Materials Literature
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Two aerosol synthesis methods of carbon nanotubes are considered. The possibility of separation of individual single-walled nanotubes from the bundle in the gas phase and control of their parameters with the help of etching agents is shown. The advantage of the aerosol synthesis methods of nanotubes both for variation…
Chemical functionalized graphene (f-G) was obtained by the reaction of the residual epoxide and carboxyl functional groups on the hydrazine-reduced graphene (G) sheets with hydroquinone. The efficacy of the functionalization reaction of graphene was confirmed by X-ray photoelectron spectroscopy and thermogravimetric a…
m and with established mineral content in the individual fibers. The X-ray diffraction showed the crystalline feature of the obtained nano-compounds. The thermo gravimetric analysis was used to differentiate between the collagen and mineral parts of obtained product. Overall, the results generously indicated productio…
Aqueous dispersion of Shungite carbon (ShC) condensation is followed by aggregation of carbon nanoparticles and further net formation. Data obtained by adsorption methods that characterized changes in porosity of natural shungites when transformed into aqueous dispersion and precipitated, were investigated. Pore size…
We present a short review of experimental research carried out at the NRC Kurchatov Institute over recent years on the behavior of plasma-facing materials (PFMs) when a high level of radiation damage in plasma. Neutron-induced damage was modeled with accelerated ions (in the MeV range) and covered a 1–80 dpa interval.…
We report ab initio pseudopotential DFT calculations on the energetic stability and magnetic ordering of Cr in diamond at various lattice sites and charge states and show that Cr is most stable at the divacancy site in diamond, with the lowest formation energy occurring in $n$- or $p$-type diamond, compared to intrins…
In order to understand the role of a plasma-sprayed tungsten (W) coating on tritium (T) permeation in a W-coated ferritic/martensitic steel (F82H), we have examined depth profiles of T in the coating and the substrate using the tritium imaging plate technique after T loading by a dc glow-discharged plasma at 453 and 5…
The change in the local density of states δρ g of a single-sheet graphene due to adsorption of a single atom has been calculated in the framework of the M model proposed earlier. The dependence of the local density of states δρ g on the position of the adatom energy level ɛ a with respect to the Dirac point and other…
The soundness of a power transformer under an operating voltage is evaluated in partial discharge (PD) test of long-duration ac withstand voltage test. To establish clear control criteria for this PD test, it is necessary to study PD propagation characteristics inside the transformer windings. In this paper, a study w…
We developed a dissipative quantum transport simulator for graphene transistors, which has the capabilities to model Klein band to band tunneling and dissipative phonon scattering process simultaneously. Simulation of DC I-V characteristics indicates that device physics of carrier scattering in short channel graphene…
It has been revealed that the dependence of the Fermi velocity on the number of charge carriers in doped graphene contains a sharp peak at which the Fermi velocity can increase by a factor of more than 1.5. It has been shown that this peak, which appears when the Fermi energy coincides with the energy of single-impuri…
Thermo-Calc modelling was employed to predict liquid phase amounts for Fe–0·85Mo–(0·4–0·6)Si–(1·2–1·4)C in the temperature range of 1285–1300°C and such powder mixes were pressed and liquid phase sintered. In high C steels, carbide networks form at the prior particle boundaries, leading to brittleness, unless the stee…
A series of poly(imide siloxane) block copolymers were prepared based on diphenylthioether dianhydride isomer mixtures (m-TDPA), 4,4′-oxydianiline (ODA) and bis(γ-aminopropyl)polydimethylsiloxane (APPS). The ODA and m-TDPA composed the hard segment, while the APPS and m-TDPA composed the soft segment. The hard segment…
Abstract The mechanical behavior of acrylonitrile butadiene copolymer (NBR)–organomodified layered silicate (nanoclay) was modeled using design of experiments approach. A Box–Behnken design with three factors and three levels was used to model the relationship between properties of NBR nanocomposites and the ingredien…
We present the first analysis of device yield and material composition for several low work-function metal contacts to carbon nanotubes (CNT), including the first demonstration of high-performance n-channel field-effect transistors (NFET) from erbium (Er) and lanthanum (La). Our results indicate drastic improvement in…
BACKGROUND: Nanoparticles represent promising drug carrier systems. In the case of cytostatics such as doxorubicin, carrier colloid systems as human serum albumin (HSA) nanoparticles, may increase their therapeutic efficiency and decrease their side-effects (toxicity) and any potential multidrug resistance. In the pre…
Non-destructive examination followed by high-heat-flux testing was performed for different small- and medium-scale mock-ups; this included the most recent developments related to actively cooled tungsten (W) or carbon fibre composite (CFC) armoured plasma-facing components. In particular, the heat-removal capability o…
Synthetic regrowth of ZnO nanowires [NWs] under a similar chemical vapor transport and condensation [CVTC] process can produce abundant ZnO nanostructures which are not possible by a single CVTC step. In this work, we report three different regrowth modes of ZnO NWs: axial growth, radial growth, and both directions. T…
The structure of ice samples formed in the decay of a water impurity gel at temperatures above 4 K and atmospheric pressure has been examined. The X-ray diffraction analysis indicates that three phases coexist in the initial sample at temperatures of 85–110 K. These phases are amorphous ice occupying up to 30% of the…
Magnetic properties of spatially ordered arrays of interacting nanofilaments have been studied by means of small-angle diffraction of polarized neutrons. Several diffraction maxima or rings that correspond to the scattering of the highly ordered structure of pores/filaments with hexagonal packing have been observed in…