A5067361826- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Molecular Junctions and Nanostructures
- Advanced Physical and Chemical Molecular Interactions
- Magnetism in coordination complexes
- Graphite, nuclear technology, radiation studies
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Fiber-reinforced polymer composites
- Advanced Chemical Physics Studies
- Semiconductor materials and interfaces
- Ion-surface interactions and analysis
- Polymer Nanocomposite Synthesis and Irradiation
- Advancements in Battery Materials
- Porphyrin and Phthalocyanine Chemistry
- Advanced NMR Techniques and Applications
- Synthesis and Properties of Aromatic Compounds
- Quantum Dots Synthesis And Properties
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Silicon Nanostructures and Photoluminescence
Geographical Institute
2023
Far Eastern Branch of the Russian Academy of Sciences
2023
Ufa State Aviation Technical University
2020
Physico-Technical Institute
2006-2018
Lappeenranta-Lahti University of Technology
2015-2018
Novosibirsk State University
2018
Ioffe Institute
2005-2017
Russian Academy of Sciences
1999-2015
Saint Petersburg State Electrotechnical University
2015
Umeå University
2005-2014
Abstract Development of graphene spintronic devices relies on transforming it into a material with spin order. Attempts to make magnetic by introducing zigzag edge states have failed due energetically unstable structure torn edges. Here, we report the formation nanoridges, i.e., stable crystallographically oriented fluorine monoatomic chains and provide experimental evidence for strongly coupled at graphene-fluorographene interfaces. From first principle calculations, spins localized are...
We have studied the changes in magnetic behavior of highly oriented pyrolytic graphite (HOPG) samples subjected to medium-energy proton and helium irradiation. The variations ferromagneticlike magnetization curves with irradiation dose been for two configurations: fields parallel perpendicular graphitic planes. For high doses, values at saturation are close both geometries. At low fluences an orientationally dependent response is obtained. Directional dependence indicates that magnetism...
We present band structure calculations of rhombohedral ${\mathrm{C}}_{60}$ performed in the local-spin-density approximation. Rhombohedral ${\mathrm{C}}_{60}({\mathrm{R}\mathrm{h}\ensuremath{-}\mathrm{C}}_{60})$ is a two-dimensional polymer with trigonal topology. No magnetic solution exists for ${\mathrm{R}\mathrm{h}\ensuremath{-}\mathrm{C}}_{60}$ and energy bands different spins are found to be identical not split. The calculated C $2p$ partial density states compared carbon $K$-edge x-ray...
Tabby is a pattern of short irregular stripes, usually related to domestic cats. We have produced patterns on graphene by attaching fluorine atoms running as monoatomic chains in crystallographic directions. Separated non-fluorinated sp
The valence electronic structure of rhombohedrally polymerized C60, synthesized at 6 GPa and 725 °C, has been studied using x-ray emission spectroscopy. C Kα spectrum the polymer was found to differ from that C60 fullerite especially in high-energy region. observed spectra were compared densities states, calculated a tight-binding approximation for three two-dimensional hexagonal networks, distinguished by nature intermolecular bonding. Theoretical polymers agree well with experiment...
A mechanism of the high-temperature ferromagnetism in polymerized fullerenes is suggested. It assumed that some ${\mathrm{C}}_{60}$ molecules crystal become magnetically active due to spin and charge transfer from paramagnetic impurities (atoms or groups), such as hydrogen, fluorine, hydroxyl group OH, amino $\mathrm{N}{\mathrm{H}}_{2}$, methyl $\mathrm{C}{\mathrm{H}}_{3}$, dispersed fullerene matrix. The exchange interaction between spins localized on evaluated using ab initio calculations....
Abstract The structural relaxation of nanographite ball‐milled in argon atmosphere and stored evacuated ampoules, has been studied by monitoring the evolution Raman spectra. Reduction some bands associated with “in‐plane” defects, such as vacancies, dislocations or grain boundaries, those “out‐of‐plane” stacking faults, is accompanied rise new around 1180 2000 cm –1 . development these suppressed samples exposed to a flux pure anhydrous hydrogen. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA,...
Abstract For see ChemInform in Full Text.
The possibility of formation radical centers in a hexagonal ${\mathrm{C}}_{60}$ polymeric layer, without damage to the fullerene cages, is shown. geometry optimization trimers and tetramers using semiempirical AM1 method has revealed that linking molecules through single bond preferred for multiplet states system. density unpaired electrons mainly localized vicinity bonds producing narrow energy bands near Fermi level polymers. magnetic state polymer depends on number location layer.
Room temperature ferromagnetic-like behavior in fullerene photopolymerized films treated with monatomic hydrogen is reported. The treatment controllably varies the paramagnetic spin concentration and laser induced polymerization transforms phase to a one. Excess irradiation destroys magnetic ordering, presumably due structural changes, which was continuously monitored by Raman spectroscopy. We suggest an interpretation of data based on first-principles density-functional spin-unrestricted...