Materials Literature
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Abstract Poly(ε‐caprolactone) (PCL)/poly(amino ether) (PAE) blends were obtained by injection molding without any previous extrusion step in an attempt to (i) contribute to the knowledge of the relation between structure and mechanical properties in these type of blends composed of a rubbery and a glassy polymer and (…
Any technological breakthrough on storage, transportation, and distribution of hydrogen is urgently required to popularize hydrogen energy systems. In the present paper, organic chemical hydrides with appropriate characteristics (e.g., high storage capacities, facile reversibility, and being safe and cost-competitive)…
Homocitrate synthase (acetyl-coenzyme A: 2-ketoglutarate C-transferase; E.C. 2.3.3.14) (HCS) catalyzes the condensation of acetyl-CoA (AcCoA) and alpha-ketoglutarate (alpha-KG) to give homocitrate and CoA. Although the structure of an HCS has not been solved, the structure of isopropylmalate synthase (IPMS), a homolog…
The first-principles FLAPW (full potential linearized augmented plane wave) electronic structure calculations were performed for the Ag(5)Li(8) gamma-brass, which contains 52 atoms in a unit cell and has been known for many years as one of the most structurally complex alloy phases. The calculations were also made for…
Low-dimension (1D) semiconductor CdSe nanostructures, including nanosheets, nanoribbons, nanowires and branchlike, have been successfully synthesized in bulk quantities by a simple and low-cost process based on thermal evaporation of CdSe powders onto a silicon substrate. The temperature of the substrates and the conc…
Abstract Amine‐modified carbon micro/sub‐microtubes that encapsulate magnetite cores have been synthesized by decomposing a ferrocene/hexabromobenzene mixture in the presence of ammonia under solvothermal conditions at 250 °C for 24 h in a one‐step process. The as‐prepared carbon microstructures (NH 2 ‐ME‐CMTs) were 9…
Silicon nitride films were deposited by plasma-enhanced chemical-vapour deposition. The films were then implanted with erbium ions to a concentration of 8 x 10(20) cm(-3). After high temperature annealing, strong visible and infrared photoluminescence (PL) was observed. The visible PL consists mainly of two peaks loca…
Abstract The long‐afterglow phosphor SrAl 2 O 4 : Eu 2+ , Dy 3+ is liable to hydrolyze in water with deterioration of its luminescent properties. In this study, i n situ emulsion polymerization was first used to prepare phosphor coated with poly(methyl methacrylate‐ co ‐butyl acrylate) [P(MMA‐ co ‐BA)] to improve wate…
Abstract Poly(vinyl alcohol) (PVA)/water‐soluble chitosan (ws‐chitosan) hydrogels were prepared by a combination of γ‐irradiation and freeze thawing. The thermal and rheological properties of these hydrogels were compared with those of hydrogels prepared by pure irradiation and pure freeze thawing. Irradiation reduced…
Abstract The phosphorus‐containing acrylate monomer, 2‐acryloyloxyethyl diethyl phosphate (ADEP), was synthesized and applied to cotton fabric by using admicellar polymerization. Sodium dodecylbenzene sulfonate was used as the anionic surfactant. The film of polymerized monomer (PADEP) formed on the cotton surface was…
We present an accurate comparative analysis of N 2 adsorption at 77 K on nonporous silica and the pore wall surface of MCM-41 materials. The analysis shows that in the low-pressure region of N 2 adsorption obeys a peculiar mechanism governed by short-ranged forces, which makes the surface curvature effect on the N 2 a…
Abstract The morphological structure, glass transition, mechanical properties, and dynamic mechanical properties of star‐shaped solution‐polymerized styrene‐butadiene rubber (SSBR) synthesized by a multifunctional organic lithium initiator and SiO 2 ‐SSBR composite (N‐SSBR) prepared through adding a small amount of na…
A cost-effective and hazard-free sol−gel method for the synthesis of single-phase MgTiO 3 thin film is reported here, using (MgNO 3 ) 2 ·6H 2 O and TiC 16 H 36 O 4 as precursors and employing either acetic acid or acetyl acetone as the stabilizers for titanium n-butoxide. The effect of the stabilizers on the structure…
The method of step-by-step formation of correlated 3D phase optical structures is presented. Surface relief gratings (SRG) recorded in azobenzene polymer layers are alternated with layers of a spacer polymer with a different refractive index. A pair of azobenzene and spacer polymers with excellent compatibility makes…
Steam explosion technique was used to isolate banana fibrils from banana fiber. The surface polarity of banana fiber, banana fibril, and chemically-treated banana fibril was investigated by ultraviolet/visible spectroscopy using solvatochromic probe dye molecules. The empirical Kamlet-Taft solvatochromic polarity para…
The process and reaction mechanism of propane dehydrogenation in a proton-conducting fuel cell were studied at 600−700 °C using Y-doped BeCeO 3 as protonic electrolyte and Pt as electrode catalysts. The electrochemical dehydrogenation of propane was in competition with side reactions caused by the gas species (H 2, C…
We propose a surface treatment allowing one to obtain a sliding planar anchoring of nematic (or cholesteric) liquid crystals. It consists of depositing a thin layer of the polymercaptan hardener of an epoxy resin on an isotropic substrate (bare or ITO-coated glass plates). Microscopic observations of defect annihilati…
Using transmission and reflection measurements under normal incidence in one and three layers of a mum-scale metamaterial consisting of pairs of short-slabs and continuous wires, fabricated by a photolithography procedure, we demonstrate the occurrence of a negative refractive index regime in the far infrared range, ~…
Abstract A MEL‐type pure‐silica zeolite (PSZ), prepared by spin‐on of nanoparticle suspensions, has been shown to be a promising ultra‐low‐dielectric‐constant ( k ) material because of its high mechanical strength, hydrophobicity, and chemical stability. In our previous works, a two‐stage synthesis method was used to…
Single crystals of Dy(0.5)Sr(0.5)MnO(3) are grown using the optical floating zone technique, and their structural, magnetic, transport and thermal properties have been investigated. Magnetization measurements under field-cooled and zero-field-cooled conditions display irreversibility below 35 K. The magnetization does…