Materials Literature
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Cross-linking, leading to an insulating quasi-polymeric material, occurs with the initial irradiation-induced modification in films of the monomolecular insulator (1,1′;4′,1″-terphenyl)-4,4″-dimethanethiol, although this is accompanied by a decrease in the gap between the highest occupied molecular orbital and lowest…
Crystal structure of a layered perovskite, KCa2Nb3O10, was determined by the Rietveld refinement method for a powder neutron diffraction pattern. The compound crystallizes a monoclinic system with a space group P21/m (No. 11) and lattice parameters of a=0.77418(6) nm, b=0.77073(6) nm, c=1.4859(1) nm, β=97.51(1)°.
Perovskite-type LaSrMO4 (M = Mn, Fe, Co, Ni, Cu) mixed oxides were prepared by the decomposition of amorphous citric and ethylenediaminetetraacetic acid complexes and investigated by the XRD, FTIR, BET, TPR, TPD and XPSmethods. Their catalytic behavior in the total oxidation of hexane was examined. The following activ…
Lead-free piezoelectric ceramics (1-x)(Bi0.5Na0.5)TiO3-xBa(Zr0.04Ti0.96)O3 (abbreviated as BNT-BZT100x, with x ranged from 2 to 10 mol%) have been investigated. The samples were prepared by a conventional sintering technique. Effect of amount of BZT on the electrical properties and microstructures of BNT-BZT lead-free…
A series of computational chemistry projects is described that focuses on the isomerization reactions, HNC–HCN and CH 3 NC–CH 3 CN. These projects guide students through several applications involving transition state location and optimization, intrinsic reaction coordinate potential energy surface construction, and t…
Mg-based Laves phase alloys (Mg0.7M0.3)Ni2, where M elements were Ca, La, Ce, Pr, Nd and Gd were successfully developed. The alloys can be synthesized by a conventional induction melting and annealing method from intermetallic compounds MgNi2 and MNi2 as a source of Mg, Ni and M elements. The crystal structures of the…
Active cobalt alloy cathodes for hydrogen evolution in 8 kmol·m−3 NaOH at 90°C was tailored by electrodeposition. Enhancement of cathodic activity of Co-Ni alloys was carried out by the formation of Co-Ni-Fe-C alloys. The addition of both iron and carbon was effective in enhancing the electrolytic hydrogen evolution a…
Practical applications of thermoelectric modules have been most common in Peltier cooling and heating in various systems at around room temperature. Recently, recovery of electricity from heat wasted in various situations has been expected for effective utilization of energy resources. One of the key technologies for…
The Lyocell process (system: cellulose-water-N-methylmorpholine oxide) of Zimmer AG offers special advantages for the production of cellulose fibers. The process excels by dissolving the most diverse cellulose types as these are optimally adjusted to the process by applying different pretreatment methods. Based on thi…
This paper gives an overview of some potential uses of carbon nanotube field effect transistors (CNTFETs) in logic circuit design. The realization of existing logic functions with resistive-load and complementary logic is described, with some examples of how a logic function can be coded by selective doping of a singl…
Nearly monodispersed-size CuxS nanocrystals(NCs) were obtained by sulfuration of Cu(II)-alkyl-amine complexes using dodecanethiol-solvated sulfur at 363 K. The morphology and chemical composition of CuxS NCs can be controlled by using appropriate alkyl-amine ligands. NCs of Cu-deficient sulfides, Cu1.8S (digenite) or…
A homologous series of eleven five-ring symmetrical bent-core compounds containing terminal -alkyl carboxylate groups were synthesized, characterized and their dielectric and electro-optical properties have been investigated. The lower homologues ( = 6-11) of the series show B structures with an interesting odd-even e…
Duplex coatings combine an "active" protection provided by a metal deposit, playing the role of sacrificial anode to cathodically protect the substrate with "passive" protection of an organic layer, playing the role of a diffusional barrier to hinder transport of ionic species. The corrosion behavior of these duplex c…
A tellurium-S-phenylene-O-strontium-O-phenylene-S hybrid copolymer was calcined under an argon atmosphere at 400-600°C. The material calcined at 500°C was found to be composed of nano-sized SrS and Te particles in the matrix of carbon clusters. ESR spectral examinations revealed that the calcined material has a photor…
This paper discusses potential applications of nanotechnology in drug delivery systems and pharmacotherapeutics. There are a few limitations in the use of conventionally available drug delivery systems as pharmacological agents in disease treatment. Lack of target specificity, altered effects and diminished potency du…
The dielectric properties vary significantly with the B-site cations in ABO3 perovskite-type oxides. In this study, we tried to understand the difference in the dielectric properties between SrTiO3 (STO, εr=290, Qf=3000 GHz) and SrZrO3 (SZO, εr=30, Qf=13700 GHz) by measuring the dielectric spectroscopy of their solid…
TiC-TiB2-SiC composites were synthesized by arc-melting using TiC, TiB2 and SiC powders as starting materials in Ar atmosphere. TiC-TiB2-SiC system was a ternary eutectic, whose eutectic composition was 34TiC-22TiB2-44SiC (mol%). The TiC-TiB2-SiC eutectic composite showed a lamellar texture, where lamellar SiC grains…
We report here the first experimental results on the laser Raman spectroscopic, powder X-ray diffraction (XRD) and X-ray photoemission spectroscopic and high-temperature differential thermal analysis studies on graphite from the Burugubanda-Tapasikonda shear zone in the Proterozoic Eastern Ghats Mobile Belt (EGB) of A…
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有机性地作为中间的、中国冷杉木(Cunninghamia lanceolata ) 作为 organophilic 与 montmorillonite (MMT ) 修改了 MMT (OMMT ) 和水溶性的酚甲醛树脂(PF ) wood/MMT nanocomposites (WMNC ) 经由加重的 nano 置闰被准备并且由 XRD， SEM 和 FTIR 描绘了。结果显示出那：1 ) OMMT 的准备是很成功的；2 ) 白手起家的 PF 能有效地设置进 MMT markably 增加它的画廊距离甚至剥落它的 nano 硅酸盐薄片；3 ) XRD 分析显示一些 exfoliated MMT 在 WMNC 减少在木头房间墙和木…