Materials Literature
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It was found that doping of tiny ferroelectric particles to a nematic liquid crystal(LC)strongly affects dielectric properties of the system. The doping increases dielectric response of the LC due to interaction between LC molecules and particles, which possess large dipole moment and high polarisability. The suspensi…
Manganocene, Cp(2)Mn, has been employed as a precursor in the synthesis of a range of Mn(II) dimers of the type [CpMn(micro-X)](2)[X = 8-NHC(9)H(6)N (1), N(Ph)(C(5)H(4)N)(2), N(4-EtC(6)H(4))(C(5)H(4)N)(3) and C[triple bond]CPh (4)] as well as the bis-adduct [Cp(2)Mn[HN=C(NMe(2))(2)](2)](5). The solid-state structures…
Mesoporous Ce0.2Zr0.8O2 nanosized powders were synthesized via a hydrothermal method in the presence of urea without any templates using a trivalent cerium salt as the starting material. The analyses by medium-angle powder X-ray diffraction (PXRD) and vis-Raman spectroscopy showed that the Ce0.2Zr0.8O2 powders were so…
The effect of Co2+ ion on the magnetic properties of the sol–gel derived cobalt ferrite thin films (400 nm thickness) was studied. Films with different solution composition ([Co2+]/[Fe3+] = 0.5–1.0) were deposited on a Si substrate from the precursor containing an aqueous solution of FeCl3·6H2O and CoCl2·6H2O. Deposit…
Copper is a generally robust material that has beneficial properties to reduce biofilm formation and pathogen colonisation of pipes supplying potable water. However, a rare pitting corrosion can occur in soft, poorly buffered waters that can lead to pipe failure. This has been shown to be mediated by a copper-tolerant…
Stress relaxation behavior of banana fiber-reinforced polyester composites were investigated with special reference to the effect of fiber loading, fiber treatment, hybridization with glass fiber and also as woven fabric composites. It was observed that incorporation of fiber in the polyester matrix reduces the rate o…
In this paper, data on the performance of thin alumina layers as hydrogen barriers are presented for coatings deposited on Pd–Ag substrate at temperatures of 600, 873 and 1000 K with a filtered arc technique. The permeation reduction factor ranged from 10 to 100 depending on the structure of the deposited layer. Recom…
In this work, the interactions at low temperature (125 °C) of gaseous NH3, NO and O2 with carbon-supported manganese oxide catalysts have been extensively studied, mainly via step–response experiments, with the objective of explaining the low-temperature mechanism of the SCR reaction on such catalysts. To achieve this…
Tritium removal is a major unsolved development task for next-step devices with carbon plasma facing components. The 2–3 order of magnitude increase in duty cycle and associated tritium accumulation rate in a next-step tokamak will place unprecedented demands on tritium removal technology. The associated technical ris…
A novel proton-conducting material based on was developed and its electrical conduction properties were investigated by measuring conductivities under 0.4-5 kPa of and 0.01-100 kPa of at 573-973 K. conducted protons dominantly by partial substitution of Sr for La. Conductivities of the 1 mol % Sr-doped were to S cm −1…
The high benzene gas selectivity of mesoporous silicate (SBA-15) was observed in the sub-nanometre micropore condensation region. The benzene/toluene ratios of the adsorbed amount were >100 and >6 in ideal and pseudo-atmospheric environments, respectively.
Diffraction gratings of medium and strong efficiency (≈10−25%) were first inscribed on thin films of p(DR1M- co -MMA) copolymer, with a 12% azo mole fraction, and p(DR1M) azobenzene homopolymer using interferences between two linearly polarized (p + p) coherent laser beams. Then, the gratings were wire-poled at T ≈ T…
Abstract Quantitative analysis of the formation energy of neutral point defects in perovskite‐type BaTiO 3 was carried out by first‐principles calculation. A 40‐atom supercell was employed and relaxation of atoms within the second‐nearest‐neighbor shell of the vacancy was taken into account. The formation energy was c…
The interfacial shear strength (IFSS) between a bamboo fiber bundle and maleic anhydride polypropylene (MAPP) was examined for various kinds of surface treatments in conjunction with ultrasonic washing. Bamboo fiber bundles were extracted from Chinese bamboo by either mechanical scratching or steam explosion. The effe…
It has been reported that hydrogen decreases the stability of the passive films on iron and stainless steel and promotes their localized corrosion. However, the mechanism of hydrogen-promoted corrosion is still not clear. Potentiostatic, electrical impedance spectroscopy measurements, and Mott-Schottky analysis were u…
Using liposomes as templates is one of the paths leading to the synthesis of silica spherical particles. In these particles, the silica wall is assembled onto the external surface of the liposome. Generally, the walls of the resulting silica spheres are porous and in the specific case of liposome templating, the exact…
By means of the combined use of scanning electron microscopy, energy dispersive spectroscopy, and atomic force microscopy in the Kelvin probe mode the mechanism of the chromate conversion coating (CCC) formation, discussed in the first part of the paper, was extended to the case of AA2024, taking into account the effe…
Palladium-catalyzed reactions such as Sonogashira coupling, Suzuki coupling, Stille coupling, Heck reactions, and Glaser-Hey oxidation were used to construct porphyrin modules of nano-scale molecular size in recent years. Recent developments in the supramolecular assembly of porphyrins and Pd (II) and in the organopal…
Novel routes to quantum dots of InP and GaP have been developed using the thermolysis of the corresponding metal diorganophosphide in hot 4-ethylpyridine, a polar, co-ordinating Lewis base. Investigations into the thermal decomposition mechanisms of M(PtBu2)3 (M = Ga, In) suggested three major processes, two of which…
Carbon nanofiber-copper composites are fabricated by composite plating techniques using a plating bath containing an effective dispersing agent for carbon nanofibers. Carbon nanofibers disperse uniformly in the copper matrix, as observed by surface and cross-sectional scanning electron microscopy. By changing electrod…