Electron spectroscopy of carbonaceous materials

Smith, Graham C.; Shuff, P.J.

doi:10.1016/0169-4332(96)00517-x

Cited by 12 publications

(2 citation statements)

References 12 publications

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“…In our case ⌬ = 9.6 eV, which is compatible with a 75:25 sp 2 / sp 3 hybridization ratio. 19 A related, alternative, way of determining the hybridization ratio is to measure the difference in energy between the most positive incursion and the most negative incursion of the derivative of the C KVV Auger spectrum ͑parameter 18,21 ␦͒. In the present case ␦ = 19.7 eV, which is again compatible with a 75:25 sp 2 / sp 3 hybridization ratio.…”

Section: X-ray Photoemission Spectroscopy Nmr and Raman Analysismentioning

confidence: 50%

Structure of carbon nanospheres prepared by chlorination of cobaltocene: Experiment and modeling

Katcho¹,

Zetterström²,

Lomba³

et al. 2008

Phys. Rev. B

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With the concourse of a variety of experimental techniques ͑neutron diffraction, x-ray photoelectron spectroscopy, 13 C nuclear magnetic resonance, electron microscopy, and Raman spectroscopy͒ and a combination of reverse Monte Carlo, molecular dynamics, and Monte Carlo simulations, we propose a model for the microscopic structure of a sample of carbon nanospheres obtained from chlorination of cobaltocene. The sample, which exhibits a high porosity, is shown to be formed by a series of interconnected sheets of graphene. Despite the large degree ͑Ϸ80%͒ of sp 2 hybridization shown by carbon atoms, there is a non-negligible amount of sp 3 -bonded carbons, some of them acting as links between graphene sheets. The transmission electron microscopy images simulated from the microscopic structure, which is extracted from the neutron diffraction data by a mixed reverse Monte Carlo-molecular dynamics/Monte Carlo procedure, agree remarkably well with the experimental results.

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Section: X-ray Photoemission Spectroscopy Nmr and Raman Analysismentioning

confidence: 50%

Structure of carbon nanospheres prepared by chlorination of cobaltocene: Experiment and modeling

Katcho¹,

Zetterström²,

Lomba³

et al. 2008

Phys. Rev. B

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“…2) revealed that the DLC contained very little graphitic material within the surface layer probe by XPS and is mostly sp 3 bonded, i.e. tetrahedral coordination [10].…”

Section: Dlc Coatingsmentioning

confidence: 99%

Friction and wear performance of diamond-like carbon and Cr-doped diamond-like carbon coatings in contact with steel surfaces

Renondeau

Taylor

Smith

et al. 2008

Proceedings of the Institution of Mechanical Engineers, Part J:

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The development of modern engines involves the use of new materials such as diamond-like carbon (DLC) coatings. As these coatings possess different mechanical and physical characteristics to steel, investigation of their friction and wear properties when rubbing against a steel counterpart in a lubricated environment is needed. Specific tests were used to assess the tribological behaviour of these new surfaces (specifically an undoped DLC and a chromium-doped DLC coating). Chemical analyses were also performed in order to evaluate the reactivity of the formulated oil on the various surfaces. The results of the present work clearly show that there was no evidence of tribochemical reaction on DLC coatings. Anti-wear additives were still reacting on the steel counterpart for the undoped DLC case, resulting in better wear properties for the coating. The addition of a metal to the amorphous carbon matrix led to an improvement in wear but inhibited/removed the anti-wear film on the steel counterpart.

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Measurement of the relative abundance of sp2 and sp3 hybridised atoms in carbon based materials by XPS: a critical approach. Part I

Speranza

Laidani

2004

Diamond and Related Materials

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Electron spectroscopy of carbonaceous materials

Cited by 12 publications

References 12 publications

Structure of carbon nanospheres prepared by chlorination of cobaltocene: Experiment and modeling

Structure of carbon nanospheres prepared by chlorination of cobaltocene: Experiment and modeling

Friction and wear performance of diamond-like carbon and Cr-doped diamond-like carbon coatings in contact with steel surfaces

Measurement of the relative abundance of sp2 and sp3 hybridised atoms in carbon based materials by XPS: a critical approach. Part I

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