Growth of bridging carbon nanofibers in cracks formed by heat-treating iron oxide thin sheets in acetylene gas

Hikata, Takeshi; Okubo, Soichiro; Higashi, Yugo; Matsuba, Teruaki; Utsunomiya, Risa; Tsurekawa, Sadahiro; Murakami, Katsuhisa; Fujita, Jun

doi:10.1063/1.4802966

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AIP Advances

2013

DOI: 10.1063/1.4802966

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Growth of bridging carbon nanofibers in cracks formed by heat-treating iron oxide thin sheets in acetylene gas

Takeshi Hikata

Soichiro Okubo

Yugo Higashi

et al.

Abstract: We produced novel carbon nanofibers (CNFs) by oxidizing high-purity iron foil and then carburizing it in acetylene gas flow. This formed cracks in the heat-treated iron foil with CNFs bridging the two walls of each crack. The CNFs were drawn out from the walls as the crack opened during heat treatment. This will be a new method to grow and arrange carbon nanotubes and nanosheets without using metal nanoparticles or template substrates

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Cited by 3 publications

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Fe- or Fe oxide-embedded anodic alumina membrane for nanocarbon growth―fabrication of membrane and observation of initial nanocarbon growth

Kondoh

Tamekuni

Watanabe

et al. 2017

Microelectronic Engineering

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Fe- or Fe oxide-embedded anodic alumina membrane for nanocarbon growth―fabrication of membrane and observation of initial nanocarbon growth

Kondoh

Tamekuni

Watanabe

et al. 2017

Microelectronic Engineering

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Growth of bridging carbon nanofibers in cracks formed by heat-treating iron oxide thin sheets in acetylene gas

et al. 2013

View full text Add to dashboard Cite

We produced novel carbon nanofibers (CNFs) by oxidizing high-purity iron foil and then carburizing it in acetylene gas flow. This formed cracks in the heat-treated iron foil with CNFs bridging the two walls of each crack. The CNFs were drawn out from the walls as the crack opened during heat treatment. This will be a new method to grow and arrange carbon nanotubes and nanosheets without using metal nanoparticles or template substrates

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Fabrication of high-strength carbon nanotube bundles using iron oxides co-assisted chemical vapor deposition

Fujimori

Matsuo

Masuda

et al. 2019

Applied Physics Letters

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We report the fabrication of centimeter-long, defect-free, and parallel-aligned single-wall carbon nanotubes (SWCNTs) using a laboratory-designed two-step catalytic chemical vapor deposition method. Our in situ mass spectral analysis reveals that the initial stainless-derived iron oxide block decomposes methane into acetylene and ethylene, subsequently promoting the growth of high-purity SWCNTs on the second pigment-derived iron oxide fine powders dispersed on the Si/SiO2 substrate. Raman spectral imaging shows the negligible defect-induced D-band in the resulting sample, indicating the highly crystalline structure of SWCNTs. By using a gas-flow-type mechanical test system, an SWCNT bundle containing 20 components of individual SWCNTs exhibits the tensile strength over 50 GPa. Since the catalysts used in this study are widely available on the industrial scale, our iron oxide coassisted method will lead to the scalable production of high-strength SWCNT bundles.

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Growth of bridging carbon nanofibers in cracks formed by heat-treating iron oxide thin sheets in acetylene gas

Cited by 3 publications

References 31 publications

Fe- or Fe oxide-embedded anodic alumina membrane for nanocarbon growth―fabrication of membrane and observation of initial nanocarbon growth

Fe- or Fe oxide-embedded anodic alumina membrane for nanocarbon growth―fabrication of membrane and observation of initial nanocarbon growth

Growth of bridging carbon nanofibers in cracks formed by heat-treating iron oxide thin sheets in acetylene gas

Fabrication of high-strength carbon nanotube bundles using iron oxides co-assisted chemical vapor deposition

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