Characterization of Thin Carbon Films Produced by the Magnetron Sputtering Technique

Silva, Danilo Lopes Costa e; Kassab, L.R.P.; Martinelli, J.R.; Santos, Amilton M.; Ribeiro, Sidney J. L.; Santos, Molíria V.

doi:10.1590/1980-5373-mr-2015-0058

Cited by 15 publications

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References 13 publications

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“…In recent publications, our group has reported on the preparation of carbon thin films by magnetron sputtering 17,18 . This work presents new results of Raman Spectroscopy for carbon thin films produced by the magnetron sputtering technique, and also determines the influence of different parameters as deposition time, buffer-layer (Co, Cu and Ni), substrate type and heat treatment on the crystallinity degree of the films.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Carbon thin Films Using Raman Spectroscopy

et al. 2018

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Carbon thin films deposited by the magnetron sputtering technique were evaluated by Raman spectroscopy to study the influence on their crystallinity caused by different parameters like the carbon deposition time, the different buffer-layers and substrates employed and also two distinct heat treatments. The present results showed that the choice of these parameters plays an important role in the production of these films. The results also indicate the possibility of using the technique for the production of carbon thin films to be employed in future in applications with controlled content of structural defects, predominance of ordered sp 2 bondings and tendency of graphitization.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Carbon thin Films Using Raman Spectroscopy

et al. 2018

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“…With the same other growth conditions, a growth temperature window, which covers 900°C, was identified for the formation of continuous high-quality h-BN films in the heterostructures as shown in figure S2 (supporting information). Thermodynamically, G growth on Co can start at a temperature of around or above 700°C (T G ) [30,31]. The black hatching areas in figure 1(a) show the C concentration in Co substrate at different growth regions (i.e., 1, 2, and 3), and the black horizontal dashed lines display the C solubility levels in Co substrate at designated temperatures (i.e., T 0%C , T G and T growth ).…”

Section: Methodsmentioning

confidence: 99%

Effect of high carbon incorporation in Co substrates on the epitaxy of hexagonal boron nitride/graphene heterostructures

Khanaki

Tian

et al. 2017

Nanotechnology

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We carried out a systematic study of hexagonal boron nitride/graphene (h-BN/G) heterostructure growth by introducing high incorporation of a carbon (C) source on a heated cobalt (Co) foil substrate followed by boron and nitrogen sources in a molecular beam epitaxy system. With the increase of C incorporation in Co, three distinct regions of h-BN/G heterostructures were observed from region (1) where the C saturation was not attained at the growth temperature (900 °C) and G was grown only by precipitation during the cooling process to form a 'G network' underneath the h-BN film; to region (2) where the Co substrate was just saturated by C atoms at the growth temperature and a part of G growth occurs isothermally to form G islands and another part by precipitation, resulting in a non-uniform h-BN/G film; and to region (3) where a continuous layered G structure was formed at the growth temperature and precipitated C atoms added additional G layers to the system, leading to a uniform h-BN/G film. It is also found that in all three h-BN/G heterostructure growth regions, a 3 h h-BN growth at 900 °C led to h-BN film with a thickness of 1-2 nm, regardless of the underneath G layers' thickness or morphology. Growth time and growth temperature effects have been also studied.

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Green synthesis of templated porous carbons

et al. 2022

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Porous carbon materials such as activated carbons are widely used industrially for the purposes of purification, decolourization, deodorization, and gas storage, among others. Routes for the synthesis of these materials employing templates have increasingly attracted attention due to the ease of manipulating the characteristics of the final product. In the present work, a simple synthesis method was applied for the production of highly porous carbon materials using commercial sugar as the carbon source, Aerosil silica as a template, and deionized water. The synthesis procedure was as follows: (I) Gel formation; (II) carbonization of the gels; (III) removal of the silica template; (IV) activation. The materials were characterized by N2 and CO2 physisorption, Raman spectroscopy, X‐ray diffraction, Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy, and thermogravimetric analysis. The aging time had an important influence on the specific area and porosity of the material, with physisorption analysis revealing a high specific area and pore volume. The activation procedures further contributed to significantly increasing the specific area (up to 1158 m2 g−1) and pore volume (up to 1.65 cm3 g−1). The X‐ray diffractograms and Raman spectra identified the formation of semi‐crystalline structures in the material, with the presence of a random distribution of graphite and graphene oxide, in addition to amorphous carbon. FTIR analysis showed the presence of bands corresponding to aromatic groups. The results demonstrated that it was possible to obtain materials with excellent potential for use in different industrial sectors using simple raw materials and a technique that is easy to reproduce.

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Characterization of Thin Carbon Films Produced by the Magnetron Sputtering Technique

Cited by 15 publications

References 13 publications

Evaluation of Carbon thin Films Using Raman Spectroscopy

Evaluation of Carbon thin Films Using Raman Spectroscopy

Effect of high carbon incorporation in Co substrates on the epitaxy of hexagonal boron nitride/graphene heterostructures

Green synthesis of templated porous carbons

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