The Raman scattering of carbon nanotubes produced in different inert gases and their pressures by arc discharge

Zhang, Haiyan; Chen, Jian; Liu, Songhao; Chen, Dihu; Wu, Chuanbin; He, Yi; Liang, Lizheng; Shao-qi, Peng

doi:10.1088/1009-1963/9/5/011

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…The D* peak is unique for multiwalled carbon nanotubes. Except the strong D* band, an additional weak band is observed at 2900 cm-1 which is thought to arise from a combination of the Raman modes at 1350 cm -1 and 1580 cm -1 [21][22][23][24][25][26][27]. The spectra for SiOC also show peaks of D band and G band indicating the presence of disordered free carbon present.…”

Section: Micro-raman Spectroscopymentioning

confidence: 99%

Morphological Studies on CNT Reinforced SiC/SiOC Composites

et al. 2010

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Carbon nanotubes (CNTs) have been grown on commercially available silicon carbide (SiC) fabric by the catalytic chemical vapour deposition (CCVD) technique. These CNT coated SiC fabrics were used to develop Silicon Carbide-Carbon Nanotube-Silicon oxy Carbide matrix composites (SiC/CNTs/SiOC) by sol gel technique. Silicon oxy Carbide refers to carbon containing silicates wherein oxygen and carbon atoms share bonds with silicon in the amorphous network structure. In this approach, alkyl-substituted silicon alkoxides, which are molecular precursors containing oxygen and carbon functionalities on the silicon, are hydrolyzed and condensed in the presence of sucrose, which provides excess of carbon to bond into the silicon alkoxide network during hydrolysis. A low-temperature (1000°C) heat-treatment of the gel creates a glassy silicate material whose molecular structure consists of an oxygen/carbon anionic network. The microstructures of these hybrid materials and their composites have been studied using scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscope.

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Section: Micro-raman Spectroscopymentioning

confidence: 99%

Morphological Studies on CNT Reinforced SiC/SiOC Composites

et al. 2010

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“…Zhao et al [6] used H 2 -Ar atmospheres comprising 60% Ar-40% H 2 under a pressure of 266.6 mbar in their work, while Luo et al [7] and Sun et al [8] utilised high purity hydrogen at a pressure 799.9 mbar to optimize the yield in the process. Farhat et al [9], Hai-yan et al [10], and Sugai et al [11] all successfully employed an Ar atmosphere to optimize the yield of the nanotubes produced. The position of the electrode axis does not noticeably affect the MWNT quality or quantity.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes Synthesis via Arc Discharge with a Yttria Catalyst

et al. 2013

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A facile method is proposed to use a computer controlled Arc discharge gap between graphite electrodes together with an yttrianickel catalyst to synthesize carbon nanotubes under an Ar-H 2 gases mixture atmosphere by applying different DC currents and pressure. This produces carbon nanotubes with decreased diameters and increased length. XRD evidence indicated a shift toward higher crystallinity nanotubes. Yields of the CNTs after purification were also enhanced.

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