Synthesis of micro- and nanodiamonds by the method of oxy- acetylene combustion flame

Sabitov, S; Mansurov, B. Z.; Medyanova, B. S.; Partizan, G.; Koshanova, A; Merkibayev, Ye; Mansurova, Madina; Lesbayev, B. T.

doi:10.1088/1742-6596/741/1/012023

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…However, no information about the size of the NDs produced by this method was provided, and their presence in the samples was not reliably confirmed. 55 In yet another variation of torch synthesis, transmission electron microscopy (TEM) analysis of the particles filtered from a common candle flame through a nanoporous alumina membrane detected 2−5 nm NDs surrounded by layers of graphitic carbon and embedded into amorphous carbon matrix. 56 Another exciting opportunity to produce NDs would be the direct assembly of diamondoid molecules into larger diamond structures (Figure 3a,b).…”

Section: Nondetonation Synthesis and Growth Of Diamondmentioning

confidence: 99%

“…The NDs were identified by SEM and Raman spectroscopy by sharp peaks at 1334–1342 cm –1 assigned as diamond peaks up-shifted due to stress caused by the mismatch of the diamond crystal lattice and the structure of the substrate. However, no information about the size of the NDs produced by this method was provided, and their presence in the samples was not reliably confirmed . In yet another variation of torch synthesis, transmission electron microscopy (TEM) analysis of the particles filtered from a common candle flame through a nanoporous alumina membrane detected 2–5 nm NDs surrounded by layers of graphitic carbon and embedded into amorphous carbon matrix …”

Section: Nondetonation Synthesis and Growth Of Diamondmentioning

confidence: 99%

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Ultrasmall Nanodiamonds: Perspectives and Questions

et al. 2022

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Nanodiamonds are at the heart of a plethora of emerging applications in areas ranging from nanocomposites and tribology to nanomedicine and quantum sensing. The development of alternative synthesis methods, a better understanding, and the availability of ultrasmall nanodiamonds of less than 3 nm size with a precisely engineered composition, including the particle surface and atomic defects in the diamond crystal lattice, would mark a leap forward for many existing and future applications. Yet today, we are unable to accurately control nanodiamond composition at the atomic scale, nor can we reliably create and isolate particles in this size range. In this perspective, we discuss recent advances, challenges, and opportunities in the synthesis, characterization, and application of ultrasmall nanodiamonds. We particularly focus on the advantages of bottom-up synthesis of these particles and critically assess the physicochemical properties of ultrasmall nanodiamonds, which significantly differ from those of larger particles and bulk diamond.

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Section: Nondetonation Synthesis and Growth Of Diamondmentioning

confidence: 99%

Section: Nondetonation Synthesis and Growth Of Diamondmentioning

confidence: 99%

Ultrasmall Nanodiamonds: Perspectives and Questions

et al. 2022

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“…These works have not attracted wide attention of the scientific community related to their publication only in Russian. Over the past two decades such methods as various types of chemical vapor deposition CVD (in RF and microwave discharge, DC plasma, as well as the method of hot filament), the synthesis in flames of hydrocarbons and arc discharge have been developed for producing carbon nanotubes [1,[3][4][5]. Despite the fact that these methods achieved a high level of quality, they are still far from complete control of important structural features, such as the length of the nanotubes, their diameter and chirality [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Carbon Nanofibers on Copper Nanopowders by Low-Temperature CVD

Partizan

Mansurov²,

Medyanova

et al. 2017

Eurasian Chem. Tech. J.

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The article presents the results of experiments on the synthesis of carbon nanofibers by thermal chemical vapor deposition using copper nanopowders obtained by electric explosion of wire as catalysts. Stable growth of carbon nanofibers was carried out at temperatures significantly lower than normally used. The process parameters that are optimal for low-temperature growth of carbon nanofibers have been identified during the performed experiments. The synthesized samples have different diameters and morphology (from spiral to direct). Copper clusters are both at the ends and inside the fibers. The results of IR spectroscopy indicate that the structure of the obtained carbon nanofibers is polymeric. X-ray analysis revealed the presence of a halo on the diffraction patterns at small values of the angle 2θ, which proves that the grown structures have an amorphous nature. There are no groups that are responsible for long-range order in all Raman spectra. Studies by transmission electron microscopy showed that nanostructures do not have an internal channel and nanofibers are solid.

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Investigation of Microdiamonds Obtained by the Oxygen-Acetylene Torch Method

Mansurov¹,

Medyanova²,

Kenzhegulov³

et al. 2017

Eurasian Chem. Tech. J.

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The results of experiments on the synthesis of micro- and nano-diamonds by an oxy-acetylene torch on the surface of the pre-deposited copper thin films are presented in this article. The influence of thickness of a buffer copper film and the ratio of the concentrations of oxygen and acetylene on the structure of the deposited samples has been studied in the course of the conducted experiments. The studies by Raman scattering and scanning electron microscopy showed that the synthesis of micro- and nano-diamonds occurs under certain experimental conditions. From the results of the analysis of the obtained samples by the methods of Raman scattering and scanning electron microscopy, it was determined that the deposition time of the copper films and consequently its thickness mainly influence on the structure formation of diamond crystals. On copper films grown for 30 min, the Raman scattering method showed a shift of the diamond peak from the standard (1332 cm‒1) to the low-frequency band (1331.3 cm‒1), which may occur after the presence of stress in the crystals. The results of the investigation showed that with increasing of synthesis time take place smoothing of the facets of crystallites (scanning electron microscopy) and decrease in intensity of the diamond peaks (Raman scattering method).

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Synthesis of micro- and nanodiamonds by the method of oxy- acetylene combustion flame

Cited by 3 publications

References 6 publications

Ultrasmall Nanodiamonds: Perspectives and Questions

Ultrasmall Nanodiamonds: Perspectives and Questions

Synthesis of Carbon Nanofibers on Copper Nanopowders by Low-Temperature CVD

Investigation of Microdiamonds Obtained by the Oxygen-Acetylene Torch Method

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