Materials Literature
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Abstract The photo‐curing behavior of composites containing nanosized SiO 2 in an acrylated hyperbranched polymer matrix was investigated by means of photo differential scanning calorimetry. The chemical conversion data were analyzed using an autocatalytic model, paying close attention to the influence of composition…
Abstract This research concerned with the miscibility and thermal properties of syndiotactic polystyrene (SPS) blended with several polymers such as poly ( α ‐methyl styrene)—PaMS, poly(ethyl methacrylate)—PEMA, poly( n ‐butyl methacrylate)—PBMA, poly(cyclohexyl acrylate)—PCHA, and poly( cis ‐isoprene)—PIP. The SPS sy…
Motif-programmed artificial proteins with mineralization-related activity were covalently immobilized onto the surface of a hydrogel, poly(2-hydroxyethyl methacrylate) (PHEMA). We investigated the influence of assaying conditions upon the ability of three selected proteins (PS64, PS382 and PS458) to modulate calcifica…
We study magnetism and hyperfine structure in ${\text{Si}}_{16}{\text{H}}_{16}$ fullerenes endohedrally doped with a transition-metal atom $M=\text{Cr}$, Mn, and Fe using density functional theory calculations. In all cases the endohedral fullerene maintains the same magnetic moment as in a free $M$ atom and it is mai…
Chemical and magnetic homogeneities of Mn and Fe, codoped in Ge, have been studied experimentally and theoretically. As we alter the codopant concentration in our diluted magnetic semiconductors, polarized neutron reflectivity measurements indicate no segregation and lower clustering tendencies for higher Fe doping. F…
Cerium oxide (CeO2) thin films were prepared on (100) Si and glass substrates using pulsed laser ablation at different oxygen partial pressures (2.5 x 10(-5)-3.5 x 10(-1) mbar) and at a substrate temperature of 873 K. XRD studies on the films showed that the films are polycrystalline having fluorite structure. The oxy…
Extended x-ray-absorption fine structure (EXAFS) and x-ray absorption near-edge structure (XANES) were used to examine cubic ${\text{ZrW}}_{2}{\text{O}}_{8}$ and cubic ${\text{ZrMo}}_{2}{\text{O}}_{8}$ that had been pressure amorphized at 7.5 and 5 GPa, respectively, in a multianvil press and recovered to ambient cond…
We have studied the frequency and voltage dependences of voltage-induced torsional strains in orthorhombic ${\text{TaS}}_{3}$ [V. Y. Pokrovskii, S. G. Zybtsev, and I. G. Gorlova, Phys. Rev. Lett. 98, 206404 (2007)] by measuring the modulation of the resonant frequency of an rf cavity containing the sample. The strain…
In this study, the porous zinc oxide (ZnO) films were deposited on SnO2:F coated glass substrate by sol-gel technique with zinc acetate as precursor, ethanol as solvent, and diethanolamine as chelating agent. Two sets of ZnO films with equal number of coatings and the same film thicknesses were deposited with various…
Collagen is a triple helical protein, highly hydrated in nature. Bella and Berman (J Mol Biol 1996, 264, 734) have reported the structure of the first hydration layer. Water molecules form bridges of different length around the POG repeats and self assemble into left-handed helical water threads. To explore the stabil…
Abstract To investigate how the molecular weight of poly(ether ether ketone) affected the crystallization behavior, the nucleophilic reaction synthetic technology was used to obtain poly(ether ether ketone) of different molecular weights and the trend of the molecular weight varying with the duration of the reaction.…
Crystals composed of micrometer size colloidal particles diffract light and are both of fundamental interest as well as having important applications as filters, sensors and photonic devices. Laser light is used to diffract from these crystals in close analogy to x-ray or electron diffraction used for atomic crystals.…
The effect of the surface on edge dislocation glide in the crystal with point defects both on the surface and in the bulk is studied theoretically. It is shown that the drag force of dislocation can be reduced by the image forces to several orders of magnitude in nanoscale region.
The crystal structure of the 2.5 hydrate MgSO 4 phase was determined by simulated annealing from laboratory X-ray powder diffraction data measured from 2-140 °2θ using CuKα radiation. The 2.5 hydrate is monoclinic, space group C2/c, with unit-cell parameters a = 18.8636(4) Å, b = 12.3391(2) Å, c = 8.9957(2) Å, β = 94.…
We study, by means of Γ -convergence, the asymptotic behavior of a variational model for dislocations moving on a slip plane. The variational functional is a two-dimensional multi-phase transition-type energy given by a nonlocal term and a nonlinear potential which penalizes noninteger values for the components of the…
In this work the properties of rice-hull-filled polypropylene (PP) composites were investigated with the purpose of enhancing adhesion between the polymer and the filler through the addition of w = 5 % PP-grafted-MA (CA). Composites containing w = 20 and 30 % rice hulls (RH), as well as composites with a certain amoun…
The Mn-substituted M-type Ba-ferrite (<TEX>$BaFe_{12-x}Mn_xO_{19}$</TEX>; x = 0, 2, 4, 6) powders were prepared by the HTTD (High Temperature Thermal Decomposition) method. The effect of <TEX>$Mn^{3+}$</TEX> Jahn-Teller ions on the magnetic properties has been studied by x-ray diffraction, vibrating sample magnetometr…
The excellent and characteristic capacitor performance of pure single-walled carbon nanotubes (SWNTs), which differ from conventional activated carbon electrodes, is reported. SWNTs with little bundling showed higher specific capacitance than activated carbons. High operating voltage can be expected for pure SWNTs wit…
Enzyme-loaded magnetic polyelectrolyte multilayer nanotubes prepared by layer-by-layer assembly combined with the porous template could be used as biomimetic nanoreactors. It is demonstrated that calcium carbonate can be biomimetically synthesized inside the cavities of the polyelectrolyte nanotubes by the catalysis o…
PbSUBx/SUBCdSUB1-x/SUBS films are prepared in the composition range of 0.05≤x≤0.25, using a chemical bath deposition growth technique under optimum conditions amide at realizing good photo response. The x-ray diffraction results show that the films are of PbS-CdS composite with individual CdS and PbS planes. The films…