Materials Literature
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Abstract Available literature data on aggregation kinetics of crystals of a number of salts during their bulk crystallization from solutions have been analysed. The proposed earlier mechanism of aggregation and intergrowth of crystals during bulk crystallization owing to formation of nucleus‐bridges between crystals w…
The present work combines periodic density functional theory (DFT) calculations of thermodynamic properties and experimental synthesis to explore the ternary (Li, Na, K) phase diagram of Li x Na y K 3− x − y AlH 6 hexa-alanates. About 70 virtual phases, of various possible structures and different alkali metal composi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTEvidence of Lateral Nanoscale Heterogeneities in Weak Polyelectrolyte BrushesKevin N. Witte†, Jaehyun Hur†, Wei Sun, Sangtae Kim, and You-Yeon Won*View Author Information School of Chemical Engineering, Purdue University, West Lafay…
Eutectic melt solidification is shown to avoid cracking during solidification by quenching an amorphous phase. Subsequent annealing results in micro/nanostructure ceramics. This strategy has been applied to HfO 2 –Al 2 O 3 –GdAlO 3 and Y 2 O 3 –CaO–Al 2 O 3 ternary systems that have deep eutectics. In most cases, cera…
A simple triblock copolymer, mPEG750-aniline pentamer-mPEG750, was prepared by condensation polymerization. The solubility of aniline pentamer in this kind of copolymer was improved in common solvents especially in aqueous solution, and the electroactivity of this copolymer was confirmed by UV-vis and CV in aqueous so…
This article contains an in-depth study of the kinetics of O 2 desorption from preoxidized size-selected gold nanoparticles (NPs) of average size ∼1.5 and ∼5 nm synthesized by micelle encapsulation and supported on SiO 2 . Thanks to the narrow NP size distributions achieved using our preparation route, information on…
Functionalization of single-walled carbon nanotubes through cycloaddition reactions constitutes an effective route to obtain novel nanostructured materials with interesting properties. In this paper, we perform density functional theory calculations on Diels-Alder reactions at the sidewall of armchair, zigzag and chir…
Abstract The influences of intensity of ultraviolet (UV) light, light‐barrier property of packaging film on the fat photo‐oxidation and accelerated shelf life of cookies were studied. Unpacked cookies were stored at a temperature of 408C and a relative humidity (RH) of 50% for 10 to 65 days, with an intensity of the U…
Abstract The effects of electron beam irradiation on backyard composting behaviour of polylactic acid (PLA) polymer were evaluated. Samples (10 mm 2 × 0.75 mm) from thermoformed PLA drinking cups were exposed to 10 MeV electron beam irradiation at doses of 0, 72, 144 and 216 kGy. Irradiated PLA samples were placed in…
We have measured the resistivity of PrFeAsO 1− x F y samples over a wide range of temperature in order to elucidate the role of electron–phonon interaction on normal- and superconducting-state properties. The linear T dependence of ρ above 170 K followed by a saturation-like behavior at higher temperature is a clear s…
The formation of hydrogen-bonded interpolymer complexes between poly(acrylic acid) and poly(N-vinyl pyrrolidone) as well as amphiphilic copolymers of N-vinyl pyrrolidone with vinyl propyl ether has been studied in aqueous and organic solutions. It was demonstrated that introduction of vinyl propyl ether units into the…
Abstract Neutron powder diffraction patterns were recorded on CaMn 1‐x Cu x O 3 (x = 0 and 0.20) compounds at different temperatures down to 11K. All the patterns were analyzed by employing Rietveld refinement technique and using the Fullprof program. The observed crystallographic peaks could be refined by using Pbnm…
The effects of various reaction conditions including temperature (200−240 °C), pressure (20−50 bar), and H 2 /CO molar feed ratio (1−2) on the performance of the liquid-phase direct dimethyl ether (DME) synthesis from syngas, over a bifunctional catalyst (CuO/ZnO/Al 2 O 3 + H-ZSM-5) have been studied. The experiments…
Multiferroic BiFeO 3 films have been grown on LaNiO 3-x /SrTiO 3 and Pt/Si substrates by RF magnetron sputtering.The films showed fully saturated ferroelectric hysteresis loops with large remanent polarization of 64 µC cm -2 , suitable for most device applications.Piezoresponse force microscopy confirmed that the film…
Thioesters are more reactive than oxoesters, and thioester chemistry is important for the reaction mechanisms of many enzymes, including the members of the thiolase superfamily, which play roles in both degradative and biosynthetic pathways. In the reaction mechanism of the biosynthetic thiolase, the thioester moietie…
Abstract Two sandwich‐type heteroleptic tetrapyrrole cerium complexes, Ce 2 (dap) 2 (pc) ( 1 ) [dap = 2,8,12,18‐tetraethyl‐3,7‐13,17‐tetramethyl‐5,15‐diazaporphyrinate; pc = phthalocyaninate] and Ce(dap)(oep) ( 2 ) (oep = octaethylporphyrinate), were prepared by a one‐pot reaction of [Ce(acac) 3 ] · n H 2 O (acac = ac…
Abstract Simple blending of natural rubber/ethylene–propylene–diene rubber (NR/EPDM) generally results in inferior mechanical properties because of curative migration and their differences for filler affinity. In this work, the 70/30 and 50/50 NR/EPDM blends prepared by reactive processing techniques were investigated…
Certain transition metal oxides exhibit relatively large compositional changes in response to variations in the oxygen partial pressure. In thin film form, these composition changes can lead to stress because of the constraint imposed by the underlying substrate. To investigate these effects, polycrystalline titania (…
The formation of calcite in the mollusk shell prismatic layer requires the participation of various proteins. Recent studies indicate that the prismatic-associated protein superfamily, Asprich, is capable of in vitro stabilization of amorphous calcium carbonate (ACC), a precursor phase of prismatic calcite. To learn m…
Abstract Crystal‐based finite element methods (FEM) are versatile continuum approaches for predicting mechanical properties and deformation‐induced crystallographic textures. They can be applied to both, elastic–plastic and elastic problems. The methodology is based on (i) a detailed understanding of the underlying cr…