Materials Literature
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The possibilities of effective solutions of relevant technological problems are considered based on the analysis of fundamental physical aspects, elucidation of the micromechanisms and interrelations of aging and hydrogen embrittlement of materials in the hydrogen industry and gas-main industries. The adverse effects…
The unsaturated polyester-based hybrid composites were developed by combining the kapok and glass fabrics into polyester matrix. This study describes the flexural, compressive, and interlaminar shear resistance properties of kapok/glass polyester composites with and without alkali treatment of fabrics. These propertie…
Radikal mild: Der erste bei Raumtemperatur isolierbare, strukturell charakterisierte Superoxonickel(II)-Komplex 1 mit quadratisch-planarem, vierfach koordiniertem NiII-Zentrum ist zu milden Sauerstoffübertragungen über das postulierte Intermediat 2 in der Lage, das unter H-Abstraktion zum homovalenten Komplex 3 mit ei…
Layered assemblies of single crystal gold nanoplates are directly synthesized in large scale by simply adding aniline to HAuCl 4 −HCl aqueous solution at room temperature, without the need of extra capping agent or surfactant. In this approach, the large amount of Cl −, the oxidative etching by the O 2 /Cl − pair, the…
Magnetic measurements of ${\text{La}}_{0.7}{\text{Ca}}_{0.3}{\text{MnO}}_{3}$ reveal a departure from Curie-Weiss behavior below the orthorhombic (O) to rhombohedral (R) structural transition at ${T}_{O\ensuremath{-}R}=705\text{ }\text{K}$. Between ${T}_{O\ensuremath{-}R}$ and ${T}^{\ensuremath{\ast}}=273\text{ }\text…
Plasmas generated at atmospheric pressure are used to functionalize the surfaces of polymers by creating new surface-resident chemical groups. The polymers used in textiles and biomedical applications often have non-planar surfaces whose functionalization requires penetration of plasma generated species into sometimes…
Binuclear complex [Cp* 2 Ir 2 (μ-CA)Cl 2 ] ( 2 ) (CA = chloranilate) was obtained by the reaction of [Cp*IrCl 2 ] 2 ( 1 ) with H 2 CA in the presence of base. Treatment of 2 with pyridine or 4-(4-bromophenyl)pyridine in the presence of AgOTf (OTf = CF 3 SO 3 ) in CH 3 OH gave the corresponding binuclear complexes [Cp*…
Morphological, textural, and surface properties of several Pt−Ba/Al 2 O 3 NO x storage reduction (NSR) catalysts at different Ba loading in the range 0−30 wt % were characterized by means of X-ray diffraction, high-resolution transmission electron microscopy, and Fourier-tranform infrared (FT-IR) spectroscopy using CO…
We report on depolarized light scattering spectra from suspensions of gold nanorods in terms of the depolarized ratio Ivh/Ivv measured from 400 to 900 nm. For separated, highly monodisperse and highly monomorphic samples, we observed spectra with an unprecedented depolarization ratio with a resonance maximum of about…
We present ab initio calculations for atomic oxygen adsorption on Ir(111) for a wide range of oxygen coverages, $\ensuremath{\Theta}$, namely from 0.11 to 2.0 monolayers (ML), including subsurface adsorption and thin surface-oxide-like structures. For on-surface adsorption, oxygen prefers the fcc-hollow site for all c…
The growth mechanism of Si-faceted dendrite was studied using an in situ observational technique. We directly observed the growth processes of Si-faceted dendrites from Si melts. It is found that triangular corners with an angle of 60 degrees are formed at the dendrite tip. We present an original growth model for face…
Hessian cloth (jute fiber)-reinforced polypropylene (PP) composites were prepared by compression molding. The fiber content in the composites was about 50%. The resulting composites and also PP sheets were irradiated under gamma radiation of various total doses (250—1000 krad) at the rate of 600 krad/h. It was found t…
A convenient synthetic route based on the concept of nanoreactors using the versatility of the miniemulsion technique to synthesize glutardialdehyde cross-linked gelatin nanoparticles with tailored properties is reported. It is demonstrated that, independent of the molecular weight distribution of the gelatin used, st…
Chemical surface modifications involving 1% sodium hydroxide (NaOH) and 1% acrylic acid (AA) treatments are applied to woven banana fabric and it is used as reinforcement in an unsaturated polyester matrix. Vacuum bagging technique was used to prepare the woven banana fiber-reinforced unsaturated polyester composites…
We used the electrospinning technique to produce fibrous scaffolds of poly(methyl methacrylate) (PMMA). Using a rotating drum, we aligned the fibers and formed multilayered structures where both the fiber spacing and pore size could be varied. We then plated adult human dermal fibroblasts and studied the effect of fib…
Reconstruction of large bone defects is still a major problem. Tissue-engineering approaches have become a focus in regeneration of bone. In particular, critical-sized defects do not ossify spontaneously. The use of electrospinning is attracting increasing attention in the preparation of tissue-engineering scaffolds.…
We examine the spin-triplet superconducting state of even parity mediated by ferromagnetic Hund's coupling between electrons in two almost degenerate orbital bands. This state may be realized in the recently discovered LaFeAsO(1-x)F(x). It is robust against orbital-independent disorder. The splitting of the orbital de…
Graphene became the first and is the most vivid representative of a new class of materials. Graphene has opened a new scientific paradigm that can be studied under ordinary laboratory conditions. Graphene is a two-dimensional semiconductor with a zero-width band gap. Quasi-particles in graphene are formally described…
Back and forth: A concerted reversible redox reaction occurs in a pure metal oxide extended polyoxometalate framework when the accessible pockets are filled with a suitable redox agent (see picture). Direct control over the framework properties is demonstrated by repeated reversible switching between an expanded and a…
Poly(ester-urethane)s (PUs) were synthesized using hexamethylene diisocyanate (HDI) or toluene diisocyanate (TDI) to join short chains (M(n) = 2000) of poly(R-3-hydroxybutyrate) (PHB) diols and poly(epsilon-caprolactone) (PCL) diols with different feed ratios under different reaction conditions. The multiblock copolym…