Materials Literature
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The (Au,Ag)/Nb-1.0 wt %-doped SrTiO3 (NSTO), i.e., Au/NSTO, Ag/NSTO, Ag/Au/NSTO, and Au/Ag/NSTO junctions were fabricated by magnetic controlled sputtering and annealing process. Backward diodelike behaviors were observed in all as-prepared samples, and forward rectifying characteristics were gradually developed in th…
Graphene/polypyrrole composites are synthesized by in situ polymerization under different mass ratios. The electrochemical performances of graphene, polypyrrole and composites have been investigated. The composites corresponding to the mass ratio 50:50 of graphene to pyrrole deliver an initial capacitance of 223 F/g a…
The microphase separation and morphology of a nearly symmetric A(0.3)B(0.3)C(0.4) star triblock copolymer thin film confined between two parallel, homogeneous hard walls have been investigated by self-consistent mean field theory (SCMFT) with a pseudospectral method. Our simulation experiments reveal that under surfac…
Abstract Biobased cyanate ester (CE) nanocomposites have been prepared from renewable resource, epoxidized soybean oil (ESO) and in situ generated nano‐silica via sol–gel process. The isothermal curing process was investigated by differential scanning calorimetry (DSC) and rheometry. The results indicate that the inco…
We report the magnetism and electrical transport properties of La doped Ca2FeMoO6 double perovskite. Reduction in magnetic moment, nonmonotonic variation in magnetic ordering temperature (TC), increasing magnetic hardness, low temperature resistivity upturn, and loss of metallic conductivity are some of the major chan…
We devised a new process for fabricating an artificial nacreous structure on a natural nacre substrate. A film of alternating layers of natural nacre-like aragonite (CaCO 3 ) and poly(acrylic acid) (PAA) was fabricated directly on an aragonitic nacre substrate from a solution at room temperature. Alternate repetition…
Abstract Metallocene polyethylene (mPE)/silica nanocomposites were prepared via melt mixing. Two types of commercial fumed nanosilica, bare silica (A200) and organic modified silica (R974), were incorporated to improve the mechanical properties of the nanocomposites. Transmission electron microscopy, atomic force micr…
We have conducted a thorough investigation of the luminescence spectrum of Cr3+ in CaY2Mg2Ge3O12. The spectrum presents a line whose width is 60 cm−1 at 25 K and 82 cm−1 at 200 K, and a number of peaks of vibronic origin superimposed on a large band that extends from 700 to 800 nm. Going up in temperature the superimp…
Abstract A co‐polysiloxane has been prepared with an asymmetric bent side group based on a liquid‐crystalline monomer showing a B 2 (SmCP) phase. In order to dilute the side chain mesogens along the polymer backbone, octyl side chains were also incorporated. X‐ray studies confirmed that the resulting co‐polysiloxane e…
Both chitosan and polylactide/polyglycolide have good biocompatibility and can be used to produce tissue engineering scaffolds for cultured cells. However the synthetic scaffolds lack groups that would facilitate their modification, whereas chitosan has extensive active amide and hydroxyl groups which would allow it t…
The dielectric behavior of (Pb1−x/2Lax)(Zr0.9Ti0.1)O3 PLZT 100x/90/10 (0≤100x≤1) was studied in the frequency range 102–1014 Hz using dielectric, time-domain terahertz (THz), far-infrared, and Raman spectroscopy in the temperature interval 10–900 K. PZT 90/10 and PLZT 2/90/10 undergo two phase transitions, from a cubi…
Previous studies of tri-n-butylborane–initiated graft copolymerization of methyl methacrylates with hydrated proteinous materials and proteins have focused on the number of grafted-poly (MMA) branches as well as the percent graft and graft efficiency. The number of branches in silk fibroin is 1.3, whereas the number i…
Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lac…
We propose that novel oxide superlattice structures of crystalline TiO(2)/ZnO on sapphire substrates can be used for multilayer mirrors with high reflectivity at 2.734 nm. In the experimental study, both rutile TiO(2)(200) and wurtzite ZnO(001) thin films were grown epitaxially on the same sapphire (001) substrate by…
The synthesis, structures, and magnetic properties of several Pd(II) and Pt(II) complexes of verdazyl radicals are presented. Reactions of bidentate verdazyl radicals with (RCN)2MCl2 (R = Me or Ph; M = Pd or Pt) produced square planar (verdazyl)MCl2 complexes, three based on palladium and two on platinum. Solution spe…
Abstract The success of in situ polymerizations, measured by means of high polymerization activity, uniform exfoliation and clay dispersion in the polymer matrix, and good powder morphology, depends on how well the catalyst is supported onto the clay surface. A novel catalyst supporting method that does not require th…
In the emission cross section (σemi) calculation of rare-earth ions (RE3+), two parameters, zero-line energy (Ezl) and partition function of lower and upper states (Zl/Zu), are very difficult to be determined. This induces large discrepancy of σemi value, especially for RE3+ with large Stokes shift such as Tm3+. Based…
We demonstrate that silver/porous-Si nanocomposite powders are obtained by etching Si powders with metal assisted electroless chemical reaction in an aqueous solution of AgNO3 and HF. From x-ray photoelectron spectroscopy and scanning electron microscope measurements, metal layer consisting of nanometer-sized Ag parti…
Three esters of maltose (A1–A3) with 4–(4–(alkoxybenzoyloxy)phenoxy) –6–oxohexanoic acid (b1–b3) side-arms have been synthesised. All the maltose derivatives were laevo-rotationary, unlike their parent cores. The side arm b1 did not display liquid crystalline (LC) properties, and b2 and b3 displayed thermotropic nemat…
Abstract Using the comb copolymer PVDF ‐g‐ AAc as a compatibilizer, five reactively compatibilized PVDF/TPU blends with different compositions were prepared. During melt blending, the carboxylic acid groups of PVDF ‐g‐ AAc react with the urethane linkages of TPU to generate the graft copolymers PVDF ‐g‐ AAc ‐g‐ TPU, w…