A study of defects and impurities in doped detonation nanodiamonds by EPR, Raman scattering, and XRD methods

Dolmatov, V. Yu.; Лапчук, Н. М.; Lapchuk, T. M.; Nguyen, Brianna; Myllymäki, V.; Vehanen, A.; Yakovlev, R. Yu.

doi:10.3103/s1063457616040018

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…A broadening of this peak was a found (Figure 7) and is associated with the small crystallite size in DND. Figure 7 a shows that in the background of the peak at 1322 cm −1 there is a peak with a characteris frequency shift at 1350 cm −1 belonging to the D-band with sp 2 -hybrid bonds [56]. The second peak at 1570 cm −1 belongs to the G-band, which is usually positioned 1581 cm −1 for the DND sample.…”

Section: Raman Spectramentioning

confidence: 93%

“…The D and G peaks at 1350 and 1581 cm −1 , respectively, are related to the known A 1g and E 2g modes of the sp 2 -hybrid bond carbon atom vibrations [57]. In addition to the aforementioned peak located at 1570 cm −1 , depending on the parameters of the DND synthesis process, there is another peak located at 1625 cm −1 in the region 1600-1640 cm −1 , which relates to the carbon of the sp 2 -hybrid bonds [56].…”

Section: Raman Spectramentioning

confidence: 95%

“…Other diamond XRD peaks corresponding to the (220) and (311) crystallographic planes were observed at 2θ ~75.3 • and 91.5 • , respectively. Furthermore, reflections corresponding to the (111), ( 220) and (311) crystallographic planes are attributed to the diamond-like lattice with a parameter a 0 = 3.568 ± 0.008 Å [26,56].…”

Section: Raman Spectramentioning

confidence: 99%

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Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

et al. 2022

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This paper presents the results of a study on the preparation and characterization of a Cr-DND/MoN detonation chromium-nanodiamond coating deposited on cemented tungsten carbide (WC–3 wt.% Co) mill blades using Arc-PVD and electrodeposition methods. The physical and mechanical characteristics of the coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), XRD analysis, Raman spectroscopy, micro-identification, and scratch test (evaluation of the coating adhesion). It was shown that the Cr-DND/MoN coating consists of successive layers of Cr-DND (top), Cu (middle) and MoN (bottom) with separate phases of γ-Mo2N, α-Mo, α-Cu, Cr-DND and nanodiamonds. The Cr-DND composite electrochemical coating (CEC) was deposited from the conventional chromium plating electrolyte with the addition of nanodiamonds. The copper interlayer was deposited by the Arc-PVD method on the surface of the MoN coating to improve the adhesion strength of the Cr-DND CEC. The coating showed an optimum microhardness of about 14 ± 1 GPa and good adhesion with a critical load Lc of about 93 N. In addition to the expected experimental results, the coating has high wear resistance, confirmed by scratch tests.

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Section: Raman Spectramentioning

confidence: 93%

Section: Raman Spectramentioning

confidence: 95%

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Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

et al. 2022

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“…Such molecular-sized fluorescent nanodiamonds might be used as ultrasmall non-perturbative fluorescent markers and probes in microscopy and sensing. However colour centres-related luminescent or semiconducting properties of artificial nanodiamonds depends on doping the nanodiamonds19 via desired elements such as nitrogen20 or boron21. Availability of sub-2 nm nanodiamonds would also enable exploration of quantum phenomena in diamond22.…”

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confidence: 99%

High-yield fabrication and properties of 1.4 nm nanodiamonds with narrow size distribution

Stehlík

Varga

Ledinský

et al. 2016

Sci Rep

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Detonation nanodiamonds (DNDs) with a typical size of 5 nm have attracted broad interest in science and technology. Further size reduction of DNDs would bring these nanoparticles to the molecular-size level and open new prospects for research and applications in various fields, ranging from quantum physics to biomedicine. Here we show a controllable size reduction of the DND mean size down to 1.4 nm without significant particle loss and with additional disintegration of DND core agglutinates by air annealing, leading to a significantly narrowed size distribution (±0.7 nm). This process is scalable to large quantities. Such molecular-sized DNDs keep their diamond structure and characteristic DND features as shown by Raman spectroscopy, infrared spectroscopy, STEM and EELS. The size of 1 nm is identified as a limit, below which the DNDs become amorphous.

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“…The XRD pattern also showed peaks corresponding to the (111), (220), and (311) crystallographic planes of bonded synthetic diamond [47,48]. It should be noted that the intensity of the peaks is different from that of the natural diamond peaks [49,50], which we explained by the fact that the crystal lattice of synthetic diamonds could be distorted [50].…”

Section: Phase Analysismentioning

confidence: 78%

Structural and Mechanical Properties of DLC/TiN Coatings on Carbide for Wood-Cutting Applications

Chayeuski

Zhylinski

Kazachenko³

et al. 2023

Coatings

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In this work, the diamond-like carbon and titanium nitride (DLC/TiN) multilayer coatings were prepared on a cemented tungsten carbide substrate (WC—3 wt.% Co) using the cathodic vacuum arc physical vapor deposition (Arc-PVD) method and pulsed Arc-PVD method with a graphite cathode for the deposition of TiN and carbon layers, respectively. The structural and mechanical properties of the prepared coatings were studied, and different techniques, such as scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Raman spectroscopy, and microindentation techniques investigated their microstructure, composition, and phases. The prepared coatings had a multilayer structure with distinct phases of DLC, TiN, and carbide substrate. The potentiodynamic polarization method (PDP) was performed for the DLC/TiN multilayer coatings in 3% NaCl solution to evaluate the corrosion resistance of the prepared coatings. It has been shown that the DLC layer provided the coating with a polarization resistance of 564.46 kΩ. Moreover, it has been demonstrated that the DLC/TiN coatings had a high hardness of 38.7–40.4 GPa, which can help to extend the wood-cutting tools’ life.

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A study of defects and impurities in doped detonation nanodiamonds by EPR, Raman scattering, and XRD methods

Cited by 9 publications

References 14 publications

Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

Preparation and Characterization of the Cr-Nanodiamonds/MoN Coatings with Performant Mechanical Properties

High-yield fabrication and properties of 1.4 nm nanodiamonds with narrow size distribution

Structural and Mechanical Properties of DLC/TiN Coatings on Carbide for Wood-Cutting Applications

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