects of annealing on copper substrate surface morphology and graphene growth by chemical vapor deposition

Design of catalytic substrates for uniform graphene films: from solid-metal to liquid-metal

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