Modeling studies of amorphous carbon

Beeman, David; Silverman, J.; Lynds, R.; Anderson, Mark R.

doi:10.1103/physrevb.30.870

Cited by 683 publications

(173 citation statements)

References 17 publications

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“…Therefore one can estimate the order of crystallinity in the material from the corresponding halfwidth (FWHM). An amorphous structure leads typically to a halfwidth (FWHM) of approximately 200 cm −1 [13] as observed in the case of deposition at 1000 • C. In the case of nanotubes deposited at 650 • C sharp peaks (FWHM ∼90 cm −1 ) reveal their much higher degree of crystalline perfection.…”

Section: Raman Spectroscopymentioning

confidence: 97%

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Raman Spectroscopy and Field Emission Measurements on Catalytically Grown Carbon Nanotubes

et al. 2002

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We used microcontact printing to pattern a silicon surface with an iron-containing catalytic solution. Multi-wall carbon nanotubes were subsequently grown on the patterned areas by chemical vapor deposition at temperatures between 650 and 1000 • C. We demonstrate that the diameter of the catalytically grown multi-wall nanotubes increases with the deposition temperature. Raman spectroscopy has been used to investigate the crystalline character of the obtained structures and it is found that the fraction of the nano-crystalline shell increases with the temperatures. The measurement of the field emission properties shows a correlation between the tube diameter and the emission field values.

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Section: Raman Spectroscopymentioning

confidence: 97%

“…[12,13]) that smaller particles as well as structural imperfections will broaden the first order peaks from graphite. Therefore one can estimate the order of crystallinity in the material from the corresponding halfwidth (FWHM).…”

Section: Raman Spectroscopymentioning

confidence: 99%

Raman Spectroscopy and Field Emission Measurements on Catalytically Grown Carbon Nanotubes

et al. 2002

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“…19 SERS spectra of central irradiated areas show that peaks at 1960 and 2095 cm −1 can be identified with cumulenes ͑C v C͒ n and polynes ͑-C w C-͒ n , respectively. 3,12 The presence of a diamond component can be seen in the lightly ablated area, which displays a band at 1260 cm −1 due to tetrahedral carbon 20 diamond at the L point. 21 Trans-polyacetylene chains having different lengths are identified by the presence of several modes at 1150, 1190, and 1450 cm −1 .…”

mentioning

confidence: 99%

Direct synthesis of sp-bonded carbon chains on graphite surface by femtosecond laser irradiation

Rybachuk

et al. 2007

Applied Physics Letters

113

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Microscopic phase transformation from graphite to sp-bonded carbon chains (carbyne) and nanodiamond has been induced by femtosecond laser pulses on graphite surface. UV/surface enhanced Raman scattering spectra and x-ray photoelectron spectra displayed the local synthesis of carbyne in the melt zone while nanocrystalline diamond and trans-polyacetylene chains form in the edge area of gentle ablation. These results evidence possible direct “writing” of variable chemical bonded carbons by femtosecond laser pulses for carbon-based applications.

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“…depend upon the bonding arrangement of the film and hence the sp 2 -and sp 3 -bonded carbon atoms can be changed by these process parameters. Beeman et al (21) suggested that the shift in G band toward the lower frequency is due to the increase of sp 3 -bonded atomic sites in amorphous carbon films. The I D /I G ratio and FWHM have been used as graphitization indication of the structure of carbon-based materials (22).…”

Section: Synthesis Of Ns-carbon Films Deposited By Mw Pecvd Techniquementioning

confidence: 99%

Synthesis of Nanostructure Carbon Films Deposited by Microwave Plasma-Enhanced Chemical Vapor Deposition Technique at Room Temperature

Bisht

Chockalingam

Panwar

et al. 2014

Fullerenes, Nanotubes and Carbon Nanostructures

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This paper reports the synthesis of nanostructure carbon (ns-carbon) films deposited by microwave plasma-enhanced chemical vapor deposition (MW PECVD) technique at low pressure and room temperature. ns-carbon films have been characterized by scanning electron microscopy, electron dispersive x-ray spectroscopic analysis, atomic force microscopy, Raman spectroscopy, X-ray diffraction, UV-visible spectroscopy and high-resolution transmission electron microscopy. The shape of nanostructure is changing from granular to sheet-like structure when the pressure increased from 55 to 110 mTorr.

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Modeling studies of amorphous carbon

Cited by 683 publications

References 17 publications

Raman Spectroscopy and Field Emission Measurements on Catalytically Grown Carbon Nanotubes

Raman Spectroscopy and Field Emission Measurements on Catalytically Grown Carbon Nanotubes

Direct synthesis of sp-bonded carbon chains on graphite surface by femtosecond laser irradiation

Synthesis of Nanostructure Carbon Films Deposited by Microwave Plasma-Enhanced Chemical Vapor Deposition Technique at Room Temperature

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