Preparation of Powdery Carbon Nanotwist and Application to Printed Field Emitter

Hosokawa, Yasushi; Shiki, Hajime; Shinohara, Yuichiro; Yokota, Masashi; Takikawa, Hirofumi; Ina, Takashi; Okada, Fumio; Fujimura, Yuko; Yamaura, Tatsuo; Itoh, Shigeo; Miura, Kôji; Yoshikawa, Kazuo

doi:10.1155/2007/59167

Cited by 10 publications

(16 citation statements)

References 14 publications

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“…CNCs were synthesized using an automatic chemical vapor deposition system with a consecutive substrate transfer mechan- 22,23 In the typical process, 0.2 mL Fe-Sn catalytic solution was dropped onto a graphite substrate of diameter 100 mm. Subsequently, the substrate was calcined at 350°C for 8 min.…”

Section: Synthesis Of Carbon Nanomaterialsmentioning

confidence: 99%

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

et al. 2015

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The application of a microporous layer (MPL) between the gas diffusion layer and the catalyst layer (CL) plays a crucial role in the performance of the direct methanol fuel cell (DMFC). To this end, this study investigates the effects of carbon loading and the nature of the carbon material used in the anode MPL on the performance of DMFC using transmission and scanning electron microscopy, polarization technique, and electrochemical impedance spectroscopy (EIS). DMFC was indigenously fabricated using 30 wt% PtRu catalyst supported on carbon nanocoil and commercial Pt catalyst as the anode CL and the cathode CL, respectively. Carbon nanoballoon (CNB) and Vulcan XC-72R (Vulcan) were used as the anode MPL. According to polarization studies, a membrane electrode assembly (MEA) with CNB and Vulcan MPLs (loading of 1.5 mg cm −2 ) shows higher power density. This is 1.3 and 1.8 times higher than that without the anode MPL when methanol concentration was 0.5 M (M = mol dm −3 ), respectively. Electrochemical impedance spectra (EIS) results indicate that the MEAs with the anode MPLs have lower highfrequency resistance and charge transfer resistance when compared to those without the anode MPL. Thus, it can be realized that the anode MPL plays a significant role in the effective utilization of CNC-supported PtRu anode catalyst, thereby improving DMFC performance.

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Section: Synthesis Of Carbon Nanomaterialsmentioning

confidence: 99%

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

et al. 2015

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“…Figure 13 shows a schematic illustration of the automatic CVD apparatus developed in our laboratory. The details of this apparatus are described elsewhere [47,48]. …”

Section: Cvd Conditionsmentioning

confidence: 99%

High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst

et al. 2015

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Carbon nanocoil (CNC), which is synthesized by a catalytic chemical vapor deposition (CCVD) method, has a coil diameter of 300-900 nm and a length of several tens of μm. Although it is very small, CNC is predicted to have a high mechanical strength and hence is expected to have a use in nanodevices such as electromagnetic wave absorbers and field emitters. For nanodevice applications, it is necessary to synthesize CNC in high yield and purity. In this study, we improved the conditions of catalytic layer formation and CCVD. Using optimized CVD conditions, a CNC layer with a thickness of >40 μm was grown from a SnO2/Fe2O3/SnO2 catalyst on a substrate, and its purity increased to 81% ± 2%.

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“…Based on the experimental results of HCNF growth using the CVD apparatus, Prof. Takikawa developed an automatic CVD system with a consecutive substrate transfer mechanism for mass production of HCNFs (Hosokawa et al, 2007). Schematic of the CVD system is shown in Figure 2.…”

Section: Development Of Automatic Cvd System For Mass Productionmentioning

confidence: 99%

Syntheses and Electronic Applications of Helical Carbon Nanofibers

Suda¹,

Takikawa²,

Tanoue³

2011

Carbon Nanotubes Applications on Electron Devices

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Preparation of Powdery Carbon Nanotwist and Application to Printed Field Emitter

Cited by 10 publications

References 14 publications

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst

Syntheses and Electronic Applications of Helical Carbon Nanofibers

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