Heteroepitaxial graphite on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>6</mml:mn><mml:mi>H</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">SiC</mml:mi><mml:mn /><mml:mo>(</mml:mo><mml:mn>0001</mml:mn><mml:mo>)</mml:mo><mml:mo>:</mml:mo></mml:math> Interface formation through conduction-band electronic structure

Forbeaux, I.; Themlin, J.‐M.; Debever, J.M.

doi:10.1103/physrevb.58.16396

Cited by 686 publications

(613 citation statements)

References 44 publications

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“…Another band has the top of dispersion at ∼5 eV at the point and exhibits a strong downward dispersion toward the K point. The electronic structure of C 6 LiC 6 looks quite similar to that of C 6 X (X = Li, Ca, La, Eu, and Yb), 1,6,8,9,15,[18][19][20] although the weak intensity near the point is not observed in pristine graphene or graphite. In order to see more clearly these dispersive features in the ARPES spectra, we have mapped out the band structure and show the result in Fig.…”

Section: Resultsmentioning

confidence: 75%

“…The LEED pattern is quite similar between monolayer and bilayer graphene, and consists of basically three types of spots; (i) the (1×1) spot from the bulk SiC substrate (Si(1×1)), 15 (ii) the weak 6 √ 3×6 √ 3R30 • spot due to the buffer layer, [15][16][17] and (iii) the C(1×1) spot from the honeycomb atomic pattern of graphene. 15,17 We find that the intensity of the C(1×1) spot in bilayer graphene is stronger than that of monolayer counterpart. When we deposit Li atoms onto these graphene films, the LEED patterns show discernible differences between monolayer and bilayer graphene, as shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of Li-intercalated bilayer graphene

et al. 2011

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We have succeeded in fabricating Li-intercalated bilayer graphene on silicon carbide. The low-energy electron diffraction from Li-deposited bilayer graphene shows a sharp 3 × 3 R 30° pattern in contrast to Li-deposited monolayer graphene. This indicates that Li atoms are intercalated between two adjacent graphene layers and take the same well-ordered superstructure as in bulk C6Li. The angle-resolved photoemission spectroscopy has revealed that Li atoms are fully ionized and the π bands of graphene are systematically folded by the superstructure of intercalated Li atoms, producing a snowflake-like Fermi surface centered at the Γ point. The present result suggests a high potential of Li-intercalated bilayer graphene for application to a nano-scale Li-ion battery

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Fabrication of Li-intercalated bilayer graphene

et al. 2011

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“…This approximation has been proved to well describe the electronic properties of epitaxial graphene on SiC 9,11 . More importantly, the √ 3 × √ 3R30 o reconstruction is also been observed in experiments during epitaxial growth of graphene on both (C-terminated) SiC(0001) surface 6,12 and (Si-terminated) SiC(0001) surface [13][14][15] . To address the doping effects in graphene-SiC system, a 2 √ 3 × 2 √ 3R30 o SiC substrate cell, which accommodates a 4 × 4 graphene cell, is constructed.…”

Section: Fig 1: (Color Online)mentioning

confidence: 72%

Controlling doping in graphene through a SiC substrate: A first-principles study

2011

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Controlling the type and density of charge carriers by doping is the key step for developing graphene electronics. However, direct doping of graphene is rather challenge. Based on firstprinciples calculations, a concept of overcoming doping difficulty in graphene via substrate is reported. We find that doping could be strongly enhanced in epitaxial graphene grown on silicon carbide substrate. Compared to free-standing graphene, the formation energies of the dopants can decrease by as much as 8 eV. The type and density of the charge carriers of epitaxial graphene layer can be effectively manipulated by suitable dopants and surface passivation. More importantly, contrasting to the direct doping of graphene, the charge carriers in epitaxial graphene layer are weakly scattered by dopants due to the spatial separation between dopants and conducting channel. Finally, we show that similar idea can also be used to control magnetic properties, e.g., induces a half-metallic state in the epitaxial graphene without magnetic impurity doping.

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“…4,147 Transparent graphene thin films can be prepared using a variety of techniques including micromechanical exfoliation, 2 epitaxial growth, 148 chemical VD, 42 and GO reduction at high temperatures. 47,149,150 In particular, TCEs based on rGO can be fabricated via cheap solution-based methods, and their work functions can also be engineered via chemical doping or structural engineering.…”

Section: Solar Cellsmentioning

confidence: 99%

Graphene/polymer composites for energy applications

Sun

Shi

2012

J Polym Sci B Polym Phys

235

120

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Graphene has wide potential applications in energyrelated systems, mainly because of its unique atom-thick twodimensional structure, high electrical or thermal conductivity, optical transparency, great mechanical strength, inherent flexibility, and huge specific surface area. For this purpose, graphene materials are frequently blended with polymers to form composites, especially when fabricating flexible devices. Graphene/polymer composites have been explored as electrodes of supercapacitors or lithium ion batteries, counter electrodes of dye-sensitized solar cells, transparent conducting electrodes and active layers of organic solar cells, catalytic electrodes, and polymer electrolyte membranes of fuel cells. In this review, we summarize the recent advances on the synthesis and applications of graphene/polymer composites for energy applications. The challenges and prospects in this field have also been discussed. V C 2012 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 231-253 KEYWORDS: composites; energy; fuel cell; graphene; lithium ion battery; redox polymers; solar cell; supercapacitor; synthesis INTRODUCTION Energy is one of the most important recent topics of concern to human society. To replace conventional fossil fuels, clean and renewable energies based on sunlight, wind, new chemicals, and biofuels are urgently demanded. Therefore, materials that can directly convert or store renewable energies are being extensively studied. Among them, graphene has recently attracted a great deal of attention because of its unique atom-thick two-dimensional (2D) structure 1,2 and excellent electrical, 2 thermal, 3 optical, and mechanical properties. 4,5 Graphene is a promising material for applications in various energy-related systems such as supercapacitors, 6-9 secondary batteries, 10-14 solar cells, 15-17 and fuel cells. [18][19][20] For this purpose, graphene materials are frequently blended with polymers to form functional composites. [21][22][23] The polymer component can improve the processability and/or flexibility of graphene materials, and also possibly provide them with new functions. To date, various graphene composites with insulating or conducting polymers (CPs) have been prepared through noncovalent 22 or covalent approaches. 24 They have also been applied as electrodes for supercapacitors and lithium ion batteries (LIBs), 25-29 counter electrodes of dye-sensitized solar cells (DSSCs), 15,30,31 and transparent conducting electrodes (TCEs) 32,33 or active layers of organic solar cells, 34 catalytic electrodes, and polymer electrolyte membranes of fuel cells. [35][36][37] This review focuses on summarizing the recent advances in the synthesis of graphene/polymer composites and their energy applications.

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Heteroepitaxial graphite on6H−SiC(0001): Interface formation through conduction-band electronic structure

Cited by 686 publications

References 44 publications

Fabrication of Li-intercalated bilayer graphene

Fabrication of Li-intercalated bilayer graphene

Controlling doping in graphene through a SiC substrate: A first-principles study

Graphene/polymer composites for energy applications

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