Catalyst free synthesis of high-purity carbon nanotubes by thermal plasma jet

Hahn, Joeoong; Heo, Soo Bong; Suh, Jin Soo

doi:10.1016/j.carbon.2005.05.013

Cited by 25 publications

(11 citation statements)

References 12 publications

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“…Although some new methods are devised to synthesize high quality CNTs, presently CNTs are mainly produced by three techniques: arc discharge, laser ablation, and chemical vapor decomposition [ 180,181 ]. The raw CNT materials produced by these methods are far from perfect, and contain numerous defects and impurities which impair the thermal conductivities of the CNTs [ 182 , 183 ].…”

Section: Purification and Graphitizationmentioning

confidence: 99%

Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

Han

Fina

2011

Progress in Polymer Science

2,278

1,323

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Thermally conductive polymer composites offer new possibilities for replacing metal parts in several applications, including power electronics, electric motors and generators, heat exchangers etc., thanks to the polymer advantages such as light weight, corrosion resistance and ease of processing. Current interest to improve the thermal conductivity of polymers is focused on the selective addition of nanofillers with high thermal conductivity. Unusually high thermal conductivity makes carbon nanotube (CNT) the best promising candidate material for thermally conductive composites. However, the thermal conductivities of polymer/CNT nanocomposites are relatively low compared with expectations from the intrinsic thermal conductivity of CNTs. The 2 challenge primarily comes from the large interfacial thermal resistance between the CNT and the surrounding polymer matrix, which hinders the transfer of phonon dominating heat conduction in polymer and CNT. This article reviews the status of worldwide research in the thermal conductivity of CNTs and their polymer nanocomposites. The dependence of thermal conductivity of nanotubes on the atomic structure, the tube size, the morphology, the defect and the purification is reviewed. The roles of particle/polymer and particle/particle interfaces on the thermal conductivity of polymer/CNT nanocomposites are discussed in detail, as well as the relationship between the thermal conductivity and the micro-and nano-structure of the composites.

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Section: Purification and Graphitizationmentioning

confidence: 99%

Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

Han

Fina

2011

Progress in Polymer Science

2,278

1,323

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“…(100) corresponds to a crystal spacing of 2.12 A˚ of ideal 2H graphite structure [29]. It was reported that the intensity of the (002) peak increases for lower alignment of the CNTs [30].…”

Section: Page 8 Of 16mentioning

confidence: 99%

Fabrication and characterization and biosensor application of gold nanoparticles on the carbon nanotubes

Ghodselahi

Aghababaie

Mobasheri

et al. 2015

Applied Surface Science

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“…Alternative methods for CNT synthesis without metal catalyst should be developed to meet these practical demands. Recently, a few techniques of catalyst‐free CNT synthesis have been reported . These methods suffer from several disadvantages; a dramatically low synthesis yield, a high (above 1400 °C) synthesis temperature, and the requirement of expensive SiC substrates …”

Section: Introductionmentioning

confidence: 99%

Growth of a Carbon Nanotube Forest on Silicon using Remote Plasma CVD

Исмагилов

Shvets

Zolotukhin

2013

Chemical Vapor Deposition

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CVD enhanced by remote plasma is applied to produce carbon film material on silicon substrates. The layers of aligned multiwall carbon nanotubes (MWCNT) are obtained without a metal catalyst by deposition from a methane/hydrogen gas mixture activated by a direct current (DC) discharge. The individual MWCNTs in the films consist of 4-7 concentric carbon shells with a spacing of 0.34 nm. An absence of metallic impurities in the MWCNT film material is confirmed using energy dispersive X-ray (EDX) and electron energy loss spectroscopy (EELS) analyses. A proposed model explains the formation of the cylindrical seeds of the MWCNTs via condensation of carbon atoms from the activated gaseous environment on the inner surfaces of pores, created in the substrate material as a result of silicon etching by ionized hydrogen, generated in the DC discharge plasma. Further growth of these seeds during the CVD process leads to the formation of MWCNT forests.

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Catalyst free synthesis of high-purity carbon nanotubes by thermal plasma jet

Cited by 25 publications

References 12 publications

Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

Fabrication and characterization and biosensor application of gold nanoparticles on the carbon nanotubes

Growth of a Carbon Nanotube Forest on Silicon using Remote Plasma CVD

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