Soft X-ray absorption and emission characterization of nanodiamond prepared by explosive detonation

Hamilton, Tracy P.; Kurmaev, E.Z.; Shamin, S. N.; Detkov, P.; Chukhaeva, S. I.; Moewes, A.

doi:10.1016/j.diamond.2006.07.001

Cited by 14 publications

(8 citation statements)

References 29 publications

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“…The XE spectra, obtained by non-resonant excitation at 320 eV, are constituted of a broad peak at 280.0 eV and a smaller feature at 272.0 eV for both liquid and solid samples, attributed to occupied electronic states with 2p and 2s character, respectively. 22 These features, corresponding to the valence band of NDs, are comparable to previous XES reports on ND thin films 23,24 and no significant differences are observed between ND-sub and ND-mj except for a higher noise level of ND-mj.…”

supporting

confidence: 86%

Valence holes observed in nanodiamonds dispersed in water

et al. 2015

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Colloidal dispersion is essential for most nanodiamond applications, but its influence on nanodiamond electronic properties remains unknown. Here we have probed the electronic structure of oxidized detonation nanodiamonds dispersed in water by using soft X-ray absorption and emission spectroscopies at the carbon and oxygen K edges. Upon dispersion in water, the π* transitions from sp(2)-hybridized carbon disappear, and holes in the valence band are observed.

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supporting

confidence: 86%

Valence holes observed in nanodiamonds dispersed in water

et al. 2015

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“…However, the synthesis of diamond by the detonation of explosives with a negative oxygen balance in a steel container under vacuum condition was reported in the 1980s [48,49]. There are also some related literatures in recent reports shown two mentioned methods [50][51][52][53][54][55]. Explosive detonation is still widely used; however, the process of the detonator explosion is extremely fast and very complex.…”

Section: Nanodiamond (Nd)mentioning

confidence: 99%

Synthesis, Properties, and Applications of Low-Dimensional Carbon-Related Nanomaterials

Mostofizadeh

Song

et al. 2011

Journal of Nanomaterials

134

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In recent years, many theoretical and experimental studies have been carried out to develop one of the most interesting aspects of the science and nanotechnology which is called carbon-related nanomaterials. The goal of this paper is to provide a review of some of the most exciting and important developments in the synthesis, properties, and applications of low-dimensional carbon nanomaterials. Carbon nanomaterials are formed in various structural features using several different processing methods. The synthesis techniques used to produce specific kinds of low-dimensional carbon nanomaterials such as zero-dimensional carbon nanomaterials (including fullerene, carbon-encapsulated metal nanoparticles, nanodiamond, and onion-like carbons), one-dimensional carbon nanomaterials (including carbon nanofibers and carbon nanotubes), and two-dimensional carbon nanomaterials (including graphene and carbon nanowalls) are discussed in this paper. Subsequently, the paper deals with an overview of the properties of the mainly important products as well as some important applications and the future outlooks of these advanced nanomaterials.

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“…The features observed in the NEXAFS C K-spectra at 285.4 and 291.7 eV correspond to electron transitions from 1s levels to π* and σ* states within the sp 2 -hybridized carbon atoms [49]. Two features at 286 and 287 eV arise from hydrogenated and oxygenated carbon atoms [50]. Contributions by non-diamond carbon were significant in the spectra of Samples 1 and 2 ( Figure 4Ia,b) and minimal in the spectrum of Sample 3 (Figure 4Ic).…”

Section: Resultsmentioning

confidence: 97%

Structure of Diamond Films Grown Using High-Speed Flow of a Thermally Activated CH4-H2 Gas Mixture

et al. 2020

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Diamond films are advanced engineering materials for various industrial applications requiring a coating material with extremely high thermal conductivity and low electrical conductivity. An approach for the synthesis of diamond films via high-speed jet deposition of thermally activated gas has been applied. In this method, spatially separated high-speed flows of methane and hydrogen were thermally activated, and methyl and hydrogen radicals were deposited on heated molybdenum substrates. The morphology and structure of three diamond films were studied, which were synthesized at a heating power of 900, 1700, or 1800 W, methane flow rate of 10 or 30 sccm, hydrogen flow rate of 1500 or 3500 sccm, and duration of the synthesis from 1.5 to 3 h.The morphology and electronic state of the carbon on the surface and in the bulk of the obtained films were analyzed by scanning electron microscopy, Raman scattering, X-ray photoelectron, and near-edge X-ray absorption fine structure spectroscopies. The diamond micro-crystals with a thick oxidized amorphous sp2-carbon coating were grown at a heating power of 900 W and a hydrogen flow rate of 1500 sccm. The quality of the crystals was improved, and the growth rate of the diamond film was increased seven times when the heating power was 1700–1800 W and the methane and hydrogen flow rates were 30 and 3500 sccm, respectively. Defective octahedral diamond crystals of 30 μm in size with a thin sp2-carbon surface layer were synthesized on a Mo substrate heated at 1273 K for 1.5 h. When the synthesis duration was doubled, and the substrate temperature was decreased to 1073 K, the denser film with rhombic-dodecahedron diamond crystals was grown. In this case, the thinnest hydrogenated sp2-carbon coating was detected on the surface of the diamond crystals.

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Soft X-ray absorption and emission characterization of nanodiamond prepared by explosive detonation

Cited by 14 publications

References 29 publications

Valence holes observed in nanodiamonds dispersed in water

Valence holes observed in nanodiamonds dispersed in water

Synthesis, Properties, and Applications of Low-Dimensional Carbon-Related Nanomaterials

Structure of Diamond Films Grown Using High-Speed Flow of a Thermally Activated CH4-H2 Gas Mixture

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