Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In the present study we report resonance Raman study on multiwalled carbon nanotubes treated with HCl, HNO 3 and H 2 SO 4 . Acids are commonly used in purification procedures in order to remove catalyst particles from the as-produced material. However, it is known that acid treatments in multiwalled carbon nanotubes c…
Ab initio calculations based on density-functional theory have been employed to study structural and electronic properties of Bi4Ge3O12 (BGO) and Bi4Si3O12 (BSO), as well as their optical characteristics in ultraviolet region, up to 40 eV. The electronic structure around the band gap is found to be similar in both com…
Carbon dioxide is one of the main gaseous products in oxidation of carbonaceous materials via both homogeneous and heterogeneous reactions. However, the mechanisms of heterogeneous CO(2) evolution during oxidation of aromatic carbon-based materials are not known in detail. Using density functional theory, a new oxidat…
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
The mechanism of self-assembly of symmetrically and topologically different chains and microlayers (in the form of planar nets) from cyclic three-node clusters A 3 is considered in the model system. The obtained nets correspond to the uninodal Shubnikov nets N 3 12 12 and N 3 6 3 6 and the new binodal net N1 3 6 3 6 +…
Having three-phase conductors arranged in inverted-delta mode in the same tower window,750 kV compact double circuit transmission line, which is built in China for the first time, has the seriously distorted voltage and electric field distribution of insulator strings, because of great mutual influence among three pha…
Materials used in the manufacture of polymeric insulators were ethylene propylene diene monomer (EPDM) and silicone rubber (SR). Non ceramic insulators have shown good performance even in hostile environments. Silicone rubbers helped considerably to eliminate the contamination problem. Silicone rubbers have low surfac…
Kurzfassung Die Betriebsfestigkeit von Bauteilen wird grundsätzlich durch die Interaktion von Belastung, Werkstoff, Formgebung und Fertigung bestimmt. In jedem dieser einzelnen Parameter ist ein großes Optimierungspotenzial für den Leichtbau vorhanden, das nicht ausgeschöpft ist. Anhand eines Panhardstabes, eines stab…
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
The formation of diffusers and microlens rasters on silver halide emulsions by holographic methods is considered. Two techniques for converting amplitude holographic recording to relief-phase recording, selective curing and irradiation of the emulsion gelatin by short-wavelength UV radiation, are compared.
Energy structure of the Peierls gap in orthorhombic TaS 3 is examined by spectral study of photoconduction. The gap edge and energy levels inside the Peierls gap are observed. The amplitude of the energy levels is found to depend on both the temperature and the electric field. The electric field of the order of 1–10 V…
The anomalous properties of electromagnetic radiation from an antenna in the form of a rectangular section waveguide tube made of a metamaterial with the negative real parts of permittivity and permeability have been demonstrated. The metamaterial is an isotropic two-dimensional array of left and right-twisted coils p…
Motivated by iodo platinum complexes assembled within a quadratic-prism lattice, [Pt(C2H8N2)(C10H8N2)I]4(NO3)8, we investigate the ground-state properties of a Peierls-Hubbard four-legged tube. Making a group-theoretical analysis, we systematically reveal a variety of valence arrangements, including half-metallic char…
We have studied the response speed characteristics of capacitor structures based on thin Ba 0.3 Sr 0.7 TiO 3 (BSTO) films with metal-ferroelectric contacts of various types formed under different conditions. It is established that threshold voltages exist for the appearance of a residual space charge in some structure…
The mechanism of columinescence (fluorescence sensitization) of dyes incorporated in nanostructures of metal complexes is studied. It is shown for the first time that the columinescence of dyes is due to the transfer of excitation energy from ligands and metal ions of complexes that form nanostructures. It is proven t…
Discovery of new microcrystalline forms of carbon with a number of unique properties has required development of new approaches to the theoretical description of their electronic structure. The basic structure for the entire family of carbon nanostructures is a graphite sheet (graphene) whose electronic properties at…
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Abstract Pre-irradiated original reactor pressure vessel (RPV) materials covering all four German pressurized water reactors (PWR) construction lines were tested in the Crack Initiation and Arrest of Irradiated Steel Materials program to create a database of fracture toughness and arrest values for neutron fluences be…