Materials Literature
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Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device design is increasing the volume fraction of magnetic nanoparticles by enhancing the permeability of composites. In this study, composites were prepared using Ni-Zn f…
A multifunctional ZnO tip-coated carbon nanotubes (CNT) core–shell structure was synthesized for the application of a CNT-based device with photoluminescence and field emission properties. The synthesis first includes the growth of vertically aligned carbon nanotubes core by plasma-enhanced chemical vapor deposition a…
Comparative analysis of recent literature data on hydrophilization of semiconductor quantum dots, which are actively used at present in various fields, has been performed. The main methods of preparation of hydrophilic quantum dots are considered: synthesis of the particles in aqueous solutions; replacement of hydroph…
The exploration of the NiX(2)/py(2)CO/Et(3)N (X = F, Cl, Br, I; py(2)CO = di-2-pyridyl ketone; Et(3)N = triethylamine) reaction system led to the tetranuclear [Ni(4)Cl(2){py(2)C(OH)O}(2){py(2)C(OMe)O}(2)(MeOH)(2)]Cl(2)·2Et(2)O (1·2Et(2)O) and [Ni(4)Br(2){py(2)C(OH)O}(2){py(2)C(OMe)O}(2)(MeOH)(2)]Br(2)·2Et(2)O (2·2Et(2…
Electrical conductivity was obtained in hybrid organic nanofibers fabricated with low-molecular-weight amphiphilic azopyridinium and dodecylbenzenesulfonic acid or its salt.
The effect of chromium and vanadium alloying on the hydrogenation of a magnesium thin film is studied by neutron reflectometry. Immediate formation of a blocking MgD(2) layer is observed in pure Mg, however in the alloyed film deuteration is rapid and almost completely homogeneous.
The structural, optical, and electronic properties of four rare-earth bismuth tungstate compounds, LnBiW(2)O(9) (Ln = Ce, Sm, Eu, Er), have been investigated by means of single-crystal X-ray diffraction, elemental analyses, and spectral measurements. For some of the compounds, the calculations of energy band structure…
A new zeotype titanium silicate oxidation catalyst with the STT topology has been synthesized from direct synthesis. Ti-STT has a microporous structure with small pore openings, allowing shape selective oxidation catalysis. The isomorphous substitution of Si by Ti in the framework has been confirmed by Raman, FT-IR, U…
The influence of the initiator ligand on the Ring Opening Polymerization (ROP) of ε-caprolactone by lanthanide complexes grafted on silica have been investigated by means of density functional theory (DFT) calculations. Three different initiator ligands (alkyl, dialkylamido and borohydride) and three grating modes (mo…
Single-crystalline CeO 2 octahedra were successfully grown on Cu substrates via a facile electrochemical approach, and free-standing CeO 2 nanotubes with high crystallinity were also obtained by adjusting the reaction temperature. A ferromagnetic behavior at 5 K arising from their intrinsic defects is observed for the…
The amphiphilic block copolymer methoxy-poly(ethylene glycol)-poly(epsilon-caprolactone) (mPEG-PCL) was grafted to 2-hydroxyethyl cellulose (HEC) to produce nano-sized micellar nanoparticles. The nanoparticles were loaded with anti-tumor drug, doxorubicin (DOX) and the size of the DOX-loaded nanoparticles were determi…
The CdS nanocrystals with different aspect ratios (ARs) can be synthesized directly in the presence of conjugated polymer poly(3-hexylthiophene-2,5-diyl) (P3HT). The UV-vis spectra of the composite films show a blue shift of the π-π * transition band with an increasing aspect ratio (AR) of the CdS nanocrystals, which…
The physical factors governing the magnetic coupling between two magnetic sites are analyzed and quantified as functions of the length of the bridging conjugated ligand. Using wave-function-theory based ab initio calculations, it has been possible to separate and calculate the various contributions to the magnetic cou…
After preparing a biphenyl derivative possessing two 2,3-difluoro-1,4-diphenylbenzene units, we investigated its phase transition behaviour. It showed a phase sequence of isotropic liquid–nematic phase–anticlinic smectic C phase. A mixture with a chiral additive with a high twisting power exhibited a cubic blue phase…
The effects of restricted slip conditions on both the Taylor factor and plastic work rate under the condition of tensile yielding have been analyzed in α-titanium alloys at low temperatures, using the full constraints model. The role of secondary slip systems, i.e., the 〈a〉 basal slip and 〈c+a〉 pyramidal slip, was cla…
When emission gasses are compressed into deep geological layers (CCS) CO2-corrosion of injection pipe steels is a relevant safety issue. The reliability of the steels used at the geological onshore CCS-site at Ketzin, Germany, is demonstrated in 2 years laboratory experiments under an equivalent corrosive environment…
Solid-state electropolymerization could be a way to produce organic semiconductors with potential application as Hole Transporting Materials (HTMs) in hybrid organic-inorganic devices. Thereby, thin solid films of triphenylamine (TPA) deposited by spin coating on conducting glass substrates have been electrochemically…
Efficiency of acid extract of dry azadirachta indica seed as corrosion inhibitor for mild copper metal in various concentration of (1 N,2 N and 3N) HNO 3 medium was investigated in the present study. Experimental methods include weight loss, determination of corrosion rate, inhibition efficiency and phytochemical anal…
The increasing cost of the lithographic process, which is driven both by process complexity and by the increasing price of moving to smaller exposure wavelengths, makes approaches that use ′smart chemicals′ and ′bottom up′ patterning processes that employ molecular scale assembly processes ever more attractive. The te…
The electronic structure of LaCoO 3 at finite temperatures is calculated using the LDA+GTB method taking into account strong electron correlations and possible spin crossover upon an increase in temperature. Gap states revealed in the energy spectrum of LaCoO 3 reduce the dielectric gap width upon heating; this allowe…