Interactions between metals and carbon nanotubes: at the interface between old and new materials

Banhart, Florian

doi:10.1039/b9nr00127a

Cited by 203 publications

(126 citation statements)

References 129 publications

(188 reference statements)

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“…We choose an armchair (10,10) SWNT with a typical size (∼14Å in diameter) and consider the (111) surfaces of fcc metals, including a simple sp metal (Al), noble metals (Cu, Ag, and Au), and 4d and 5d transition metals (Rh, Pd, Ir, and Pt). These metals have most often been used as electrodes and supporting substrates in both experiments and theoretical investigations, 8,23 and are of practical use in device fabrications. 6,7 In the present work, 3d transition metals are not considered partly because of their different natures such as magnetic and highly catalytic properties, which will be an issue of separate investigations.…”

Section: Introductionmentioning

confidence: 99%

“…We focus on metal contact and consider the situation where a metallic CNT or graphene is deposited (or epitaxially grown) on metal surfaces. Electronic and morphological properties of these interfaces have been issues of interest and a number of theoretical and experimental investigations have been made for both CNTs [8][9][10][11][12][13][14][15][16][17][18][19][20][21] and graphene 5,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] on metal surfaces. Earlier investigations for graphene on metals are reviewed in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Transfer doping of a metallic carbon nanotube and graphene on metal surfaces

Hasegawa

Nishidate

2011

Phys. Rev. B

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In this paper we show the results of systematic investigations for the electronic-structure modifications of an armchair (10,10) single-walled carbon nanotube (SWNT) and graphene adsorbed on metal surfaces. The first-principles calculations based on the density-functional theory (DFT) were used to investigate transfer doping of these nanomaterials adsorbed on the fcc (111) surfaces of Al, noble metals (Ag, Cu, and Au), and transition metals (Rh, Pd, Ir, and Pt). We confirmed that the SWNT weakly interacts with the surfaces of Al and the noble metals (physisorption), while it strongly bonds to the transition-metal surfaces (chemisorption). The graphene adsorption on these metal surfaces is reinvestigated and found to be similar except for the Ir and Pt substrates, for which the interaction is weak as in the case of Al and the noble metal substrates. A phenomenological model is also developed on the basis of the rigid-band picture appropriate to physisorption. This model provides a relation between the Fermi-level shift and work-function difference and can conveniently be used in interpreting the DFT results for the transfer doping of both a SWNT and graphene on metal surfaces. We also identify the effect of hybridization between the graphene π orbitals and metallic valence states on the Fermi-level shift and find that the hybridization induces an extra downward shift of the linear-dispersion bands near the Dirac point relative to the other bands.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transfer doping of a metallic carbon nanotube and graphene on metal surfaces

Hasegawa

Nishidate

2011

Phys. Rev. B

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“…The effect of a foreign (noncarbon) atom on the properties of graphene depends on the bonding between the atom and graphene. 52 If the bond is weak, only physisorption due to van der Waals interaction occurs. If the interaction is stronger, covalent bonding between the foreign atom and the nearest carbon atoms leads to chemisorption.…”

Section: Defect Typesmentioning

confidence: 99%

Structural Defects in Graphene

2010

Self Cite

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Graphene is one of the most promising materials in nanotechnology. The electronic and mechanical properties of graphene samples with high perfection of the atomic lattice are outstanding, but structural defects, which may appear during growth or processing, deteriorate the performance of graphenebased devices. However, deviations from perfection can be useful in some applications, as they make it possible to tailor the local properties of graphene and to achieve new functionalities. In this article, the present knowledge about point and line defects in graphene are reviewed. Particular emphasis is put on the unique ability of graphene to reconstruct its lattice around intrinsic defects, leading to interesting effects and potential applications. Extrinsic defects such as foreign atoms which are of equally high importance for designing graphene-based devices with dedicated properties are also discussed.

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“…More data on irradiation-mediated contacts between carbon and metal nanosystems can be found in a recent review article. 359 …”

Section: Welding and Coalescence Of Carbon Nanotubes Under Electron Beammentioning

confidence: 99%

Ion and electron irradiation-induced effects in nanostructured materials

Krasheninnikov¹,

Nordlund²

2010

Journal of Applied Physics

947

591

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A common misconception is that the irradiation of solids with energetic electrons and ions has exclusively detrimental effects on the properties of target materials. In addition to the well-known cases of doping of bulk semiconductors and ion beam nitriding of steels, recent experiments show that irradiation can also have beneficial effects on nanostructured systems. Electron or ion beams may serve as tools to synthesize nanoclusters and nanowires, change their morphology in a controllable manner, and tailor their mechanical, electronic, and even magnetic properties. Harnessing irradiation as a tool for modifying material properties at the nanoscale requires having the full microscopic picture of defect production and annealing in nanotargets. In this article, we review recent progress in the understanding of effects of irradiation on various zero-dimensional and one-dimensional nanoscale systems, such as semiconductor and metal nanoclusters and nanowires, nanotubes, and fullerenes. We also consider the two-dimensional nanosystem graphene due to its similarity with carbon nanotubes. We dwell on both theoretical and experimental results and discuss at length not only the physics behind irradiation effects in nanostructures but also the technical applicability of irradiation for the engineering of nanosystems.

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Interactions between metals and carbon nanotubes: at the interface between old and new materials

Cited by 203 publications

References 129 publications

Transfer doping of a metallic carbon nanotube and graphene on metal surfaces

Transfer doping of a metallic carbon nanotube and graphene on metal surfaces

Structural Defects in Graphene

Ion and electron irradiation-induced effects in nanostructured materials

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