A5026380628- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Nuclear Physics and Applications
- Diamond and Carbon-based Materials Research
- Fuel Cells and Related Materials
- Graphene research and applications
- Polymer Nanocomposite Synthesis and Irradiation
- Characterization and Applications of Magnetic Nanoparticles
- Atomic and Subatomic Physics Research
- High-pressure geophysics and materials
- Porphyrin and Phthalocyanine Chemistry
- Advanced Physical and Chemical Molecular Interactions
- Nuclear Materials and Properties
- Material Dynamics and Properties
- NMR spectroscopy and applications
- Advancements in Solid Oxide Fuel Cells
- Polymer Nanocomposites and Properties
- Advanced battery technologies research
- Inorganic and Organometallic Chemistry
- Ion-surface interactions and analysis
- Membrane Separation and Gas Transport
- Physics of Superconductivity and Magnetism
- Nuclear reactor physics and engineering
- Glass properties and applications
- Material Properties and Applications
Petersburg Nuclear Physics Institute
2015-2024
Kurchatov Institute
2013-2024
Ioffe Institute
2022
Russian Academy of Sciences
2002-2018
N2 Biomedical (United States)
2010
St Petersburg University
2009
Institute for Solid State Physics and Optics
2008
Institute of Applied Physics
1979
Carbon nanoparticles with antimicrobial properties, such as fullerenes, can be distinguished among the promising means of combating pathogens characterized by resistance to commercial antibiotics. However, they have a number limitations for their use in medicine. In particular, insolubility carbon water leads low biocompatibility and especially strong aggregation when transferred liquid media. To overcome negative factors enhance action fullerenes an extended range applications, example,...
The structure of a hydrogel consisting diamond nanoparticles formed by the explosion method has been studied. Small angle neutron scattering used as for characterization gel. Joint approaches data analysis in reciprocal and direct space have developed to restore multilevel structure. pristine positively charged particles (~5 nm size, concentration ~5 wt %), even four-fold dilution below its formation critical point, (C* ~ 4 %) retains practically original where single are joined into small...
The paper overviews the way of creating intumescent fire-protective compositions with improved properties by adding nano-and micro-sized supplements into them. Intumescent paints are inert at low temperatures, and higher temperatures they expand degrade to provide a charred layer conductivity materials. modified able form more stable than classical paints. stability is crucial if fire safety in high-rise construction must be secured, because weak will not required endurance for steel bearing...
Compositional proton-conducting membranes based on perfluorinated Aquivion®-type copolymers modified by detonation nanodiamonds (DND) with positively charged surfaces were prepared to improve the performance of hydrogen fuel cells. Small-angle neutron scattering (SANS) experiments demonstrated fine structure in such filled DND (0-5 wt.%), where conducting channels typical for Aquivion® are mostly preserved while particles (4-5 nm size) decorated polymer domains a submicron scale, according...
Perfluorinated short side chain membranes synthesized by novel aqueous emulsion method demonstrate specific structure dependent on the chemical composition.
Powder diamonds with integrated europium atoms were synthesized at high pressure (7.7 GPa) and temperature (1800 °C) from a mixture of pentaerythritol pyrolyzate diphthalocyanine (C64H32N16Eu) being special precursor. In prepared by X-ray fluorescence spectroscopy, we have found concentration Eu 51 ± 5 ppm that is two orders magnitude greater than in natural synthetic diamonds. diffraction, SEM, exited optical luminescence, Raman IR spectroscopy confirmed the formation high-quality diamond...
Abstract A method for the synthesis of a new silicone hydrogel as biphase material soft contact lenses is considered. The based on sequential interpenetrating polymer networks (IPN) and includes following stages: (1) cross‐linked by reaction vinyl‐ hydride‐containing oligosiloxanes; (2) network saturation with vinyl acetate cross‐linking monomer followed UV‐initiated polymerization to form an IPN comprising poly(vinyl acetate) (PVAc) network; (3) PVAc alcoholysis methanol obtain hydrogels...
Hybrid membranes based of polyphenylene oxide matrix and star macromolecules (up to 5 wt%) containing six polystyrene poly-2-vinylpyridine arms attached a common fullerene C60 center were prepared successfully used for pervaporation separation acetic acid – water mixtures. The peculiarities the hybrid membrane structure properties studied by small-angle neutron scattering in two states (dry swollen deuterated acid). It was established that are non-uniformly distributed form aggregates; they...
Stretching of membranes with low molecular weight makes structure rearrangement according to neutron scattering data on D<sub>2</sub>O-filled membranes.
A new approach was applied to improve the proton conductivity mechanism in perfluorinated membranes for hydrogen fuel cells. The composite short-side chain were modified with functionalized diamond nanoparticles. Carboxylated nanodiamonds embedded polymer matrix provide an increase at a moderate nanodiamond content, while mechanical strength of remains high. casting method preparation from solutions N,N-dimethylformamide allowed saving general channel structure presence nanodiamonds,...
Fullerenols' C60(OH)X self-assembly in aqueous solutions (25°C, pH = 5–8) has been studied by small-angle neutron scattering. The solution of (X ∼ 20, content CF 0.5 mg/ml, 5) shown the increase short-range order addition Na-citrates, while Na-phosphates have induced formation two-level structures with tiny particles (size 6 nm) packed into large clusters (gyration radius 30 nm, fullerenols' volume fraction 50%). observed peculiarities fullerenes association are important for development...
Three polymerizable surfactants (surfmers) bearing 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as group in the counterion have been designed, synthesized, and their micelle-forming properties investigated different solvents. Solutions of dodecylammonium (DDA-AMPS), cetylammonium (CA-AMPS), cetyltrimethylammonium (CTA-AMPS) 2-acrylamido-2-methylpropanesulfonates were studied water, water–dioxane mixtures a whole range components ratios, xylene. The solutions by capillary rotational...
Aquivion®-type perfluorosulfonic acid membranes with a polytetrafluoroethylene backbone and short side chains sulfonic groups at the ends have great prospects for operating in hydrogen fuel cells. To improve conducting properties of membranes, various types nanofillers can be used. We prepared compositional embedded detonation nanodiamond particles. Nanodiamonds were chemically modified to increase entire amount ionogenic involved proton conductivity mechanism membranes. demonstrated rise...