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Zolotarenko A.D.,Ukrainian Academy of Sciences | Lavrenko V.A.,Ukrainian Academy of Sciences | Zaginaichenko S.Y.,Ukrainian Academy of Sciences | Shvachko N.A.,Ukrainian Academy of Sciences | And 5 more authors.
NATO Science for Peace and Security Series C: Environmental Security | Year: 2011

This paper discusses the method of arc discharge in gaseous phase (ADG) and it has been used for production of iron, nickel and their mechanical mixtures based on Me-C composites. The product has been synthesized using are plasma -chemical installation with vertical location of the reactor which has the mobile cathode. The mechanical mixture of graphite and metals powders has been added into the anode along its axis. Investigations of micro- and nanostructures of produced composites have been carried out using the transmission electron microscope (TEM). The Me-C nanocomposites (Me = Fe, Ni, Fe + Ni) with the structure simillar to the nucleus - cover structure have been produced. It has been noticed their response to the magnetic field action. Me-C nanocomposite material has been taken out of soot by magnetic separation of parietal soot suspension in hydrocarbons. The initial fullerite crystals, which are contained in soot before extraction process, have been shown. The self-descriptiveness and the high speed performance of qualitative and quantitative analysis of the method for soluble nanomaterials have been pointed out. © Springer Science+Business Media B.V. 2011. Source


Zolotarenko A.D.,Ukrainian Academy of Sciences | Rudakova E.,Ukrainian Academy of Sciences | Zaginaichenko S.Y.,Ukrainian Academy of Sciences | Dubovoy A.G.,Ukrainian Academy of Sciences | And 8 more authors.
NATO Science for Peace and Security Series C: Environmental Security | Year: 2011

The processes occurring on the electrodes and in the liquid phase during the arc discharge in the liquid phase (ADLP) have been considered in the present work and we explain the mechanism of carbon nanostructures (CNS) formation proposing the model based on the analysis of existing regularities in behaviour of charged particles under extreme temperature and pressure gradients. The CNS synthesis by ADLP method has been performed in dielectric liquids: hydrocarbons, liquid gases (N2, Ar, He, etc.), deionized water and others. Suspension containing clusters of synthesized nanostructures has been formed by the synthesis. The efficiency of this method is sharply increased by using arc discharge in the liquid phase where powder reagent layer is used as anode. To increase the frequency of electrodes clamping and moving apart, an electromagnetic vibrator has been used in this method and it brings and takes away the cathode from the powder reagent at a specified frequency. For ADLP, nanostructures form simultaneously at several points on the conducting particle surface as a result of microscopic acts of arc discharge. These nanostructures are generated from the liquid phase and anode vapors and represent the product exhibiting rather interesting physical and chemical properties. Based on the analysis of the observations performed in the course of carbon nanostructures synthesis, the model of nanostructures formation by arc discharge in the liquid phase has been proposed in this paper. Presence and absence of deposit on the cathode have been explained. © Springer Science+Business Media B.V. 2011. Source


Sementsov Y.,O Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine | Prikhod'ko G.,O Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine | Kartel M.,O Chuiko Institute Of Surface Chemistry Of Nas Of Ukraine | Tsebrenko M.,Kiev National University of Technologies and Design | And 2 more authors.
NATO Science for Peace and Security Series C: Environmental Security | Year: 2011

It was shown that insertion of carbon nanotubes (CNT) in different matrixes, such as polymers, hydroxyapatite (HAP), elastomers and liquid Selenium, leads to significant changes of their parameters. The influence of filler appears on strength characteristics of obtained composite materials. Such changes were due to CNT net-working in initial matrix. Also it was shown that not only volume characteristics of filled composites but surface properties are changing and this explains the better biocompatibility of nanocomposites, which is observed in vivo experiments. © Springer Science+Business Media B.V. 2011. Source

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