Materials Literature
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The encapsulation of aqueous and organic solvents with particles used to form liquid marbles implies there are attractive interactions between the particles and those different liquids. This is often masked, however, by the impact of the droplet kinetic energy on marble formation. We investigated droplet wetting and e…
Halloysite clay nanotubes were used as a support for the immobilization of the enzyme peroxidase from clover sprouts (Trifolium), and employed together with platinum nanoparticles in 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid (Pt-BMI·PF(6)) in the development of a new biosensor for the determination…
The potential of organic–inorganic liposomal cerasomes to store and release doxorubicin (DOX) is investigated. Specifically, cerasomes display sustained DOX release in serum-enriched cell culture medium but minimal drug leakage in deionized water. As revealed by a physics-based model, the medium-sensitive DOX release/…
Glass samples with the composition 2SrO·TiO2·2.75 SiO2 were polished, subsequently covered with graphite or alumina powder and finally annealed at 970 °C for 20 h in order to induce surface crystallisation. The effect of the surface treatment on the preferred crystal orientations during growth into the bulk is analyze…
Crystal specimens of the γ-polymorph of achiral glycine which crystallize in space groups P31 and P32 as determined by the anomalous X-ray scattering method are shown to be laevorotatory and dextrorotatory, respectively, as determined by optical rotation of the crystals.
A newly structured nanocomposite material based on nanocrystalline ZnO/Yb2O3 has been prepared by thermal decomposition of Yb-doped zinc carbonate hydroxide. Transmission electron microscopy has revealed that the prepared nanopowder consists of ZnO nanocrystals of about 50 to 100 nm size decorated by attached smaller…
A new organic-inorganic hybrid, [Cu(en)(2)](3){[Cu(en)(2)][H(6)SiNb(18)O(54)]}·22H(2)O (1, en = ethylenediamine) containing the crescent-shaped polyoxoanion [H(6)SiNb(18)O(54)](8-) and copper-organic cations has been successfully synthesized, and elemental analyses, IR spectra, thermogravimetric analyses and single-cr…
The effects of niobium substitution on the crystal structure and on the ferroelectric and piezoelectric properties of Bi1/2(Na0.82K0.18)1/2(Ti)O3 (BNKT) ceramics have been investigated. X-ray diffraction analyses revealed that Nb-substitution induced a phase transition from the coexistence of rhombohedral-tetragonal s…
This paper describes the first application of ultrafast scanning calorimetry to the process of gelation in concentrated (40 wt%) aqueous gelatin solutions. It demonstrates that the regular gelation that occurs on cooling can be outrun at sufficiently fast cooling rates (≥500 K s−1) so that the solution reaches a metas…
The influence of Na2WO4 on the forming process and corrosion resistance of ceramic coatings was researched in silicate electrolyte system. The surface morphology and phase composition of ceramic coatings were analyzed by SEM and XRD. The results show that Na2WO4 can promote the formation of high impedance coatings, re…
Nanostructured lead-free ferroelectric Na(0.5)Bi(0.5)TiO(3)-BaTiO(3) (NBTBT) whiskers with a high aspect ratio were synthesized topochemically using Na(2)Ti(6)O(13) (NTO) as a host structure for the first time. High energy X-ray diffraction coupled with an atomic pair distribution function (PDF) and Raman scattering a…
The dynamics of symmetry breaking responsible for lifting the degeneracy of the Landau levels (LLs) in the integer quantum Hall (QH) effect in graphene is studied in a low-energy model with the Coulomb interaction. The gap equation for Dirac quasiparticles is analyzed for both the lowest and higher LLs, taking into ac…
Films of silicon carbonitride of variable composition are prepared by the method of plasmochemical decomposition of tetramethyldisilazane, hexamethyldisilazane, and hexamethylcyclotrisilazane in the mixture with helium in the temperature range of 373–973 K. The chemical composition of the low temperature films (373–67…
The thermoresponsive polymer poly-N-isopropylacrylamide (PNIPAAM) was grafted in mesoporous SBA-15 silica. The grafting process consists of three steps: (i) increasing the amount of surface silanol groups of SBA-15 by hydroxylation, (ii) attachment of an anchor (1-(trichlorosilyl)-2-(m/p-(chloromethylphenyl)ethane) an…
The magnetic Fe3O4 nanoparticles with average diameter of about 10nm were prepared by the hydrothermal method. The Fe3O4/polyaniline nanocomposites were synthesized via reversed micelle method by using Fe3O4, camphorsulfonic acid (CSA) and ammonium peroxydisulfate (APS) as raw material, dopant and surfactant, and oxid…
We study the self-assembly of symmetric star-like block copolymers (A(x))(y)(B(x))(y)C in dilute solution by using Brownian dynamics simulations. In the star-like block copolymer, incompatible A and B components are both solvophobic, and connected to the center bead C of the polymer. Therefore, this star-like block co…
A new method to spatially probe heterogeneous catalysed reactions within a packed bed of catalyst has been developed. The spatial resolution is achieved using a stationary perforated capillary coupled to a mass spectrometer while the catalyst bed is moved. The oxidation of CO promoted by H2 over a Pd catalyst has been…
A dual-templated approach for the controllable synthesis of metal cluster complexes is described. By using an acetylide-containing anion with specific geometry as a central template and a macrocyclic coordinative compound as a peripheral one, two multinuclear silver-acetylide cluster-encapsulated supramolecular boxes…
Fe-0.25C-1.48Mn-1.20Si-1.51Ni-0.05Nb ( , %) Q-P-T AE .
Alumina doped nickel ferrite nano-particles have been synthesized by the combustion route. Characterization of the products carried out using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Magnetic and surface properties of the as prepared ferrites were determining by using vibrating sample magnetomet…