Materials Literature
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A proton-conductive solid oxide fuel cell (H-SOFC) has the advantage of operating at higher temperatures than a PEM fuel cell, but at lower temperatures than a SOFC. This study proposes a mathematical model for an H-SOFC in order to simulate the performance and optimize the flow channel designs. The model analyzes the…
Abstract The purity of a structure made with electron beam induced deposition (EBID) is a the major concern when creating micro and nano-scale functionalities, for example for rapid prototyping. Substantial research focuses on the improvements of the purity using chemical vapor deposition (CVD) based precursors. Howev…
A novel hybrid nanostructure, that is a Ag nanoparticle decorated LaF(3):Yb(3+)/Ln(3+)@SiO(2) nanosphere (Ln=Er, Tm), was constructed by a facile strategy, and characterized by XRD, TEM, FTIR, XPS and UV-vis-NIR absorption. Obvious spectral broadening and red-shift on the surface plasmon resonance were obtained by adj…
Molecular encapsulation of anionic porphyrins in NH2-terminated polyamidoamine (PAMAM) dendrimers and the interfacial behavior of the dendrimer-porphyrin associates were studied at the polarized water|1,2-dichloroethane (DCE) interface. Formation of the ion associates was significantly dependent on the pH condition an…
Electron diffraction is a complementary technique to single-crystal X-ray diffraction and powder X-ray diffraction for structure solution of unknown crystals. Crystals too small to be studied by single-crystal X-ray diffraction or too complex to be solved by powder X-ray diffraction can be studied by electron diffract…
Blue‐emitting phosphor of Ce 3+ ‐activated fluorosilicate apatite Ba 2 Y 3 [ SiO 4 ] 3 F was prepared via conventional solid‐state reaction method. The X‐ray powder diffraction ( XRD ), scanning electron microscopy ( SEM ), photoluminescence ( PL ) excitation and emission spectra, and the decay curves (lifetimes) were…
Abstract Single crystals of thorium dioxide ThO 2 , grown by the hydrothermal growth technique, have been investigated by ultraviolet photoemission spectroscopy (UPS), inverse photoemission spectroscopy (IPES), and L 3 , M 3 , M 4 , and M 5 X‐ray absorption near edge spectroscopy (XANES). The experimental band gap for…
Exciting helical mesoporous organosilicas including supplementary chirally doped moieties into their spiral walls were one-pot successfully synthesized with good structural order for, to the best of our knowledge, the first time. This one-step direct synthesis of helical chirally doped periodic mesoporous organosilica…
ABSTRACT The flocculation of silica during vulcanization is monitored using the ultra small-angle X-ray scattering technique for two different types of silica: a highly dispersible silica (HD) and a conventional silica (CV), mixed into a blend of S-SBR and BR rubbers. The cutoff length of the silica aggregate R ss and…
In this paper, on the basis of gradient elasticity theory with one gradient parameter, wave propagation in rectangular nanoplates is studied. In the governing equation, the influences of initial stresses and elastic foundation are also considered. An analytical approach is used to solve the governing equation. The eff…
Abstract Polyhedral oligomeric silsesquioxane ( POSS ) compounds consist of unique three‐dimensional nanocages with a general composition of ( RSiO 1 .5 ) n , where R groups are organic moieties for enhanced physical and chemical compatibility of inorganic POSS frameworks with organic systems. Due to their unique size…
A variety of consumer products containing silver nanoparticles (Ag NPs) are currently marketed. However, their safety for humans and for the environment has not yet been established and no standard method to assess their toxicity is currently available. The objective of this work was to develop an effective method to…
Plasma polymer thin films are useful in a variety of different fields. In this article, the fragmentation of ethanol during plasma polymerization at different discharge powers (2–32 W) is described. The positive ion mass spectrometry data of the plasma phase demonstrated formation of oligomeric species of the type [M+…
Thermal cyclic loading influences the life cycle of the thermoelectric device pins because of the thermal stress developed in the pins. Although thermal efficiency improves for different geometric configurations of the device pins, development of thermal stresses limit the selection of pin geometry in practical applic…
BACKGROUND: There is a need for medical treatments to curb the rising rate of obesity. Weight reduction is correlated with a decrease in associated risk factors and cholesterol levels in humans. Amorphous silica particles have been found to exert a hypocholesterolemic effect in humans, making them popular dietary addi…
ABSTRACT The surface modification of existing polymeric biomaterials represents a key strategy for improving the hemocompatibility in long‐ and short‐term biomedical materials without altering their bulk properties. Several techniques have been widely explored to generate surfaces that can prevent the activation of th…
The self-propagating high-temperature synthesis (SHS) of (1 – x )HfB 2 – x HfSi 2 ( x from 0 to 1) ceramics is successfully performed in this work starting from elemental reactants. The presence of HfSi 2 in the composite system progressively reduces the exothermic character of the synthesis reaction. Bulk ceramics ar…
Strong near-infrared (NIR) localized surface plasmon resonances (LSPRs) have been observed in spherical Cu1.94S nanocrystals and matchstick-like Cu1.94S-ZnS heterostructured nanocrystals, which have been synthesized using a simple one-pot approach without any injection and pre-synthesis of metal precursors. The LSPRs…
ABSTRACT The hydrolysis of acetic anhydride in the presence of water is an exothermic reaction that produces acetic acid. Most of the research has focused on low ratios of acetic anhydride to water. The major concern in the industry is the accidental addition of a small amount of water to large quantities of acetic an…
The oxidation of NiAl(100) surfaces by water vapor is studied using X-ray photoelectron spectroscopy (XPS) to elucidate the effect of temperature and vapor pressure on the surface passivation mechanism of the NiAl alloy. The water-vapor oxidation at ambient temperature (25 °C) results in self-limiting Al(OH)3/Al2O3 bi…