Annealing effect on disordered multi-wall carbon nanotubes

Kim, Yoong Ahm; Hayashi, T.; Osawa, Kozo; Dresselhaus, M. S.; Endo, Morinobu

doi:10.1016/j.cplett.2003.09.027

Cited by 111 publications

(85 citation statements)

References 12 publications

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“…This splitting is based on a transformation into a graphitic structure and the formation of defects in the formed sp 2 layers. Wehreas, the G'-peak describes the three-dimensional order of the graphitic sp 2 layers [25]. Behler et al (2006) interpreted the shift of the G peak to ~1581 cm -1 during the graphitization process with the increasing graphitic arrangement of the carbon lattices in MWCNTs, which correlates with the theoretical position in graphite [28].…”

Section: Analysis Methodssupporting

confidence: 52%

“…Furthermore, several groups showed that a temperature treatment of carbon structures results in a reorientation of the graphitic layers. Raman spectroscopy is an effective technique of measuring this structural change [25,26,28,29]. However, there are no comprehensive studies on the graphitization process and the influence of temperature.…”

Section: Introductionmentioning

confidence: 99%

“…These defects reduce the mechanical [22,23] as well as the electrical [24] properties of carbon structures. The high temperature annealing of carbon structures especially of carbon nanotubes is a powerful tool to heal structural defects [25]. Several groups investigated the influence of the annealing on the morphology and improvement of properties of CNTs [26] or Graphene [27].…”

Section: Introductionmentioning

confidence: 99%

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Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Marx¹,

Beisch²,

Garlof³

et al. 2017

Adv Mater Sci

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The manufacturing of a 3D interconnected globular carbon foam, called Globugraphite, is based on the replication of the zinc oxide (ZnO) template morphology by carbon with simultaneous removing of the template material in the chemical vapour deposition (CVD -replica CVD (rCVD)) process. The growth mechanism of the presented carbon foam affected the formation of defects at the atomic level which leads in the following to graphitic pieces instead of layers. This substructure influences properties, such as electrical conductivity of the carbon foam negatively. By undergoing a temperature treatment at 1600°C, 1800°C, 2000°C and 2200°C in a protective gas atmosphere the carbon structure heals at the atomic level. The connection of the sp 2 /sp 3 graphitic pieces to graphitic sp 2 layers due to the thermal annealing is analysed via transmission electron microscopy (TEM) observation and Raman spectroscopy. Based on these analysis methods a model of the graphitization progress is created which explains the clearly increase of the electrical conductivity and the oxidation temperature.

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Section: Analysis Methodssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Marx¹,

Beisch²,

Garlof³

et al. 2017

Adv Mater Sci

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“…30 3 (k)). This kind of morphological change is often seen at the tip of thermally treated nanotubes, [42][43][44] because the facetted structure is energetically more stable at high temperatures. Raman spectra on the different samples were recorded using four laser lines (488, 514.5, 633 and 785 nm) (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…This heat treatment appears to be a powerful tool for improving their structural integrity, and could effectively remove 35 trapped metallic impurities, particularly Fe below 20 ppm. [42][43][44] In this particular study, as-grown N-MWNTs were thermally treated in argon at temperatures between 1000 °C and 2000 °C, using a graphite furnace. In order to understand the structural and electrical transport changes within our N-doped MWNTs, we measured the electrical 45 resistivity in the bulk state using a four-point probe method ( Fig.…”

Section: Methodsmentioning

confidence: 99%

Enhanced electrical conductivities of N-doped carbon nanotubes by controlled heat treatment

et al. 2011

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Nanotubes

Vengatesan¹,

Varghese²,

Mittal³

2017

Kirk-Othmer Encyclopedia of Chemical Technology

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Nanotubes are one‐dimensional tubular nanomaterial having a great length to diameter ratio. The substantial research interest of nanotubes for miscellaneous applications is triggered from their unusual and superlative properties. This article narrates the different types of nanotubes and their synthesis and applications. The techniques used to modify various nanotubes properties and thus its performances for various applications are also discussed. Nanotubes have been incorporated with a number of inorganic and organic materials and then used in diverse applications such as sensors, biomedical, energy storage, environmental, and engineering. The presence of tubular structure, large aspect ratio and surface area, porous nature, chemical inertness, and enhanced mechanical and thermal properties are the highlights of nanotubes for vast acceptance in broad range of applications.

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Annealing effect on disordered multi-wall carbon nanotubes

Cited by 111 publications

References 12 publications

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Enhanced electrical conductivities of N-doped carbon nanotubes by controlled heat treatment

Nanotubes

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