Materials Literature
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The photochromic gel thin films on the glass substrate were prepared by doping photochromic dye, spironaphthooxazine, into the phenyltriethoxysilane (PhiTEOS), vinyltriethoxysilane (VTEOS), methyltriethoxysilane (MTEOS), and tetraethylorthosilicate (TEOS) gels. The λ max of the spironaphthooxazine doped into the gels…
The preparation and structural characterization of a novel, solid Brønsted acid based on Dawson alpha2-monotitanium(IV)-substituted polyoxometalates (POMs) are described. The free-acid form of the POM, i.e., 13H+-heteropolyacid with the formula H13[1b].55H2O DH-1 (1b = [(alpha2-P2W17TiO61)(alpha2-P2W17TiO61H)(mu-O)]13…
The activated adsorption of ethylene on atomic-oxygen-covered Ag(100) surface and on an open-type step edge thereon was studied using density-functional-theory. On perfect Ag(100), such adsorption results in the formation of an oxametallacycle (OMC), with an activation energy slightly larger than 0.3 eV. We find that…
We proposed the stabilization of cholesteric blue phases (BPs) by confining liquid crystal (LC) molecules within a small area. The temperature range of the BP was expanded in the LC confined in the polymer network (PN). In particular, the temperature range of BP I in the LC/PN composite is six times wider than that of…
Densification of boron carbide (B4C) was studied by pressureless sintering at temperatures ranging from 2108° to 2226°C with Al gas and Si compound gas derived from SiC. High purity boron carbide compacts attained a bulk density of a nearly full density (2.455 g/cm3) after being sintered at 2226°C.
A new furostan-type saponin (1) was isolated from the methanolic extract of Brunfelsia grandiflora leaves, together with four known compounds. The chemical structure of 1 was determined by spectroscopic analysis and chemical reaction to be 26-O-beta-D-glucopyranosyl 22alpha-methoxyfurost-3beta,26-diol 3-O-beta-D-xylop…
“Shittori” in Japanese word of the human tactile sensation was not the same as smoothness. We evaluated the “shittori” feeling for fabrics by the sensory evaluation such as Kendall’s rank method, Scheffe’s method of paired comparison (modified method by Nakaya), and analyzed the relationship between the results by sen…
The protonation equilibria of tetrakis(4-sulfonatophenyl)porphyrin sodium salt, Na 4 [H 2 tpps], and its complex formation with Zn 2+ ion in aqueous solutions were studied over a wide range of pH values, (2 to 12), using a combination of spectrophotometric and potentiometric methods at constant temperature, 25 °C, and…
Structural capacitors, supercapacitors, and batteries are fabricated and tested, using modified materials and processes based on conventional fiber-reinforced polymer matrix composites. Printed circuit board prepregs are used to create structural capacitors that demonstrate good dielectric energy density and mechanica…
We prepared crystalline Ag nanocluster-incorporated electrodes using a radio frequency magnetron cosputtering system for use in thin-film micropseudocapacitors and investigated their structural and electrochemical properties. High-resolution electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy…
A new broadband wide-view circular polarizer is proposed for high transmittance multi-domain vertical-alignment liquid crystal displays (MVA LCDs). This configuration only requires one biaxial plate in the conventional circular polarizer. The optimal film parameters are obtained analytically through spherical trigonom…
A comparative study of oxidative decomposition behavior of a wide range of vegetable oils and its correlation to iodine value (IV) using thermogravimetric analysis (TGA) was described. The oxidative decomposition of saturated fatty acids shows weight loss before 385 degrees C while oxidative decomposition of unsaturat…
Negative refraction has been the subject of considerable interest and it may provide the possibility of a variety of novel applications. It arises in metamaterials that have simultaneous negative permittivity and permeability , where in-homogeneities are much smaller than the wavelength of the incoming radiation. Rece…
The possibility to prepare porous materials with controlled composition and porous structure using environmentally benign, readily available and cheap templates such as egg-derived scaffolds was explored. Different parts of the egg were used for the preparation of: (i) porous disks and beads of SiO2 and SiO2–Al2O3; (i…
Carbon nanosheets have recently evolved into useful edge emitters with high emission current densities, low threshold electric fields, and long lifetimes. In addition to further improvement in these characteristics, good stability and repeatability are also essential for these materials to be suitable for high vacuum…
The dynamic Young's modulus of elasticity and the dynamic piezomagnetic coefficient of magnetostrictive material are derived based on the nonlinear constitutive model of magnetostrictive material. Based on the equivalent circuit method, the relation between magnetoelectric effect of the laminated composite and the dyn…
Abrasion is the mechanical deterioration of fabric components by rubbing them against another surface. Abrasion ultimately results in the loss of performance characteristics, such as strength, but it also affects the appearance of a fabric [1]. Many parts of apparel, such as collar, cuffs and pockets, are subjected to…
The present paper discusses the feasibility of frequency analysis of X -ray reflectivity data, which have been used extensively to obtain information on density, layer thickness, surface and interface roughness for layered materials. So far, the experimentally obtained data have been analyzed by least squares fitting…
In the test of resisting seawater erosion,the durability of plain seawater concrete was studied considering the influence of seawater chemical composition on cementing ability,cement and sand.Furthermore,a long-term strength observation was carried out in its project application.We can substitute seawater concree with…
Size of nanoparticles can be predicted using a simple Scherrer relation, based on the width of X-ray diffraction (XRD) patterns of materials. In present paper we derive the Scherrer relation using a “multi slits interference” approach studied in basic physics course. We found the dependence of crystallites size on the…