Materials Literature
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Abstract Layered double hydroxide (LDH) with a Mg/Al molar ratio of 1:1 was synthesized by using a co‐precipitation method and its calcined product (CLDH) was obtained by calcination of the MgAl‐LDH at 500 °C. The sorption removal of Pb 2+ from solution was investigated, finding that both LDH and CLDH show good sorpti…
Tobacco (Nicotiana tabacum L. cv. Xanthi) plants exposed to toxic levels of zinc and cadmium excrete metals through their leaf trichomes (epidermal hairs) as Zn,Ca- and Cd,Ca-containing grains. Little is known about the nature and formation mechanism of these precipitates. The chemical, crystalline, and noncrystalline…
Genetic algorithm-assisted combinatorial chemistry (GACC) was implemented to search for new blue phosphors in seven cation systems, including CaO, MgO, BaO, SrO, B 2 O 3, P 2 O 5, and Eu 2 O 3 . The GACC process was followed by a series of fine-tuning processes based on conventional high-throughput screening employing…
Single-crystal Ti2AlN (0001) thin films were grown on (111) oriented MgO substrates kept at 830°C by ultrahigh vacuum dc reactive magnetron sputtering from a compound 2Ti:Al target in a mixed Ar∕N2 discharge. The effects of variations in the nitrogen partial pressure on the phase composition of the films were studied.…
The theory of orientational relaxation properties of certain individual segments in a dendrimer macromolecule depending on the generation number and the position of a given segment in the dendrimer was developed. The time dependence for the dipole moment after switching an electric field off and the frequency dependen…
The rapid and reversible dispersion of palladium nanoparticles is considerably enhanced if oxygen gas is present in the oxidizing step of the redox cycle. At 673 K oxidation of the Pd nanoparticles is too slow to compete with this dispersion and only occurs after the Pd particles undergo significant size/morphological…
The unique properties of carbon nanofibers (CNFs) make them attractive for numerous applications ranging from field emitters to biological probes. In particular, it is the deterministic synthesis of CNFs, which requires precise control over geometrical characteristics such as location, length, diameter, and alignment,…
Experimental data about both the liquid and the solid phases during seeded batch crystallizations of citric acid (CA) in water were obtained using in situ Raman spectroscopy and image acquisition. These experimental results were reported in a previous paper in this issue (Caillet, A., et al. Cryst. Growth Des. 2007, 7…
Chiral-bridged rod molecules (CBRs) that consisted of bis(penta-p-phenylene) conjugated to an opened or closed chiral bridging group as a rigid segment and oligoether dendrons as flexible segments were synthesized and characterized. In the bulk state, both molecules self-assemble into a hexagonal columnar structure, a…
This paper, the first of two companion papers, describes a new approach to the application of the statistical "enlargement law" to power cable insulation. The results of this work allow for selecting better insulation for medium or high voltage cables. The selection is based on the results of dielectric strength tests…
Abstract Rare earth (Nd, Y, La, Dy) stearates have been synthesized and used as single component catalysts for the polycondensation of dimethyl terephthalate, adipic acid and 1,4‐butanediol for the first time preparing biodegradable poly(butylene adipate‐ co ‐terephthalate) (PBAT) with high molecular weight. The micro…
Abstract Copiapite is a mineral of iron- and sulphate-rich acidic environments and has a general formula AFe 3+ 4 (SO 4 ) 6 (OH) 2 (H 2 O) 20 , where A = Fe 2+ , 2/3Fe 3+ , 2/3Al 3+ , Mg, Zn. The structure is built by infinite tetrahedral-octahedral chains and isolated octahedrally coordinated A sites. Our synthetic a…
A nanorobotic manipulation setup for the handling and characterization of carbon nanotubes (CNTs) is presented. The nanorobotic setup can be integrated into a scanning electron microscope (SEM) and various endeffectors may be attached to the manipulator either for CNT handling or characterization. The pick-and-place t…
The earliest stages of thermal oxidation of 6 nm diameter silicon nanoparticles by molecular oxygen are examined using a tandem differential mobility analysis (TDMA) apparatus, Fourier-transform infrared (FTIR) spectroscopy, time-of-flight secondary ion mass spectroscopy (ToF-SIMS), and X-ray photoelectron spectroscop…
A high-speed camera was used to record the motion of a fiber below both a melt-blowing slot die and a melt-blowing swirl die. These recorded images were processed to determine the frequency and amplitude of fiber motion during melt blowing. The operating variables investigated included polymer flow rate, air flow rate…
We report on a study of singlet-singlet annihilation kinetics in a series of Zn(II)-porphyrin-appended dendrimers, where the energy transfer efficiency is significantly improved by extending the molecular chain that connects the light-harvesting chromophores to the dendrimeric backbone with one additional carbon. For…
The authors have modeled magnetoelectric (ME) laminate sensor units by considering both the ME laminate and detection circuitry. Theory predicts and experiments confirm that the signal-to-noise ratio increases with increasing frequency in the low frequency range. Our findings provide useful insights into ME sensitivit…
Everything in nature is built upward from the atomic level to define limits and structures to everything. Nanomedicines marked the field of medicine from nanobiotechnology, biological micro-electromechanical systems, microfluidics, biosensors, drug delivery, microarrays to tissue microengineering. Since then nanoparti…
The phase diagram of KNbO3 was investigated by Raman scattering up to 30 GPa and from 10 to 500 K (750 K at 2 GPa). Macroscopic ferroelectricity vanishes on compression and the various ferroelectric solids, rhombohedral, orthorhombic and tetragonal (R–O–T), were found to exist in close domains of the pressure–temperat…
Polymer insulators made of silicone rubber (SIRs) can suffer from algal fouling in tropical and even temperate regions. The purpose of the present study was to understand the hydrophobic behavior and leakage current characteristics of algal- fouled SIR materials when exposed to wet and contaminated conditions. Salt-fo…