Materials Literature
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This study demonstrates a feasible and efficient route to alleviate the absorption problem of the terrestrial solar spectrum and enhance broadband luminescence from a promising down conversion powder phosphor YPO4 co-doped with Pr3+-Yb3+ lanthanide ion-couple: incorporating a third sensitizing transition metal ion, e.…
A predicted class of materials called hyperferroelectrics could prove more stable against the depolarizing internal electric fields known to impede ferroelectricity in thin films.
We consider the $\ensuremath{\nu}=0$ quantum Hall ferromagnetic state of bilayer graphene subject to a kinklike perpendicular electric field, which generates domain walls in the electronic state and low-energy collective modes confined to move along them. In particular, it is shown that two pairs of collective helical…
The spin Hamiltonian parameters (i.e., anisotropic g factors and hyperfine structure constants) and local tetragonal distortions for Cu2+ in crystalline and amorphous TeO2 and GeO2 are theoretically investigated using the high-order perturbation formulas of these parameters for a tetragonally elongated octahedral 3d9…
Based on the self-similarity property of fractal, two types of fractal gratings are produced according to the production and addition operations of multiple periodic gratings. Fresnel diffractions of fractal grating are analyzed theoretically, and the general mathematic expressions of the diffraction intensity distrib…
A liquid-bridge induced precisely positioning strategy for graphene patterning is reported. Owing to well-defined assembly of graphene, a flexible bending-sensitive circuit is generated, allowing electrons to stop/pass this graphene-based circuit depending on mechanical pressing/relaxing. The present approach may adva…
In order to investigate the influence of chemical compositions on the intergranular corrosion (IGC) resistance of the Super304H steel, the chemical compositions and IGC levels of as received Super304H tubes were analysed and evaluated respectively by spectral analysis, scanning electron microscopy and immersion test i…
Highly aligned, single‐layered hollow fibrous membranes are prepared using two‐fluid coaxial electrospinning (ES). Polyethylene oxide (PEO) is used as the core, and polyurethane (PU) and blends of PU with silica (SiO 2 ) are used as the shell to extract the PEO. The effects of the polymer‐complex concentration, the ES…
Electronic nematics, an electron orientational order which breaks the underlying rotational symmetry, were observed in iron pnictide superconductors several years after their discovery. However, the universality of the doping dependence of this phase and its relation to other symmetry-breaking orders (such as supercon…
This two-articles series presents an in-depth discussion of electrospun poly-L-lactide scaffolds for tissue engineering by means of statistical methodologies that can be used, in general, to gain a quantitative and systematic insight about effects and interactions between a handful of key scaffold properties (Ys) and…
To investigate self‐replenishing on surface‐structured composite coatings a dual simulation‐experimental approach is employed to study the decisive role of polymer‐air and polymer‐particle interfaces. Experimentally, the composite system consists of a cross‐linked polymer network with fluorinated‐dangling chains, embe…
This article proposes a new theory of X-ray scattering that has particular relevance to powder diffraction. The underlying concept of this theory is that the scattering from a crystal or crystallite is distributed throughout space: this leads to the effect that enhanced scatter can be observed at the `Bragg position'…
It is shown that pendant amino groups on polymers can be conveniently transferred into chemically and thermally very stable imidazolium linkages by using a simple modification of the Debus–Radziszewski synthesis, a cascade reaction involving two amines, one methylglyoxal and one formaldehyde monomer. It is shown that…
The availability of sensitive, reproducible, and stable substrates is critically important for surface-enhanced Raman spectroscopy (SERS)-based applications, but it presently remains a challenge. In this work, well-aligned zinc gallate (ZnGa2O4) nanorod arrays grown on a Si substrate by chemical vapor deposition were…
A one-step anisotropic etching method is developed to specifically obtain armchair-edged graphene directly from graphite flakes on various substrates. The armchair edge structure of the produced graphene is verified by the atomic resolution images obtained from the fluid mode peakforce tapping AFM and the relatively h…
Poly vinyl acetate (PVA)/Polyol were blended by weight 3:1. This is mixed with different percentages of prepared sulfonated-phenol formaldehyde resin (SPF). The mixture was prepared on clean glass substrate as a bulk films, at different thicknesses (0.1-0.18) cm. SPF was diagnosed by FTIR spectrophotometer. The curren…
Aqueous suspensions of nanotubes, as well as the structure and optical properties of their aggregates (bundles), are studied by spectroscopy and high-resolution electron microscopy. The structure of nanoparticles is controlled by varying the ultrasonication time during preparation of suspensions. It is found that the…
Rattan powder of 20 parts phr and kaolin filler ranged between 0 and 10 phr were incorporated into polypropylene to produce a hybrid composite. Processing study, mechanical, thermal stability and water absorption tests were carried out. Peak and stabilization torques, thermal stability and tensile modulus improved, wh…
Abstract A series of new gallium‐containing silicotungstates was obtained from the one step reaction of the lacunary Na10[α‐SiW9O34]·15H2O Keggin‐type building block (SiW9) with gallium nitrate in aqueous solution. The sandwich‐type polyoxotungstate [Ga6(H2O)x{α‐SiW9O34(OH)y}2]n–(1) crystallizes first as a mixture of…
Abstract First‐ and second‐generation pyridylimine‐terminated dendrimeric ligands were prepared by the reaction of the corresponding amine‐terminated aromatic polyamide dendrimers with 2‐acetylpyridine. The pyridylimine terminal groups were used as bidentate N , N ligands of nickel halide to prepare the corresponding…