Materials Literature
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Polyester films are modified with their bioactivity for tissue engineering by grafting a nano-structured bioactive material, nano-structured chitosan (nano-CS), on a model polymer, poly (epsilon-caprolactone) (PCL). The nano-CS was duplicated using a solvent-etched PCL mold and then grafted onto PCL using a selected s…
Patterned multilayer films composed of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrenesulfonate) (PSS) were prepared using dip and spin self-assembly (SA) methods. A silicon substrate was patterned with a photoresist thin film using conventional photolithography, and PAH/PSS multilayers were then deposi…
Abstract Silk fibroin films with various calcium chloride contents were prepared by a cast film method and subsequent MeOH treatment. The conformational changes from α‐helix to β‐sheet structure were analyzed by Fourier transformed infrared attenuated total reflection spectroscopy measurements. The films obtained were…
Atomic-scale microstructure changes of carbon nanotubes under high bias∕high current conditions were studied by in situ high-resolution transmission electron microscopy. We found that high bias voltage caused significant structure changes, such as crystallization and elimination of amorphous coating on the surface of…
We report the fabrication process and the electrical characteristics of a nanocapacitor structure using metal-insulator-carbon nanotube-metal layers. The structure shows high capacitance and the possibility of ultrahigh integration density due to the unique nanotube structure. Nanoscale and high-aspect-ratio patterns…
Polycrystalline Ba2MnWO6 (BMW) and Sr2MnWO6 (SMW) samples were studied between 80 and 1200 K by Raman scattering spectroscopy. In the case of BMW (space group Fmm), four Raman active vibrational modes, predicted by factor group analysis, were identified. Raman scattering studies with different wavelengths revealed a r…
The crystallization of two diblock copolymers, one forming a cylindrical mesophase and the other a spherical mesophase in which the crystallizable unit, polyethylene, is the minority component, has been followed in situ using high-temperature atomic force microscopy. Contrast is obtained between the crystallizable and…
Catalyst-doped sodium aluminum hydrides have been intensively studied as solid hydrogen carriers for onboard proton-exchange membrane (PEM) fuel cells. Although the importance of catalyst choice in enhancing kinetics for both hydrogen uptake and release of this hydride material has long been recognized, the nature of…
A series of bis(pyridyl) acceptor emitters are synthesized and the LC and photophysical (PL and EL) properties of their supramolecular structures, including H-bonded polymer networks and trimers, are explored. Unique mesomorphic properties may be introduced into these H-bonded complexes and polymers containing nonmeso…
Abstract In today's world, technology for capacitors has grown significantly with its requirements in the direction of better dielectric properties. Developing an ideal composite material (polymer and ceramic) for satisfying the processing parameters is of great interest for capacitor industry. In this study, chemical…
Electrocatalysis of a Pd–Ni/composite anode (small amounts of Pd–Ni catalyst on a lanthanum chromite-based porous composite anode) for direct oxidation of dry methane in solid oxide fuel cells (SOFCs) was studied at . Synergy of Pd and Ni catalysts was observed for the direct oxidation of dry methane. Maximum power de…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis and Characterization of Block Copolymer of Polyphosphoester and Poly(ε-caprolactone)Dong-Ping Chen and Jun WangView Author Information Hefei National Laboratory for Physical Sciences at Microscale, Department of Polymer Sc…
Abstract This study examined the durability of extruded HDPE/wood‐flour composites exposed to 15 accelerated cycles of water submersion, freezing, and thawing, according to ASTM standard D6662. The durability of both maple and pine composites was assessed by testing the flexural properties and density. Mercury intrusi…
The polyol process including the introduction of preformed seeds and the inducement of poly(vinyl pyrrolidone) (PVP) has been developed as a powerful approach for synthesizing silver nanowires. Here, silver nanowires without other metal elements as impurities were synthesized through a silver seeding polyol process in…
Titanium alloys (ASTM Grades 1, 2, 7, 12, and 18) are employed as the liner and internal components of autoclaves during the high-pressure acid leaching (HPAL) of nickel laterite ores. This paper summarizes the corrosion behavior of these alloys in sulfuric acid and the effect of the addition of chlorides (NaCl). New…
A three-dimensional mathematical model is presented to describe volume changes in porous electrodes occurring during operation. Material conservation equations are used to derive governing relationships between electrode dimensions and porosity for deposition/precipitation, intercalation, and ionomer-based electrodes.…
[structure: see text] A novel catalyst has been synthesized in which a manganese-porphyrin unit is linked to two 2,2'-bipyridyl groups and two pentafluorophenyl groups in trans fashion on its four meso positions. Relative to a previous catalyst in which the manganese-porphyrin had four 2,2'-bipyridyl groups, the new c…
The photophysical properties of 4-naphthalen-1-yl-benzoic acid ligands and their Eu(III)-cored complexes were systematically investigated to elucidate the effective energy-transfer pathway in luminescent lanthanide complexes. A series of 4-naphthalen-1-yl-benzoic acid ligands, such as 4-naphthalen-1-yl-benzoic acid (N…
Electrochemical characteristics for the carbide-derived nanoporous carbon (prepared from TiC, , , , and ) in 1 M various tetraalkyl ammonium tetrafluoroborate in acetonitrile, γ-butyrolactone, and propylene carbonate electrolyte solutions has been studied using cyclic voltammetry and electrochemical impedance spectros…
We have illustrated that the dense helical arrays of CdS nanoparticles, which are aligned one-by-one and side-by-side, form on the self-assembled nanotube template from the binary components, glycolipid, N -(11- cis -octadecenoyl)-β- d -glucopyranosylamine ( 1 ) and aminophenyl-β- d -glucopyranoside ( 2 ) as an additi…