A comparison between Raman spectroscopy and surface characterizations of multiwall carbon nanotubes

Delhaès, P.; Couzi, M.; Trinquecoste, M.; Dentzer, Joseph; Hamidou, H.; Vix‐Guterl, Cathie

doi:10.1016/j.carbon.2006.05.021

Cited by 235 publications

(140 citation statements)

References 25 publications

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“…2.0 for PR24-LHT and PR24-LHT oxidized 2 h to 1.2 for the sample oxidized for 10 h. Whereas the D band in the Ra man spectrum originates from the edges of the graphene sheets, the 2D band seems to be linked to structural defects existing within the graphene sheets, i.e. its intensity increases when the structure of the sheet approaches the ideal structure existing in graphite [51,84]. This also explains why a correlation was found between the intensity of 2D band and the intensity of the C1s peak in XPS (see XPS section).…”

Section: Temperature Programmed Oxidationmentioning

confidence: 92%

“…It is generally accepted that the Raman spectrum of carbon nanomaterials present 3 first-order bands in the 1000-3000 cm -1 region: a D band at ~1350 cm -1 , a G band at ~1580 cm -1 with a shoulder at ~1620 cm -1 (D' band) [83,84]. The G band corresponds to the in-plane Raman vibration mode of graphite and is characteristic of the ideal graphitic lattice vibration mode, while the D and D' bands are attributed to lattice defects and finite graphene sheets occurring inside a CNT wall [51,83,84]. The first overtone of the D band (2D band) is found at ~2710 cm -1 .…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…The latter samples show a decrease in the width of the D, G and 2D bands with increasing degree of graphitization. Delhaes et al correlated the line width with the length of straight graphene sheets [51]. They proposed that the line width decreases when CNTs are graphitized at high temperature and that the graphene sheets are straightening out.…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…Now that these materials exist, they need to be systematically characterized and their structure needs to be understood [49]. It is worth noting that only few extended characterizations of carbon nanotubes, for which data was analyzed in depth, can be found in the literature [51].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the structure and chemical properties of some commercial carbon nanostructures

Tessonnier

Rosenthal

Hansen

et al. 2009

Carbon

316

256

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For many years the scientific community has believed in a promising future for carbon nanotubes for various applications in such diverse fields as polymer reinforcement, adsorption, catalysis, electronics and medicine. Industrial production of carbon nanotubes and -fibers and the subsequent availability and decrease of price, have rendered this vision feasible. In the last years, several carbon nanomaterial products have been marketed by major chemical companies. In this work, we present an extensive characterization of a representative set of commercially available carbon nanomaterials. Special focus has been put on their quality, i.e. presence of metal or carbonaceous impurities but also homogeneity and structural integrity. The observations are of importance for subsequent use in catalysis where the presence of impurities or defects in the nanostructure can dramatically modify the activity of the catalytic material..

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Section: Temperature Programmed Oxidationmentioning

confidence: 92%

Section: Raman Spectroscopymentioning

confidence: 99%

Section: Raman Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the structure and chemical properties of some commercial carbon nanostructures

Tessonnier

Rosenthal

Hansen

et al. 2009

Carbon

316

256

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“…Uniform dispersion of CNTs in the matrix caused the increase of the composite hardness compared to the unreinforced aluminium alloy. It has been observed that during the mechanical milling of CNTs with aluminium alloy powder, the CNTs are damaged to some extent [12,13].…”

mentioning

confidence: 99%

Effect of Milling Time on Microstructure and Properties of AA6061/MWCNTS Composite Powders / Wpływ Czasu Mielenia Na Strukturę I Własności Proszk Ów Kompozytowyc H AA6061/MWCNTS

Tomiczek¹,

Dobrzański²,

Macek³

2015

Archives of Metallurgy and Materials

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The main purpose of this work is to determine the effect of milling time on microstructure as well as technological properties of aluminium matrix nanocomposites reinforced with multi-walled carbon nanotubes (MWCNTs) using powder metallurgy techniques, including mechanical alloying. The main problem of the study is the agglomeration and uneven distribution of carbon nanotubes in the matrix material and interface reactivity also. In order to reach uniform dispersion of carbon nanotubes in aluminium alloy matrix, 5÷20 h of mechanical milling in the planetary mill was used. It was found that the mechanical milling process has a strong influence on the characteristics of powders, by changing the globular morphology of as-received powder during mechanical milling process to flattened one, due to particle plastic deformation followed by cold welding and fracturing of deformed and hardened enough particles, which allows to obtain equiaxial particles again. The obtained composites are characterised by the structure of evenly distributed, disperse reinforcing particles in fine grain matrix of AA6061, facilitate the obtainment of higher values of mechanical properties, compared to the initial alloy. On the basis of micro-hardness, analysis has found that a small addition of carbon nanotubes increases nanocomposite hardness.

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Vibrational Properties

2013

Carbon‐based Solids and Materials

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A comparison between Raman spectroscopy and surface characterizations of multiwall carbon nanotubes

Cited by 235 publications

References 25 publications

Analysis of the structure and chemical properties of some commercial carbon nanostructures

Analysis of the structure and chemical properties of some commercial carbon nanostructures

Effect of Milling Time on Microstructure and Properties of AA6061/MWCNTS Composite Powders / Wpływ Czasu Mielenia Na Strukturę I Własności Proszk Ów Kompozytowyc H AA6061/MWCNTS

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