Materials Literature
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Vanadium silicalite-1 (VS-1) nanoparticles dispersed onto the mesoporous walls of SBA-15 silica have characteristics different from those of the full-grown VS-1. In particular, the vanadium-binding site differs extensively. Here, we monitor the local environment of VO 2+ with different electron paramagnetic resonance…
Abstract The adsorption possibilities of oxygen atoms at Al (111) surface for different oxygen atom coverages (Θ) from 0.25 to 1 ml have been studied using first principles based on density functional theory with generalized gradient approximation. The results show that the interstitial sites on Al (111) surface are r…
In this work, we present the results of the study on the interactions between gold nanorods (GNRs) and glucose. The optical properties of GNRs have higher sensitivity to glucose compared with that of gold nanospheres. The long-wavelength bands of the GNRs obviously decrease as the concentration of glucose increases. A…
Small amounts of impurities can strongly impact the electrode kinetics of electrochemical cells and devices, leading to an improved or declined performance. This study shows that one material, silica, can influence the electrochemical behavior of the basic solid-state electrode system Pt(O 2 )/YSZ (yttria-stabilized z…
Abstract Poly(ethylene glycol) (PEG) has been widely used in biomedical applications because of its protein‐resistant and nontoxic properties. In this study, a plasma‐polymerized ethylene glycol (PPEG) thin film was deposited on a substrate using a capacitively coupled plasma chemical vapour deposition (CCP‐CVD) metho…
The crystal structures of GeSb(6)Te(10) and GeBi(6)Te(10) were scrutinized using an X-ray powder diffraction method, which revealed that these compounds crystallize in trigonally distorted cubic close-packed structures with a 51-layer period (R3m). Each layer consists of a triangular atomic net; Te atoms occupy their…
With the use of stable isotopes, this study aimed to compare the bioavailability of active absorbable algal calcium (AAACa), obtained from oyster shell powder heated to a high temperature, with an additional heated seaweed component (Heated Algal Ingredient, HAI), with that of calcium carbonate. In 10 postmenopausal w…
In ${\text{YMn}}_{2}{\text{O}}_{5}$, the Mn atoms occupy two nonequivalent Wyckoff sites within the unit cell exhibiting different oxygen coordinations, i.e., the system can be characterized as a mixed-valence compound. For the formation of the orthorhombic crystal structure, Jahn-Teller distortions are assumed to pla…
Medical polyurethanes have shown good bio-stability and mechanical properties and have been used as coating for implantable medical devices. However, despite their excellent properties, they are relatively permeable to liquid water and water vapour which is a drawback for electronic implant encapsulation. In this stud…
The solubility of sodium naproxen in methanol−water and ethanol−water solutions was determined as functions of temperature and solvent composition over a temperature range of 10−40 °C and the entire range of alcohol water compositions. Data were correlated using an expression in the form of the van’t Hoff equation, wh…
The dependences of phonons on the spin structures of BaFe2As2 were studied using first-principles supercell approach. We considered the nonmagnetic, checkerboard, stripe, and spin-density-wave structures as well as a spin structure labeled as STR17. We find that STR17 is lower in energy than the stripe. It is seen the…
Abstract This paper presents a methodology to calculate the value of Carter's factor for airgaps with polygonal slots. A numerical evaluation of the Schwarz–Christoffel transformation is performed using Genetic Algorithms. The methodology presented here extends Carter's method to airgaps with more complicated geometry…
Abstract The effect of tungsten species on the incorporation and migration of phosphorus species within anodic alumina is investigated. The study employs barrier anodic films, formed on a sputtering‐deposited Al‐15at.%W alloy in phosphate electrolytes. The films consist of either an outer tungsten‐containing region an…
Abstract Three novel copper–radical complexes [Cu(PhCOO) 2 (NITpPy) 2 (H 2 O) 2 ] ( 1 ), [Cu 2 (Me 3 CCOO) 4 (NITpPy) 2 ] ( 2 ), and [{Cu 2 (Me 3 CCOO) 4 (NITpPy)} n ] ( 3 ) [NITpPy = 4,4,5,5‐tetramethyl‐2‐(4‐pyridyl)‐2‐imidazoline‐1‐oxyl 3‐oxide] were synthesized and characterized structurally as well as magnetically…
Many methods have been reported in the literature to improve signals and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. In this work, we propose a new pathway to prepare SERS-active substrates with Au/TiO 2 nanocomposites (NCs) by electrochemical methods to achieve these goals…
We apply broadband measurement techniques to determine the dielectric permittivity of Bi1.5Zn1.0Nb1.5O7 (BZN) thin films over the frequency range 1 kHz to 40 GHz. At room temperature, the permittivity function shows relaxation at high frequencies (∼1 GHz), and as the temperature is reduced, the onset of relaxation rap…
We show that the Raman spectrum of graphene is sensitive to the surface chemistry of the substrate where the atomic plane is deposited. Two types of functionalized SiO2 surface are experimentally compared: OH-terminated and NH2-terminated. In the case of NH2-terminated surface, the graphene Raman bands are significant…
Carbon nanotubes (CNTs) are novel materials with remarkable properties; possible beneficial applications include aircraft frames, hydrogen storage, environmental sensors, electrical transmission, and many more. At the same time, precise characterization of their potential toxicity remains elusive, in part because engi…
We successfully carried out 30-micron observations from the ground-based telescope for the first time with our newly developed mid-infrared instrument, MAX38, which is mounted on the University of Tokyo Atacama 1.0-m telescope (miniTAO telescope). Thanks to the high altitude of the miniTAO (5,640m) and dry weather con…
We demonstrate a novel defect-induced bending mechanism for a modified oblique-angle deposition (OAD) system, where different defect density was introduced to accommodate the mass difference between the shadowed and exposed surfaces, leading to continuous structural bending. Oblique angle sputtering and hydrothermal p…