Fullerenelike arrangements in carbon nitride thin films grown by direct ion beam sputtering

Gago, R.; Abrasonis, G.; Mücklich, A.; Möller, W.; Czigány, Zsolt; Radnóczi, G.

doi:10.1063/1.2008366

Cited by 24 publications

(9 citation statements)

References 20 publications

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“…1͑a͔͒, and the layer spacing is approximately 0.34 nm, which is in good agreement with the layer spacing of the graphite face ͑0002͒. These features are typical of FL arrangements, 10,15 and are more clearly observed at the edge of the film where an individual structure of concentric FL shells could be distinguished. As the pulse duty cycle increased to 50%, similar microstructure was observed in the films, but with the smaller ordering degree and the shortened ordering range ͓Fig.…”

supporting

confidence: 78%

“…Until now, the nitrided or the nonhydrogenated carbon films with FL structures have been synthesized by different techniques. [5][6][7][8][9][10] Nevertheless, FL nanostructured hydrogenated carbon films were scarcely reported, [11][12][13] and the growth mechanism was not known.…”

mentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10] The FL nanostructure is considered to be the origin of the unusual character, since it extends extraordinary strength of a planar sp 2 -coordinated carbon network into three dimensions and prevents interplanar slip and bond breaking by reversible bond rotation and bond angle deflection. Figure 3͑a͒ shows the hardness and elastic recovery of the present films as a function of the pulse duty cycle.…”

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confidence: 99%

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Effects of pulse bias duty cycle on fullerenelike nanostructure and mechanical properties of hydrogenated carbon films prepared by plasma enhanced chemical vapor deposition method

Zhao

et al. 2009

Journal of Applied Physics

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confidence: 78%

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confidence: 99%

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confidence: 99%

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Effects of pulse bias duty cycle on fullerenelike nanostructure and mechanical properties of hydrogenated carbon films prepared by plasma enhanced chemical vapor deposition method

Zhao

et al. 2009

Journal of Applied Physics

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“…Since in SAED scattering by several nanoclusters -situated in the selected area -is involved, we calculated the overall scattered intensity of several randomly oriented clusters. In this way, we ignore any texture in actual materials such as is commonly reported for FL-CNx [12]. Atomic coordinates of nanoclusters were generated using perfect crystal lattice coordinates.…”

Section: Models and Calculationmentioning

confidence: 99%

Interpretation of electron diffraction patterns from amorphous and fullerene-like carbon allotropes

Czigány

Hultman

2010

Ultramicroscopy

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The short range order in amorphous and fullerene-like carbon compounds has been characterized by selected area electron diffraction patterns (SAED) and compared with simulations of model nanoclusters. .Broad rings in SAED pattern from fullerene-like CN x at ~1.2 Å, ~2 Å, and ~3.5 Å indicate a short-range order similar to graphite, but peak shifts indicate sheet curvature in agreement with high-resolution transmission electron microscopy images. Fullerene-like CP x exhibits rings at ~1.6 Å and 2.6 Å that can be explained if it consists of fragments with short-range order and high curvature similar to that of C 20 .

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“…Therefore, the remarkable mechanical properties of the FL-CN x thin films are to a great extent a consequence of nitrogen incorporation in the carbon matrix, which can be optimized and controlled using different deposition techniques and by adjusting the deposition parameters [57,75,76,84].…”

Section: A Bit Of Historymentioning

confidence: 99%

Nanostructured carbon-based thin films : prediction and design

Goyenola¹

2015

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Carbon-based thin films are a vast group of materials of great technological importance. Thanks to the different bonding options for carbon, a large variety of structures (from amorphous to nanostructured) can be achieved in the process of film synthesis. The structural diversity increases even more if carbon is combined with relatively small quantities of atoms of other elements. This results in a set of materials with many different interesting properties for a wide range of technological applications.This doctoral thesis is about nanostructured carbon-based thin films. In particular, the focus is set on theoretical modeling, prediction of structural features and design of sulfocarbide (CS x ) and carbon fluoride (CF x ) thin films.The theoretical approach follows the synthetic growth concept (SGC) which is based on the density functional theory. The SGC departure point is the fact that the nanostructured films of interest can be modeled as assemblies of low dimensional units (e.g., finite graphene-like model systems), similarly to modeling graphite as stacks of graphene sheets. Moreover, the SGC includes a description of the groups of atoms that act as building blocks (i.e., precursor species) during film deposition, as well as their interaction with the growing film.This thesis consists of two main parts: Prediction: In this work, I show that nanostructured CS x thin films can be expected for sulfur contents up to 20 atomic % with structural characteristics that go from graphite-like to fullerene-like (FL). In the case of CF x thin films, I found that a diversity of structures can be formed depending on the fluorine concentration. Short-range ordered structures, such as FL structure, can be expected for low concentrations (up to 5 atomic %). For increasing fluorine concentration, diamond-like and polymeric structures should predominate. As a special case, I also studied the ternary system CS x F y . The calculations show that CS x F y thin films with nanostructured features should be possible to synthesize at low sulfur and fluorine ([S + F] < 10 at.%) concentrations and the structural characteristics can be described and explained in terms of the binaries CS x and CF x .Design: The carbon-based thin films predicted in this thesis were synthesized by reactive magnetron sputtering. My modeling results regarding structure, composition, and analysis of precursor species (availability and role during deposition process) were successfully combined with the experimental techniques in the quest for thin films with desired structural features. They were used as guidance for the depositions and to understand the properties of the resulting thin films. v vi Populärvetenskaplig sammanfattningMaterialvetenskapär ett stort tvärvetenskapligt forskningsfält som handlar om att upptäcka och konstruera nya material såväl som att förbättra befintliga. Allting vi använder i vårt dagliga liv, från kläder till tekniska apparater,är skapat för att tillgodose vissa krav ochär ett resultat av att många människor har invester...

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Fullerenelike arrangements in carbon nitride thin films grown by direct ion beam sputtering

Cited by 24 publications

References 20 publications

Effects of pulse bias duty cycle on fullerenelike nanostructure and mechanical properties of hydrogenated carbon films prepared by plasma enhanced chemical vapor deposition method

Effects of pulse bias duty cycle on fullerenelike nanostructure and mechanical properties of hydrogenated carbon films prepared by plasma enhanced chemical vapor deposition method

Interpretation of electron diffraction patterns from amorphous and fullerene-like carbon allotropes

Nanostructured carbon-based thin films : prediction and design

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