Materials Literature
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First-principles calculations are employed to study the surface relaxation and electronic structure of the fully relaxed SrTiO(3) (001) oxygen-vacancy surfaces with both Sr and Ti terminations. In contrast to the perfect surface, the larger surface rumples and smaller interlayer distances have been found. Some in-gap…
BiScO 3 –PbTiO 3 (BSPT) thin films near the morphotropic phase boundary were successfully fabricated on Pt(111)/Ti/SiO 2 /Si substrates via an aqueous sol–gel method. The thin films exhibited good crystalline quality and dense, uniform microstructures with an average grain size of 50 nm. The dielectric, ferroelectric,…
Abstract Silver nanoparticles were formed in situ along with poly(2,5‐dimethoxyaniline) (PDMA) in an interconnected network matrix (reactor), comprising the electronic conductive polymer, PDMA, and a polyelectrolyte, poly(styrene sulfonic acid) (PSS), through the simultaneous reduction of Ag + ions and polymerization…
The KxTiyNi1−x−yO system in the series AxTiyNi1−x−yO (A=Li, K, Na; x=0.05–0.30, y=0.02) shows the highest dielectric constant ε′∼105 and lowest loss. The high ε′ value is attributed to microstructures, which form boundary layer capacitors. Electrical conductivity in these materials follows small polaron hopping mechan…
Microstructure development in Bi 0.5 (Na 0.5 K 0.5 ) 0.5 TiO 3 prepared by a reactive‐templated grain growth process was dependent on the sizes of platelike Bi 4 Ti 3 O 12 (BiT) and equiaxed TiO 2 particles used as starting materials. Calcined compacts were composed of large, platelike template grains and small, equia…
Using the molecular dynamics method, the stability of small He-vacancy clusters is studied under the condition of the high He and low vacancy densities. The result shows that there is a competition between He atoms detrapped and self-interstitial atoms (SIAs) emitted during the clustering of He atoms. When the He numb…
A formulation of continuum mechanics within the context of general relativity is presented that allows for the incorporation of certain types of anelastic material behaviour, such as viscoelasticity and plasticity. The approach is based on the concept of a four-dimensional body-time complex structured as a principal b…
The arrangement of nanostructures into desired well-ordered architectures is crucial for the realization of functional nanodevices and has been the focus of current nanotechnology. Existing physical and chemical approaches have the ability to assemble nanostructures, but it is still a challenge to arrange basic nanost…
Mössbauer measurements at different temperatures are reported for MWCNTs with metallic encapsulations ("nanowires"). The spectra can reasonably be refined with two subpatterns: one providing clear evidence of an iron carbide Fe(3)C (cementite) phase as the main nanowire component and the other yielding a relaxation do…
Experimental studies of Ge nanocrystals embedded in SiO(2) films doped with Er and Yb deposited by rf-magnetron sputtering are presented. Although inter-band photoluminescence (PL) from the Ge nanocrystals is not observed, it is nevertheless found that the presence of Ge nanocrystals is crucial for obtaining light emi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of a High Molecular Weight Fluorinated Poly(phthalazinone ether) by Self-Condensation of an AB-Type MonomerXiuhua Li and Allan S. HayView Author Information Department of Chemistry, McGill University, Montreal, Quebec H3A…
We present a simple solvent-assisted capillary molding method to fabricate zinc oxide (ZnO) nanostructures using an ultraviolet (UV) curable polyurethane acrylate (PUA) mold. A thin film of the ZnO sol-gel precursor solution in methyl alcohol was prepared by spin coating on a solid substrate and subsequently a nanopat…
Poly (D,L-lactide)-7co-(1,3-trimethylene carbonate) [P(DLLA-co-TMC)] (83 mol % DLLA) was used to produce matrices suitable for tissue engineering of small-diameter blood vessels. The copolymer was processed into tubular structures with a porosity of approximately 98% by melt spinning and fiber winding, thus obviating…
A new concept of multi-level assemblies of nanorod-based structures has been proposed, which could give new insight into the construction of nanorod-based complex structures from the bottom up. Multi-level architectures of complex lead sulphide (PbS) nanorod-based structures have been realized by a simple and general…
Abstract Hydrogen‐bonding interactions are an important alternative to electrostatic interactions for assembling multilayer thin films of uncharged components. Herein, a new method is reported for rendering such films stable at pH values close to physiological conditions. Multilayer films based on hydrogen bonding are…
Single crystals of MnSiN 2 have been obtained in dimensions up to several millimeters via a vapor−liquid−solid (VLS) crystal growth mechanism. Detailed single-crystal structure investigations have been carried out. The atomic structure was refined using the space group symmetry Pna 2 1 and the unit cell parameters a =…
Abstract Summary: Silk fibroin cast film was prepared using a ternary solvent system of CaCl 2 /CH 3 CH 2 OH/H 2 O (1/2/8 in mole ratio). A drying temperature at casting influenced crystal structure of fibroin. When a drying temperature was set lower than 9 °C, the cast film became amorphous. When a drying temperature…
A possibility for an additional family of intermetallic perovskite superconductors ${\mathrm{Sc}}_{3}X\mathrm{B}$, with $X=\mathrm{Tl}$, In, Ga, and Al, is presented as a result of Korringa-Kohn-Rostoker (KKR) electronic structure and pseudopotential phonon calculations. The large values of computed McMillan-Hopfield…
A zirconia suspension containing 5–10 nm size zirconia particles was modified by adding different amounts of polymer solution to enable electrospinning of zirconia fibers from a range of compositions. The electrospun fibers were heat treated at 600° and 1200°C, and analysis of size distribution reveals that zirconia f…
The tetra-(8-hydroxyquinolinato) boron complex (Bq) and 3,3',4,4'-benzophenone tetracarboxylic anion (BPTC) were successfully intercalated into layered double hydroxides with an ion-exchange method. Elemental analyses, powder X-ray diffraction, FTIR spectra, and thermogravimetric analyses indicated that the hydrotherm…