Surface analysis of CVD carbon using NEXAFS, XPS and TEM

Kikuma, Jun; Yoneyama, Koji; Nomura, Masaharu; Konishi, Tokuzo; Hashimoto, T.; Mitsumoto, R.; Ohuchi, Yuko; Seki, Kazuhiko

doi:10.1016/s0368-2048(97)00220-x

Cited by 25 publications

(16 citation statements)

References 12 publications

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“…In NEXAFS spectroscopy information about the unsaturated carbon species is obtained more easily than in XPS, because the p* resonance at about 284.4 eV [3] is a semi-quantitative measure for the presence of p electrons [9,10] as Csp 2 and Csp species. Besides the surface sensitive application of XPS and X-ray absorption spectroscopy, which is suitable for describing surface properties such as adhesion, several spectromicroscopic techniques are available for gaining information about changes in the cross section or the lateral heterogeneity of a sample.…”

Section: Research Newsmentioning

confidence: 99%

Analysis of Carbon Materials by X‐ray Photoelectron Spectroscopy and X‐ray Absorption Spectroscopy

Retzko¹,

Unger²

2003

Adv Eng Mater

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Since hard coating such as ta:C films are of growing interest for protecting surfaces of industrial machines and high capacity tools against wear and friction or for biomedical applications, more information about the structure‐to‐property relation is required. Therefore, core level X‐ray photoelectron sprectroscopy and X‐ray absorption spectroscopy and spectromicroscopy are used to derive chemical information about selected carbon species.

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Section: Research Newsmentioning

confidence: 99%

Analysis of Carbon Materials by X‐ray Photoelectron Spectroscopy and X‐ray Absorption Spectroscopy

Retzko¹,

Unger²

2003

Adv Eng Mater

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“…Two intense peaks ͑p2 and p3͒ are assigned to the C1s-to-* ͑C v C͒ transition and to the C1s-to-* ͑C-H͒ transition, respectively. 12 In contrast, the small peak at 283.8 eV has not been reported yet. The position of the E F can be estimated from the binding energy of C1s x-ray photoelectron spectroscopy ͑XPS͒ spectra ͑not shown here͒ and it is located at 284.0 eV, a little higher than the peak ͑p1͒.…”

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confidence: 92%

Growth of nanographite on Pt(111) and its edge state

Entani

Ikeda

Kiguchi

et al. 2006

Applied Physics Letters

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The nanographite grains, the diameter of which was around 5 nm, were formed on Pt͑111͒ by exposing the Pt͑111͒ substrate to benzene gas at room temperature and annealing it up to 850 K. The increase of relative number of edge atoms enabled the observation of edge-derived electronic states. The measurement of ultraviolet photoelectron spectroscopy and near edge x-ray absorption fine structure on the nanographite revealed the appearance of the edge state located at the Fermi level.

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“…Feature p3 at 287.5 eV observed in nanographite films 26 and carbon thin films 35 was ascribed to the C 1s-σ*(C-H) transition. 26,35 Feature p3 at 287.0 eV observed in graphene sheets with acid treatment 27 was attributed to the CdO bonds incorporated via OH groups in the carbon network. Similarly, the origin of feature p4 is still controversial (see Table 1), because the corresponding peak was observed in the C K-edge XAS spectra of the oxidized pristine graphite (and graphene) 28,29,32 as well as a single-layered graphene.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen Termination on Carbon K-Edge X-ray Absorption Spectra of Nanographene

et al. 2011

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Carbon K-edge X-ray absorption spectra of nanographene have been simulated by density functional theory calculations to obtain information on the edge termination by hydrogen. Such information is crucially important to understand and predict functions such as transport and catalysis. Our results show that different edge terminations significantly affect the binding energy of the 1s core-level of C atoms in the vicinity of edges because of the change in chemical bonding and the localized edge states. We find that a shoulder or a peak appears below the π* peak at relatively different positions with respect to the π* peak position in the theoretical spectra of zigzag graphene nanoribbons, depending on the ratio of monohydrogen- to dihydrogen-terminations. We also point out that the two additional features observed between the π* and σ* peaks of an ideal graphene originate from the σ* states of C−H bonding and C−H2 bonding at the edges.

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Surface analysis of CVD carbon using NEXAFS, XPS and TEM

Cited by 25 publications

References 12 publications

Analysis of Carbon Materials by X‐ray Photoelectron Spectroscopy and X‐ray Absorption Spectroscopy

Analysis of Carbon Materials by X‐ray Photoelectron Spectroscopy and X‐ray Absorption Spectroscopy

Growth of nanographite on Pt(111) and its edge state

Effect of Hydrogen Termination on Carbon K-Edge X-ray Absorption Spectra of Nanographene

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