Morphology of the growth tip of carbon microcoils/nanocoils

Yang, Shihao; Chen, X.; Motojima, Seiji

doi:10.1016/j.diamond.2004.06.014

Cited by 31 publications

(20 citation statements)

References 11 publications

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“…All of these growth modes strongly depend on catalyst and reactive gas compositions. [16]; (b) bidirectionally grown twisted carbon filaments (b-TCFs) [17]; (c) tip grown single helical carbon filaments (t-SHCFs) [18]; and (d) tip grown twisted carbon filaments (t-TCFs) [18]. Reprinted with permission from [16][17][18], Copyright 1999 AIP Publishing LLC, Copyright 2004 Elsevier, and Copyright 2010 Elsevier.…”

Section: Open Accessmentioning

confidence: 99%

“…Figure 1 illustrates the different varieties of coiled carbon filaments that have been synthesized over the years. Based on growth mode, coiled carbon filaments can be classified into three groups: (1) bidirectionally grown double helical carbon filaments (b-DHCFs) [16]; (2) bidirectionally grown twisted carbon filaments (b-TCFs) [17]; and (3) tip grown single helical carbon filaments (t-SHCFs) [18] or tip grown twisted carbon filaments (t-TCFs) [18]. Structurally, some t-SHCFs and t-TCFs can have hollow cores like multi-walled carbon nanotubes (MWCNTs) [19].…”

Section: Open Accessmentioning

confidence: 99%

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Growth and Properties of Carbon Microcoils and Nanocoils

2014

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Abstract:Various types of coiled carbon filaments have been synthesized using chemical vapor deposition and other methods. These carbon filaments exhibit unique electrical and mechanical properties due to their versatile shapes and structures. To form coiled shapes, different types of catalyst compositions and reactive gases have been explored. Generally, coiled carbon filaments are classified by coil diameter and shape (e.g., microcoil and nanocoil). In this review, coiled carbon filaments are classified into three growth mechanism categories: (1) bidirectional double helical growth; (2) bidirectional twisted growth; and (3) tip single helical or twisted growth. Next, their synthesis methods and hypothetical growth mechanisms are discussed. Then, their electrical and mechanical properties are listed. Finally, potential applications and uses of coiled carbon filament are mentioned.

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Section: Open Accessmentioning

confidence: 99%

Section: Open Accessmentioning

confidence: 99%

Growth and Properties of Carbon Microcoils and Nanocoils

2014

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“…In recent years, carbon materials have attracted considerable attention because of their novel morphologies and specially physical and chemical properties, such as fullerenes, 6 hollow and solid spheres, [7][8][9][10][11][12][13] nanotubes, [14][15][16][17][18] onions, [19][20][21] nanorods and nanocoils. 22 Among these, carbon spheres are becoming increasingly important due to their promising applications in the fields of medicine, pharmaceutics, material science and paint industry.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Structurally Novel Carbon Micro/ Nanospheres by Low Temperature-Hydrothermal Process

Krishnamurthy

Namitha

2013

J. Chil. Chem. Soc.

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Carbon spheres with two to four attached lobes having axial, trigonal and tetrahedral morphology were synthesized at considerably low temperature of 200 °C by a hydrothermal reaction. The source of carbon used was sucrose in sulfuric acid medium. The product obtained was characterized by X-ray diffraction, Fourier transforms infrared and Raman spectroscopy, which have inferred us the graphitic nature of the product. Further Scanning and Transmission electron microscopic studies have revealed the spheres having attractive morphology with attached lobes and nodes like structures. The carbon spheres are having the size ranging from 200 nm to 4 µm. The spheres are solid balls exhibiting metallic luster. They possess surface area and pore volume of 2.956 m 2 g -1 and 0.616 x 10 -2 cm 3 g -1 respectively as obtained from Brunauer-Emmett-Teller method. The yield product obtained was about 70-80 %.

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“…The CNR has a shape with multistrings twisted together. The HCNF has been synthesized and studied since the 1970s [4][5][6][7][8][9][10][11][12][13][14][15]. The CNC and CNTw relatively have good reproducibility, but CNR has been seldom seen.…”

Section: Introductionmentioning

confidence: 99%

“…So far, various catalysts have been tried. For example, for CNC, Ni [4], Fe-ITO [8], Cu-(Ni, Cr, Ti or Zn) [9], Au [10], Fe-SnO 2 [11,12], and Febased alloys (Fe-Cr-Mn-Mo, Fe-Cr-Ni-Mo (SUS513)) [13] have been tried, while for CNTw, Ni [4], Ni-Cu [3], Cu [14], and Fe-based alloys (Fe-Ni-Cr-Mo-Mn-Sn) [15] have been used. Compared with CNC, the CNTw has been able to be prepared in almost 100% purity with high uniformity of fiber diameter and shape [3].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Powdery Carbon Nanotwist and Application to Printed Field Emitter

Hosokawa

Shiki

Shinohara

et al. 2007

Research Letters in Materials Science

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In the present study, an automatic production system with sequencer control for the synthesis of carbon nanofibriform based on catalytic CVD using a substrate was developed. The carbon nanotwist (CNTw), which is one of the helical carbon nanofibers, was then synthesized in powdery form with an Ni-SnO 2 -composed catalyst. The production rate was 5 400 times that of the conventional CVD system and Ni-Cu-In 2 O 3 catalyst. The powdery CNTw was easily scraped off the substrate, then pasted with organic binder, and printed by a squeegee method on ITO glass substrate for an electron field emitter. The field emission performance was found to be better than that of the directly grown CNTw film in conventional CVD with Ni-Cu catalyst.

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Morphology of the growth tip of carbon microcoils/nanocoils

Cited by 31 publications

References 11 publications

Growth and Properties of Carbon Microcoils and Nanocoils

Growth and Properties of Carbon Microcoils and Nanocoils

Synthesis of Structurally Novel Carbon Micro/ Nanospheres by Low Temperature-Hydrothermal Process

Preparation of Powdery Carbon Nanotwist and Application to Printed Field Emitter

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