Materials Literature
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The paper reports on a study of the luminescence of lithium borate crystals (Li 6 Gd(BO 3 ) 3 doped by Eu 3+ and Ce 3+ ions, Li 5.7 Mg 0.15 Gd(BO 3 ) 3 : Eu, and Li 6 Eu(BO 3 ) 3 ) initiated by selective excitation by synchrotron radiation at excitation energies of 3.7–27 eV at 10 and 290 K. Efficient energy transfer…
Medium-sized pores of which diameter was over 100 nm were successfully prepared by anodization in 3 wt% HF aqueous solution containing KMnO4 and surfactant. The presence of an appropriate oxidizing agent and a surfactant was indispensable for the formation of medium-sized pores, but the concentration dependence was no…
CdS and ZnS thin films composed of nanocrystalline granules have been obtained as deposits at the water/toluene interface in a beaker. Metal diethyldithiocarbamates dissolved in toluene provide metal ions while Na2S dissolved in water provides the sulfide ions for the formation of metal sulfides. The influences of dep…
We introduce quasi-periodic Fibonaccian phase defects into single-pitched cholesteric liquid crystalline systems. Numerical simulations of reflection spectra from the proposed systems demonstrate simultaneous red, green, and blue reflections or multiple photonic band gaps. Fundamental optical properties are discussed…
A (LSCM/GDC) composite electrode was developed and applied as a solid oxide fuel cell (SOFC) anode for the direct oxidation of sulfur-containing methane. The anode was fully activated in wet at and a constant potential of with respect to a Pt/air reference before the fuel was shifted to wet . In the sulfur-containing…
Access to the new complex [TpCr(CN)3]- enables isolation of two metastable linkage isomers of a face-centered cubic cluster, [Tp8(H2O)6Cu6Cr8(CN)24]4+, both exhibiting an S=15 ground state.
The redox-active films, C 60 ∕ Pd , formed by electrochemical reduction of solutions containing palladium(II) acetate and C 60 fullerene have been studied as active components for electrochemical capacitors. The capacitance properties of these materials have been investigated by cyclic voltammetry and electrochemical…
The replacement of an acetate function of the macrocyclic DOTA4-(DO3A-Nprop4-) or the acyclic DTPA5- in terminal position (DTTA-Nprop5-) has been recently shown to result in a significant increase of the water exchange rate on the Gd3+ complexes, which makes these chelates potential contrast agents for MRI application…
The synthesis of ZnSe nanowires is a rapidly expanding research field with numerous applications. Key to realizing the potential of such nanowires is an ability to prepare structurally uniform defect-free material. Microstructure studies on as-grown nanostructures reveal that the structure of these nanowires are highl…
A far-field optical superlens, which is able to form sub-diffraction- limited images in the far field at UV wavelength, was recently demonstrated. In current work we present two methods to tune the working wavelength from UV to visible by tuning either the permittivity of the surrounding medium or that of the metal. A…
Superplasticity was studied in a fine-grained magnesium alloy AZ31 processed by multidirectional forging (MDF) under decreasing temperature conditions. Tensile tests were carried out at temperatures from 393 K to 473 K and at various strain rates. Superplasticity appears even at a low temperature of 393 K with a stres…
UNLABELLED: During the past decades, scientific developments in cutting instruments have changed the conventional techniques used to remove caries lesions. Ultrasound emerged as an alternative for caries removal since the 1950s. However, the conventional technology for diamond powder aggregation with nickel metallic b…
Polypyrrole hydro-sponges with macroscopic features similar to polymer gels were synthesized by assembling polypyrrole microtubules into mesoscale networks. An employed static condition was demonstrated to play an important role in the formation of the new materials. The granules of polypyrrole introduced via the indu…
We report on hybrids of water-soluble calix[8]arenes and single-walled carbon nanotubes (SWCNTs); the hybrids formed supramolecular SWCNTs network polymer by adding guest dimer.
We report on the layer-by-layer (LBL) supramolecular assembly of redox responsive, organometallic polyion films on planar and curved (spherical) substrates. Organometallic poly(ferrocenylsilane) (PFS) polyanions and polycations were first used to assemble multilayers on planar quartz, silicon and quartz-crystal microb…
Meso-substituted corroles bearing directly linked ferrocene unit have been synthesized for the first time. Among various methods studied, only the condensation of pentafluorophenyldipyrromethane with a formylferrocene led to this type of product. A triad containing corrole and porphyrin bridged with ferrocene has been…
Ferroelectric properties of Cr-substituted BiFeO3 (BFCr) and Pb-cosubstituted BFCr films prepared by a chemical solution deposition method and annealed at 550°C in nitrogen have been studied. X-ray diffraction measurements revealed that the thin films were composed of a rhombohedrally distorted perovskite structure wi…
A major constraint in the use of biodegradable polymer scaffolds for vascular tissue engineering is poor cell adhesion and lack of signals for new tissue generation. The presence of extracellular matrix (ECM) within the scaffold is desirable for growth of endothelial cells and in vitro formation of remodelled vascular…
Polymer core-shell nanoparticles are attractive drug-delivery systems because the drug can be encapsulated inside the core, while the shell properties can be assigned to optimise drug-delivery needs. An elegant approach to such particles is to use polymer gels, which have swelling properties that depend upon condition…
Polymer composites filled with natural organic fillers have gained a significant interest during the last few years, because of several advantages they can offer compared with properties of inorganic-mineral fillers. However, these composites (based, in most cases, on polyolefins) often show a reduction in some mechan…