Materials Literature
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We have constructed the phase diagrams for a binary-mixture system of antiferroelectric and ferroelectric liquid-crystalline materials in both thick and thin cells. In the phase diagrams the boundary between the smectic- C and smectic- C{A} phases runs almost parallel to the temperature axis below from ca. 70 degrees…
The diffusion of indium in single-crystal ZnO was studied by an ion implantation technique (accelerating voltage of 170 keV and dose of 1 × 10 16 cm -2 ) in the temperature range between 750 and 850 °C. The indium profiles have a characteristic tail with a constant concentration region due to the Fermi-level effect on…
The diagnosis algorithm using ultra high frequency (UHF) method with the higher-order electromagnetic wave (EM-wave) was examined as the advanced partial discharge (PD) diagnosis method in a gas insulated switchgear (GIS) in the former paper. Previous studies evaluated the characteristics of EM-waves propagated in a s…
To lower the lightning impulse withstand voltage of gas insulated switchgear (GIS) while maintaining the high reliability of its insulation performance, it is important to define in an organized way the insulation characteristics for non-standard lightning impulse voltage waveforms that represent actual surge waveform…
A novel structure for a composite right/left-handed (CRLH) corrugated waveguide that operates in the millimeter-wave band is proposed. The CRLH waveguide is comprised of a rectangular waveguide which has tilted corrugations on its bottom broad wall. By operating both above and below the cutoff frequency of the dominan…
Metallic silver particles in the nanometer size range were obtained in SiO2 matrix by the reduction of AgNO3 with the non-ionic diblock copolymer (Brij 58). Hexagonal mesostructured sol-gel films were synthesized by dip-coating method using the surfactant Brij58 to produce channels into the film, which house the silve…
Gold nanoparticles (AuNPs) reveal fascinating electronic and optical properties, when they organize into one-dimensional architectures. Here, we developed a simple approach to immobilize the AuNPs in a well-aligned one-dimensional arrangement on a silicon surface. A conformationally ordered hexadecyl (HD) monolayer at…
We review recent results concerning the spectrum of edge states in the quantum Hall effect in graphene. In particular, special attention is paid to the derivation of the conditions under which gapless edge states exist in the spectrum of graphene with “zigzag” and “armchair” edges. It is found that in the case of a ha…
A few nanoparticle dispersions have been produced for centuries, but it is mainly during the past decade that they have been extensively developed for an amazing range of end uses, some in textile dyeing and finishing but more particularly in a technology now referred to as photonics. The developments in this field ar…
Components made from cast nickel aluminum bronze have been used extensively in some seawater systems because of their generally good toughness. However, this alloy can be susceptible to selective phase corrosion. This has led to requirements for removal of components on a fixed timetable to test for the presence of th…
We have successfully intercalated gadolinium (III) diethylenetriamine pentaacetic acid (Gd-DTPA) into layered double hydroxide (LDH). X-ray diffractometry, Infrared spectroscopy, and electron microscopic studies together with T1-weighed contrast image analyses revealed the possiblity of Gd-DTPA/LDH as in vivo magnetic…
A highly ordered nanoporous aluminosilicate (MMZ(USY)) was synthesized using commercially available zeolite USY as the framework source and cetyltrimethylammonium bromide as the template. The aluminosilicate was characterized by XRD, N2 adsorption, ICP-AES and TPD. The catalytic performance of the MMZ(USY) material in…
Abstract Multinary hydrides based on mixtures of s - and p -block metals are often not fully hydrogenated, but possess a polymeric anion which is formed by the p -block component upon reduction by the s -block metals. Hydrogen may occur hydridic and exclusively coordinated by s -block metal ions (Zintl phase hydrides)…
Four tetra-α-substituted phthalocyanines, represented as [( OR ) 4 Pc ] M where OR is 2,2,4-tri-methyl-3-pentoxy and M = Co (II), Ni (II), Cu (II) or Zn (II), were investigated as to their electrochemistry, UV-visible and ESR spectroscopy. The electron-donating groups on the four α-positions of the phthalocyanine macr…
Electrical and magnetotransport properties of single walled carbon nanotube (SWCNT) fibers are reported. The dependencies of resistance on temperature can be approximated by the Mott law for three-dimensional variable range hopping (VRH) below 80 K and by typical law for fluctuation induced tunneling model within the…
Abstract The properties that might influence the sequestration of aflatoxin B 1 (AfB 1 ) were examined. Laser-diffraction, particle-size analysis (LDPSA) indicated that the particle size of the smectite influences the amount of AfB 1 adsorbed. Effective adsorbent smectites disperse well under combined sodium hexametap…
In the quest for better fuel economy and improved environmental performance, magnesium may well become a metal of choice for constructing lighter, more efficient vehicles. Magnesium is the lightest structural metal, yet it has a high strength-to-weight ratio makes it comparable to steel in many applications. The world…
Arrays of polypyrrole nanorods were fabricated using an anodized aluminum oxide (AAO) template for use as supercapacitors. Gold was deposited on one side of the AAO template by thermoevaporation for use as an electrode and pyrrole was electrochemically polymerized, causing it to grow from the gold electrode into the A…
A multilayered foamed nanocomposite with graded concentration of carbon nanotubes is proposed as a novel microwave absorber. The dispersion and foaming process enables to control the gradation in conductivity of each layer. Absorption performances are demonstrated through measurements of reflectivity and shielding eff…
Particulate materials loaded under uniaxial compression and tension are studied using the discrete element method. Self-healing of the damaged samples is activated through sintering, a process that effectively increases the contact adhesion (i.e. the tensile strength) between particles. The initial sample is prepared…