Raman and thermal desorption spectroscopy analyses of amorphous graphite-like carbon films with incorporated xenon

Viana, G.A.; Marques, F. C.

doi:10.1016/j.vacuum.2014.10.019

Cited by 15 publications

(6 citation statements)

References 82 publications

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“…The required temperature of annealing for the formation of graphene on both Co and Si(100) was reached at 600 • C, while at ≤550 • C temperature, amorphous graphite-like carbon was formed on cobalt, and no carbonaceous layer was found on silicon (Figure 7a,b). Amorphous graphite-like carbon was recognized by the half-merged D and G peaks and the absence of the 2D peak [51][52][53]. Similar results were reported for experiments of the graphene synthesis on SiO 2 by annealing a-C and Ni bilayer at 575 • C temperature [54].…”

Section: Temperature Of Annealingsupporting

confidence: 83%

Cobalt-Activated Transfer-Free Synthesis of the Graphene on Si(100) by Anode Layer Ion Source

et al. 2022

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In this research, the graphene was grown directly on the Si(100) surface at 600 °C temperature using an anode layer ion source. The sacrificial catalytic cobalt interlayer assisted hydrocarbon ion beam synthesis was applied. Overall, two synthesis process modifications with a single-step graphene growth at elevated temperature and two-step synthesis, including graphite-like carbon growth on a catalytic Co film and subsequent annealing at elevated temperature, were applied. The growth of the graphene was confirmed by Raman scattering spectroscopy and X-ray photoelectron spectroscopy. The atomic force microscopy and scanning electron microscopy were used to study samples’ surface morphology. The temperature, hydrocarbon ion beam energy, and catalytic Co film thickness effects on the structure and thickness of the graphene were investigated. The graphene growth on Si(100) by two-step synthesis was beneficial due to the continuous and homogeneous graphene film formation. The observed results were explained by peculiarities of the thermally, ion beam, and catalytic metal activated hydrocarbon species dissociation. The changes of the cobalt grain size, Co film roughness, and dewetting were taken into account.

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Section: Temperature Of Annealingsupporting

confidence: 83%

Cobalt-Activated Transfer-Free Synthesis of the Graphene on Si(100) by Anode Layer Ion Source

et al. 2022

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“…For the spectra of both Fe-Co/ASC and ASC supports, the two dominant peaks are at 1340 and 1598 cm −1 , generated by the carbon sites. [37][38][39] Both peaks decreased a lot after the metal loading. For Fe-Co/ASC, another obvious peak could be observed at 683 cm −1 and was assigned to CoFe 2 O 4 .…”

Section: Catalyst Characterizationmentioning

confidence: 97%

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

et al. 2016

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A novel rotary reactor was proposed for nitrogen oxides (NO x ) reduction by carbon monoxides (CO) in order to avoid the oxygen inhibition effect. NO x adsorption and reduction were separated into two different zones in the proposed rotary reactor. NO x in the flue gas was adsorbed onto the catalyst surface in the adsorption zone and then reduced by the reducing gas in the reduction zone. The performance of the proposed reaction process was investigated in a simulated rotary reactor. The catalysts used were lab synthesized, Fe and Co co-impregnated over activated semi-coke. The results showed an excellent NO x removal efficiency at 200 and 250℃. However, the NO x reduction efficiencies were always much lower than the removal efficiency. Most of the removed NO x was simply passed from the flue gas to the reducing gas. It is very important to feed great excess CO in the reduction zone, since CO tended to be firstly consumed by residue oxygen in the reduction zone and then be involved in the NO+CO reaction. In an in situ DRIFTs study of the dynamic NO x adsorptionreduction process, it was found that poor reduction and desorption behavior of the store nitrates was the bottleneck of the NO x adsorption-reduction process.

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“…Graphite-like carbon (GLC) films are one kind of amorphous carbon films, consisting of significant sp 2 bond structure cross-linked by a small amount of sp 3 bonds [1]. Due to their unique structure, GLC films exhibit favorable properties such as high hardness (H), low friction coefficient (CoF), exceptional wear resistance, high optical transparency, desirable chemical inertness and bio-comparability [1][2][3][4], thus leading to widespread applications in optics, mechanical engineering and materials science, and also showing a great prospect in the field of aerospace as a new generation of solid lubrication films [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of graphite-like carbon films with varied thickness

Shi

Liskiewicz

Beake

et al. 2020

Tribology International

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Graphite-like carbon (GLC) films with different thickness were deposited on 316L stainless steel using closed field unbalanced magnetron sputtering system to investigate the influence of film thickness on the microstructure, mechanical and tribological properties. The results showed that the surface of the deposited films exhibits granularlike morphology, the sp 2 content, surface roughness increase with the increase of film thickness, leading to the lower of hardness and higher of the internal stress. Both of the of friction curves obtained by nano-tribological tests and fretting wear experiments revealed a three-stage evolution tendency with the same wear mechanism for the first two stages. The intermediate thickness GLC film had the lowest specific wear rate, whilst the fretting fatigue life increased with film thickness.

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Raman and thermal desorption spectroscopy analyses of amorphous graphite-like carbon films with incorporated xenon

Cited by 15 publications

References 82 publications

Cobalt-Activated Transfer-Free Synthesis of the Graphene on Si(100) by Anode Layer Ion Source

Cobalt-Activated Transfer-Free Synthesis of the Graphene on Si(100) by Anode Layer Ion Source

Nitrogen oxides reduction by carbon monoxide over semi-coke supported catalysts in a simulated rotary reactor: reaction performance under dry conditions

Tribological performance of graphite-like carbon films with varied thickness

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