Effect of external electromagnetic field and bias voltage on the vapor growth, morphology and properties of carbon micro coils

In-Hwang, W.; Chen, Xiuqin; Kuzuya, T.; Kawabe, Kenji; Motojima, Seiji

doi:10.1016/s0008-6223(99)00145-1

Cited by 24 publications

(9 citation statements)

References 15 publications

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“…These helical materials include helical carbon nanotubes [1], silicon carbon nanosprings [2], silica nanosprings [3][4][5], SiC-SiO 2 core-shell nanowires [6], and transition-metal oxide nanofibers such as TiO 2 [7,8]. Motojima et al reported the synthesis of micro-coiled carbon fibers by metal powder-activated pyrolysis of acetylene containing a small amount of H 2 S or thiophene as an impurity [9][10][11][12]. These coils were double-coiled forms in which two fibers entwined with each other such as double helix of a DNA.…”

Section: Introductionmentioning

confidence: 99%

Helical carbon nanofibers with a symmetric growth mode

Qin

Zhang

Cui

2004

Carbon

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Section: Introductionmentioning

confidence: 99%

Helical carbon nanofibers with a symmetric growth mode

Qin

Zhang

Cui

2004

Carbon

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“…The bottom parts of the branched CNTs are normally irregular and the diameter is much large than that produced at 800∼900℃. As we know that thiol is one of the molecules which can be usually used to adjust the growth activity and the structure of CNTs [25,26]. In this experiment, 2∼5% (wt%) thiol (e.g.…”

Section: Resultsmentioning

confidence: 99%

Growth and Formation Mechanism of Branched Carbon Nanotubes by Pyrolysis of Iron(II) Phthalocyanine

et al. 2013

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Abstract:In this letter, a route for synthesizing vertically aligned multi-walled carbon nanotubes (MWCNTs) with branched nanotubes in large area was reported. The branched MWCNTs up to about 30% can be generated by the pyrolysis of iron(II) phthalocyanine in presence of thiol under Ar/H2 at 800∼900℃. The growth mechanism of the branched nanotubes was proposed and the possible reason that thiol enhanced branched nanotubes growth is discussed. The as-prepared samples provide a suitable candidate to investigate the special electrical or thermal properties of CNTs with branched structures further.

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“…In-Hwang et al . examined the effect of external EM field and bias voltage on the growth of carbon coils [ 116 ]. EM field and bias voltage were applied to the reaction tube and substrate, respectively, and significantly affects the growth of carbon coils.…”

Section: Effect Of Experimental Parameters On the Growth Of Hcfsmentioning

confidence: 99%

“…EM field and bias voltage were applied to the reaction tube and substrate, respectively, and significantly affects the growth of carbon coils. Yield of carbon coils with an external EM field and bias voltage were 1.9‒2.0 times higher than that obtained without an EM field and bias voltage [ 116 ]. In addition to this, morphology of carbon coils was also changed using external EM field and bias voltage.…”

Section: Effect Of Experimental Parameters On the Growth Of Hcfsmentioning

confidence: 99%

Synthesis of Helical Carbon Fibers and Related Materials: A Review on the Past and Recent Developments

Raghubanshi

Dikio

2015

Nanomaterials

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Helical carbon fibers (HCFs) have been widely studied due to their unique helical morphology and superior properties, which make them efficient materials for several potential applications. This review summarizes the past and current advancement on the synthesis of HCFs. The review focuses and discusses synthesis strategies and effect of experimental parameters on the growth of HCFs. The effect of preparation method of catalyst, catalyst nature, catalyst composition, catalyst size, catalyst initial and final shape, reaction temperature, reaction time, carbon source, impurities, and electromagnetic field on the growth of HCFs is reviewed. We also discuss the growth mechanism for HCFs and the synthesis of HCFs related materials. Finally, we conclude with a brief summary and an outlook on the challenges and future prospects of HCFs.

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Effect of external electromagnetic field and bias voltage on the vapor growth, morphology and properties of carbon micro coils

Cited by 24 publications

References 15 publications

Helical carbon nanofibers with a symmetric growth mode

Helical carbon nanofibers with a symmetric growth mode

Growth and Formation Mechanism of Branched Carbon Nanotubes by Pyrolysis of Iron(II) Phthalocyanine

Synthesis of Helical Carbon Fibers and Related Materials: A Review on the Past and Recent Developments

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