The effect of high-temperature annealing on the structure and electrical properties of well-aligned carbon nanotubes

Gong, Qianming; Li, Zhi; Wang, Ye; Wu, Bin; Zhang, Zhengyi; Ji, Liang

doi:10.1016/j.materresbull.2006.06.023

Cited by 77 publications

(30 citation statements)

References 15 publications

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“…2θ = 26.1 • , originated from the crystalline nature of graphite. Basically, the interlayer distance, d 002 , is close to 0.335 nm for highly oriented graphite carbon [15]. The d 002 value of fresh MCMB is approximately 0.337 nm according to the calculation of Bragg's equation.…”

Section: Resultsmentioning

confidence: 86%

Dye-Sensitized Solar Cells Using Mesocarbon Microbead-Based Counter Electrodes

Hsieh

Yang

Chen

2012

International Journal of Photoenergy

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The dye-sensitized solar cells (DSCs) equipped with mesocarbon microbead (MCMB)-based counter electrodes were explored to examine their cell performance. Three types of nanosized additives including platinum, carbon nanotubes (CNTs), and carbon black (CB) are well dispersed and coated over microscaled MCMB powders. In the design of the counter electrodes, the MCMB graphite offers an excellent medium that allows charge transfer from the ITO substrate to the dye molecule. The active materials such as Pt, CNT, and nanosize CB act as an active site provider for the redox reaction. Among these counter electrodes, the DSCs fabricated with CB electrode exhibit the highest power conversion efficiency. This improved efficiency can be attributed to the fact that the CB nanoparticles not only offer a large number of catalytic sites but also low charge transfer resistance, facilitating a rapid reaction kinetics. Such design of carbon counter electrode has been confirmed to be a promising candidate for replacing Pt electrodes.

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Section: Resultsmentioning

confidence: 86%

Dye-Sensitized Solar Cells Using Mesocarbon Microbead-Based Counter Electrodes

Hsieh

Yang

Chen

2012

International Journal of Photoenergy

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“…According to the previous report, high quality graphene was usually prepared by capping the carbon source on a planar catalyst film [16,17]. In the previous studies, as-prepared nanoparticles are often used for the high-quality carbon nanotube synthesis [42,43]. For comparison, nickel nanoparticles (less than 100 nm) were used as catalysts for the synthesis of carbon namomaterial in our work.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of graphene by pyrolysis of poly(methyl methacrylate) on nickel particles in the confined microzones

Nie

Yang

Bao

et al. 2012

Materials Research Bulletin

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“…The temperature reading was monitored and recorded by using an array of five thermocouples (K-type, accuracy: 0.1 • C): one was located at the heater, three at the heat sink, and one for measuring the ambient temperature. The apparent k values of the heat sink could be determined by using Fourier's law, based on one-dimensional heat conduction [15]. The k values were determined by comparing the temperature drops across the heat sink, followed by the calculations of Fourier's law.…”

Section: Methodsmentioning

confidence: 99%

Thermal Transport on Graphene-Based Thin Films Prepared by Chemical Exfoliations from Carbon Nanotubes and Graphite Powders

Xie

Zhang

2017

Coatings

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Thermal conductivities (k) of different graphene nanosheet (GN)-based heat sinks are investigated within the temperature range of 323-423 K. One-and two-step modified Hummers' methods are adopted to chemically exfoliate GNs from two kinds of carbon precursors: carbon nanotubes (CNTs) and graphite powders. The two-step method offers an improved exfoliation level of GN products, especially for the CNT precursor. Experimental results show that the GN-based heat sink-exfoliated from graphite powders after the two-step approach-delivers an enhanced k value to 2507 W/m K at 323 K, as compared to the others. The k value is found to be a decreasing function of the porosity of the heat sink, revealing the importance of solid/void fraction (i.e., volumetric heat capacity). The improved thermal efficiency mainly originates from the long phonon mean free path and the low void fraction of GN-based heat sinks, thus inducing highly efficient thermal transport in the GN framework.

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The effect of high-temperature annealing on the structure and electrical properties of well-aligned carbon nanotubes

Cited by 77 publications

References 15 publications

Dye-Sensitized Solar Cells Using Mesocarbon Microbead-Based Counter Electrodes

Dye-Sensitized Solar Cells Using Mesocarbon Microbead-Based Counter Electrodes

Facile synthesis of graphene by pyrolysis of poly(methyl methacrylate) on nickel particles in the confined microzones

Thermal Transport on Graphene-Based Thin Films Prepared by Chemical Exfoliations from Carbon Nanotubes and Graphite Powders

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