Materials Literature
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A simple method is introduced to prepare silver halide low-dimensional nanomaterials in water/oil (W/O) microemulsions. AgCl, AgBr nanoparticles and AgI nanoparticles/nanorods/nanowires are respectively synthesized. The reactant molar ratio plays an important role on the morphology of AgI nanomaterials. The possible r…
The template- and catalyst-free synthesis of well-aligned nc-Si/SiOx composite nanowires (see Figure) is reported. Hot filament chemical vapor deposition on a catalyst-free substrate using a SiCl4/H2 mixture is the method used. Investigation of the photoluminescence characteristics of these composite nanowires reveals…
Abstract CaCO 3 –polyethylene (PE) compositions, containing an ultrahigh molecular polyethylene (UHMPE) interlayer between the filler surface and the PE matrix, were synthesized by two‐step polymerization of ethylene on a filler surface activated with a suitable catalyst. The properties of the compositions were studie…
The electrical and magnetic properties of manganese ferrite $({\mathrm{MnFe}}_{2}{\mathrm{O}}_{4})$ are calculated with the density-functional theory (DFT) method for both normal and inverse spinel structures. The exchange functional is chosen to be a mixture of Becke exchange and Fock exchange with variable weight (w…
Reversible magnetization measurements, micromagnetic modeling, the temperature dependence of coercivity, and magnetic viscosity measurements have been used to clarify the magnetic reversal mechanism of ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ particles contained in a Nd matrix. The coercivity was observed to in…
Abstract This article describes the chemical modification of polyethylene terephthalate (PET) with a variety of compounds containing reactive glycidyl group(s). Four different modifiers, namely, diglycidyl ether of bisphenol‐A (DGEBA), N , N ′‐bis[3(carbo‐2′,3′‐epoxypropoxy) phenyl] pyromellitimide (BGPM), triglycidyl…
Resistivity, optical, and angle-resolved photoemission experiments reveal unusual one-dimensional electronic properties of highly anisotropic ${\mathrm{S}\mathrm{r}\mathrm{N}\mathrm{b}\mathrm{O}}_{3.41}$. Along the conducting chain direction, we find an extremely small energy gap of only a few meV at the Fermi level.…
We have observed polymersomes of high genus with their vesicle wall organized on the micrometer scale either in a double bilayer connected by a lattice of passages or a tubular network with hexagonal symmetry. Experimentally found shape classes are identified within a theoretical phase diagram based on the bending ene…
Sequential atomic rearrangements leading to the coalescence of fullerene cages or tubes are derived by topological analysis. Qualitative reasoning assists the search for the minimum-energy path, which consists of a jump-to-contact formation of covalent bonds between the separate cages and the following ``plastic flow'…
In this paper, we report our results on the sol–gel preparation and spectral properties of (RE x Y 1− x ) 2 SiO 5 (RE 3+ = Eu 3+ , Tb 3+ , Ce 3+ , x = 0.005, 0.01, 0.02, 0.03 and 0.05) thin films. Effects of annealing temperatures on the thin films structure and optical properties, including luminescence, decay kineti…
The orbitally ordered state of ${\mathrm{YTiO}}_{3}$ has been investigated utilizing resonant x-ray scattering (RXS) near the Ti K-edge. The RXS intensities have been observed at the $1\stackrel{\ensuremath{\rightarrow}}{s}4p$ dipole transition energy (the main edge). The atomic scattering tensor of the Ti ion has qua…
We extend the conventional mode-coupling theory of supercooled liquids to systems under stationary shear flow. Starting from generalized fluctuating hydrodynamics, a nonlinear equation for the intermediate scattering function is constructed. We evaluate the solution numerically for a model of a two-dimensional colloid…
Synthetic routes to zinc complexes supported by sterically demanding bis(phosphinimino)methyl ligands are reported. Two aryl-substituted ligand precursors have been utilised, [CH2(Ph2PNC6H2Me3-2,4,6)2], 1, and [CH2(Ph2PNPh)(Ph2PNC6H2Me3-2,4,6)], 2. The second of these is the first example of an asymmetric bis(phosphin…
Nanowires are created by nucleation of nanometer-scaled noble metal particles on microtubules formed from highly ordered protein assemblies. The periodic functional groups of amino acids serve as active sites for nucleation and binding of the metallic nanoparticles to form ordered patterns of particles, which, by furt…
Sponge-like bicontinuous morphologies (see Figure and also cover) are ubiquitous in the physical and biological sciences, but are only qualitatively understood in terms of their structure. Here, 3D imaging techniques are used to explore the characteristics of such morphologies at the nanoscale, microscale, and macrosc…
The engineering versatility of molecular organic materials, together with their attractive electronic, magnetic, and optical properties, have triggered their preparation as thin films in the last years. Although the interactions between molecules and inorganic substrates are rather weak (van der Waals, hydrogen bondin…
The mass spectra of trimethylsilyl (TMS) derivatives of possible hydroxylated pyrolysis products of glucose and cellulose were recorded by gas chromatography/mass spectrometry (GC/MS) analyses of TMS derivatives of 2-hydroxymethylfuran, 2-hydroxy-1-methyl-1-cyclopenten-3-one, 5-(hydroxymethyl)-2-furaldehyde, 5-methyl-…
We analyse the effect of the applied field (Happl) on the current-driven magnetization reversal in pillar-shaped Co/Cu/Co trilayers, where we observe two different types of transition between the parallel (P) and antiparallel (AP) magnetic configurations of the Co layers. If Happl is weaker than a rather small thresho…
The anomalous Hall coefficient Rs has been studied for the reentrant spin glass system Fe0.7Al0.3 by measuring the magnetization M and the Hall resistivity r_H. We have found that R_s exhibits anomalous temperature dependence at the spin-glass transition temperature T_G, indicating that an additional term appears alon…
We investigate the vortex state in a two-band superconductor with strong intraband and weak interband electronic scattering rates. Coupled Usadel equations are solved numerically and the distributions of the pair potentials and local densities of states are calculated for two bands at different values of magnetic fiel…