Materials Literature
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Stable aqueous solutions of ZnO@polymer core-shell nanoparticles with tunable photoluminescence are prepared through a simple sol-gel route. The copolymer shell has many hydrophilic external groups and a hydrophobic internal layer which connects ZnO cores through covalent bonds. The optimal samples show quantum yield…
Cellulose nanofibrils offer interesting potential as a native fibrous constituent of mechanical performance exceeding the plant fibers in current use for commercial products. In the present study, wood nanofibrils are used to prepare porous cellulose nanopaper of remarkably high toughness. Nanopapers of different poro…
A facile and scalable preparation of aqueous solutions of isolated, sparingly sulfonated graphene is reported. (13)C NMR and FTIR spectra indicate that the bulk of the oxygen-containing functional groups was removed from graphene oxide. The electrical conductivity of thin evaporated films of graphene (1250 S/m) relati…
Four dogs were treated for acute toxicity following ingestion of the popular garden shrub 'Yesterday, today, tomorrow' (Brunfelsia spp). Clinical signs included vomiting, diarrhoea, muscle tremors, anxiousness, opisthotonus and seizures. All dogs recovered following treatment with any or all of general anaesthetic, ga…
By using a phase-field model, we simulate formation and growth of stripe arrays starting with anisotropic growth of islands under the Ehrlich-Schwoebel barrier on metal bcc(110) surfaces. The anisotropy is incorporated in terms of attachment kinetics that is locally limited at the island edge aligned to the y axis (or…
The existence of an energy gap of graphene is vital as far as nano-electronic applications such as nano-transistors are concerned. In this paper, we present a method for introducing arbitrary energy gaps through breaking the symmetry point group of graphene. We investigate the tight-binding approximation for the dispe…
The unusual magnetic properties of thin films of Fe1−xCoxOy {0≤x≤1} ferrite solid solutions have been explained through an investigation of their electronic structure. The x-ray absorption near-edge structure (XANES) spectra of the Fe L3-edge and K-edges show that Co replaces Fe3+ in the tetrahedral (Td) sites up to x…
This work concerns the investigation of porous poly(phenylquinoxaline)s (PPQ) films. The approach described relies on the in situ generation of foaming agents during the thermal curing of dense thin films of PPQ-containing thermolabile groups. For this purpose, a series of phenol-containing PPQ has been previously syn…
Sodium alumino-phosphate glasses co-doped with Yb 3+ and Tm 3+ ions have been prepared with notably low OH − content, and characterized from the viewpoint of their spectroscopic properties. In these glasses, Yb 3+ acts as an efficient sensitizer of excitation energy at 0.98 µm—which can be provided by high power and l…
Surface phonon dispersion of [Formula: see text]-B was measured using high resolution electron energy loss spectroscopy. With adsorption of excess boron, an ordered structure of [Formula: see text] is found at the B coverage of about 0.8 ML. Another structure of 4 × 4 appears mixed with the [Formula: see text] phase a…
We report the effects of partial substitution of Ge onto the Ga sites of Fe 2 VGa by measuring electrical resistivity, Seebeck coefficient and thermal conductivity as a function of temperature. It is found that Ge substitution effectively dopes electrons to the system and thus causes a dramatic decrease in the electri…
We report a facile method to synthesize single crystalline copper 7,7,8,8- tetracyanoquinodimethane (CuTCNQ) nanostructures using the chemical vapor deposition (CVD) method. It was revealed that, through simply adjusting the temperature-rising rate in CVD process, the CuTCNQ nanostructures were controllable in both th…
The electronic structures and magnetic properties are reported for ordered and disordered Sr 2 CrMoO 6 presenting oxygen vacancies or/and antisite defects (ASs). We investigate the stability of an antiparallel (AP) magnetic moment on Cr antisites and the calculations show that these solutions are more stable relative…
Planar SOFC stack technology based on a unique concept (SOFConnex™) uses structured gas distribution layers between unprofiled metal sheet interconnects and thin Ni-YSZ anode supported electrolyte cells. The layers are flexible both in material and design and allow to implement new configurations relatively simply; ma…
The complex perovskite Ba(Yb 1/2 Ta 1/2 )O 3 has been prepared by the two‐stage solid‐state reaction method. Rietveld' refinement analysis indicates cubic perovskite phase with space group . The 1:1 cation ordering at the B‐site is revealed by the presence of (111) superlattice reflection in the X‐ray diffraction patt…
A photochromic microparticle was synthesized and the bistability of this system in nonpolar viscous medium was investigated. Incorporation of the photochromic spiropyran (SP) dye into a cross-linked polystyrene resin enhanced the thermal (24-fold) and photochemical (4-fold) stabilities of an otherwise unstable open, c…
The two-terminal magnetotransport of a single graphene layer was investigated up to a field of 55 T. The dependence of the electron transmission probability at the organo-metallic interface between the graphene and the metal electrodes was studied as a function of filling factor and electron density. A resistance-plat…
A nanotubular catalytic reactor composed of an parallel array of Pt-loaded polyoxometalates/polyelectrolyte nanotubes is presented. Pt/POM composite nanotubes with precisely controlled wall thickness as well as tube inside diameters are prepared by a layer by layer method. Negative-charged polyoxometalates (POMs) and…
The field-induced magnetostructural transformation in ${\text{Gd}}_{5}{\text{Ge}}_{4}$ was examined by magnetization measurements in pulsed magnetic fields. The low-temperature irreversibility of the transition can be destroyed by the magnetocaloric effect, and depending on the heat exchange between the sample and its…
Abstract A theoretical study on the mechanism of the thermal decomposition of a series of xanthates, O‐alkyl S‐methyl and S‐alkyl O ‐ methyl dithiocarbonates, has been carried out, and the alkyl groups being ethyl, isopropyl, and tert ‐butyl. Kinetically, these xanthates can be classified in two groups: those where th…