Materials Literature
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Abstract A poly‐matrix composite—poly(sodium acrylate) (PSA)/hydrotalcite (HT) (PSA/HT) nanocomposite superabsorbent—with obvious improvements in both the water absorbency and salt absorbency has been prepared by the intercalated HT, using sodium methyl allyl sulfonate as an intercalation agent. The superabsorbents ac…
We carried out calculations to investigate the influence of thermal conductivity of the wall of a crucible on melt−crystal interface shape using three-dimensional global analyses. It was found that thermal conductivity of the wall of a crucible has significant influence on the melt−crystal interface shape due to modif…
The preparation and characterization of fully oxidized TiO 2 ultrathin films obtained by reactive deposition of Ti in an O 2 background on the (1×2)-Pt(110) reconstructed surface is described in details. The structure, the electronic properties, and the morphology of the epitaxial films giving rise to a (14×4) coincid…
Covalent functionalization of nanowires of TiO2, ZnO and Al2O3 has been carried out by employing the organosilicon reagents aminopropyltriethoxysilane and hexadecyltrimethoxysilane (HDTMS). The presence of the organosilane coating was confirmed by electron microscopy, energy dispersive X-ray analysis (EDXA) and IR spe…
Dielectric properties, spontaneous polarization, and phase transitions of the NH+...N bonded ferroelectric dabcoHBF4 (i.e., 1,4-diazabicyclo[2.2.2]octane tetrafluoroborate, [C6H13N2]+ BF4-) have been related to one-dimensional arrangement of the cations and to their conformational properties. The onset of conformation…
High-resolution angle-resolved photoemission measurements have been carried out on the $(\text{Sr},\text{K}){\text{Fe}}_{2}{\text{As}}_{2}$ superconductor $({T}_{c}=21\text{ }\text{K})$. Three holelike Fermi-surface sheets are resolved around the $\ensuremath{\Gamma}$ point. One electronlike Fermi surface and strong F…
We use charge sensing of Pauli blockade (including spin and isospin) in a two-electron 13C nanotube double quantum dot to measure relaxation and dephasing times. The relaxation time, T1, first decreases with parallel magnetic field then goes through a minimum in a field of 1.4 T. We attribute both results to the spin-…
Vorratshaltung: Ein μ-Oxo-μ-η2:η2-peroxotitan(salan)-Komplex (siehe Struktur; Ti violett, O rot, N blau, C grau) wurde aus dem entsprechenden Di-μ-oxotitan(salan)-Komplex mithilfe von 30-proz. Wasserstoffperoxid hergestellt. Der μ-Oxo-μ-η2:η2-peroxo-Komplex wird langsam in eine aktive Spezies des Katalysezyklus der as…
Pyridoxal 5'-phosphate-dependent enzymes may be grouped into five structural superfamilies of proteins, corresponding to as many fold types. The fold type I is by far the largest and most investigated group. An important feature of this fold, which is characterized by the presence of two domains, appears to be the exi…
A novel kind of hierarchical MgO nanostructure with bundles of nanowires, which were aligned onto six exposed planes of central cubic particles, was successfully synthesized by using a mixture of Mg, MgO, and carbon powder as source materials through the chemical vapor deposition (CVD) method. The evolution of the mor…
Magnetic Fe(2)O(3) nanoparticles coated with SiO(2) chemically doped with a Ru(II) complex were prepared using a simple solution based method. Field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) showed that the Fe(2)O(3) nanoparticles with a mean diameter of ∼115 nm were suc…
We investigate the electronic and other properties of the hypothetical compound LiFeSb in relation to superconducting LiFeAs and FeSe using density-functional calculations. The results show that LiFeSb in the LiFeAs structure would be dynamically stable in the sense of having no unstable phonon modes and would have ve…
We investigate the correlation between plasmon-enhanced nonlinear white-light emission and single-molecule surface-enhanced Raman scattering (SERS) on fractal silver films using a conjugated polymer as a versatile analyte. Single molecule resonance SERS is preferentially observed from sample positions which do not exh…
Abstract This report addresses the physical concept and the results of mathematical modeling of cryogenic layer degrading caused by its radiation heating during direct drive target injection into the reaction chamber. Special attention is paid to the influence of a solid layer structure on the roughening of the layer…
3,3'- and 4,4'-biphenylene-bridged subporphyrin dimers were synthesized by means of a Ni-catalyzed homocoupling reaction. Distinctly red-shifted absorption bands and enhanced fluorescence were observed only for the latter, indicating effective through-bond interactions through a 4,4'-biphenylene bridge, which is not p…
The in-plane conductance of individual graphene nanoislands thermally grown on SiC substrate was successfully measured using an integrated nanogap probe without lithographic patterning. A Pt nanogap electrode with a 30 nm gap integrated on the cantilever tip of a scanning probe microscope enables us to image a conduct…
Supercritical water (SCW) and steam were used to prepare activated carbon fibers (ACFs) to study the different behaviors of these two agents. The results showed that activation with SCW is much faster than with steam and that the lower activation energy observed when SCW is used suggests that the mechanism of gasifica…
We report the determination of the Kerr constant $(B)$ and the real part of the third-order nonlinear optic susceptibility $({\ensuremath{\chi}}^{(3)})$ above the nematic-isotropic phase transition temperature $({T}_{NI})$ of a liquid crystal composed of bent-shaped molecules. The values of $B$ and ${\ensuremath{\chi}…
Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise $f$-electron occupation. A comparison of the photoemission spectra with the energy-loss functions in bulk and surface, obtained from optical reflectivity, enables us to distinguish between the energy-lo…
The properties of a single semiflexible chain tethered to a planar surface with a long-ranged attractive potential are studied by means of Monte Carlo simulations. We employ the bond fluctuation lattice model and the Wang-Landau sampling technique. We present the diagram of states for semiflexible chains consisting of…