Materials Literature
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Development of synthesis methods for anisotropic metal nanoparticles is of considerable interest due to their remarkable optoelectronic properties. Various shapes ranging from rods to cubes to tetrapods and prisms may be obtained by chemical methods. Here we show that anisotropic gold nanoparticles can be synthesized…
The present work studies the incorporation of hydrogen and its bonding configuration in diamond films composed of diamond grains of varying size which were deposited by three different methods: hot filament (HF), microwave (MW), and direct current glow discharge (dc GD) chemical vapor deposition (CVD). The size of dia…
The search for low molecular weight hydrogelators (LMWH) with varying structural motif is getting intense because of its potential application in the field of biomedicines as well as the diversified area of nano-biotechnology. In this paper, we have developed hydrogels of simple cationic dipeptide amphiphiles that hav…
(E,E,E)-1,6-Diaryl(Ar)-1,3,5-hexatrienes (2, Ar = 4-fluorophenyl; 3, Ar = 2,4-difluorophenyl; 4, Ar = 2,4,6-trifluorophenyl; 5, Ar = perfluorophenyl) and (E,E,E)-1-perfluorophenyl-6-phenyl-1,3,5-hexatriene (6) were prepared. The absorption and fluorescence spectra in methylcyclohexane solution showed only a small depe…
Ammonia borane (AB) is of great interest for storing hydrogen, an important issue in the growing field of hydrogen technology. The reaction pathways leading to the thermal decomposition of solid-state AB incorporated in carbon cryogels (CC) have been studied by spectroscopic methods. The time-dependent thermal decompo…
The inclusion populations and the relevant inspection methods are described with a particular emphasis on the SEM-FEG/EDS image analysis system. Then, the efficiency and the limits of the inspection methods are assessed by a new simulation approach.
The corrosion behavior of structural materials in liquid lead alloys like Pb-17Li as a liquid tritium breeder for future fusion reactors and Pb-55Bi (lead-bismuth eutectic [LBE]) as an envisaged spallation target and/or coolant for accelerator-driven systems (ADS) and lead-cooled Gen IV reactors is a key issue in the…
Abstract Single stage hot deformation (SSHD) process is an effective method to fabricate anisotropic magnet. In this study, the influences of particle size and hot press temperature on microstructure were discussed, respectively. Anisotropic magnetic properties are affected by SSHD process conditions through the chang…
This paper has scrutinized, both experimentally and theoretically, the conformation of an olefinic substituent on the pyrrole β-carbon of tetraphenylporphyrin. Compelling evidences collected from linear optical absorption and NOESY 1 H NMR experiment strongly suggest that, in solution, it is highly possible for the ol…
When snow is unevenly distributed on horizontal insulators there is a higher risk for flashover. This was investigated for a 400 kV circuit breaker with horizontal breaking chamber insulators. The highest risk occurs when connecting a line to a generator. For a short moment during the synchronization the voltage can r…
An anhydrite (CaSO 4 )‐rich soil developed over a 70‐cm‐deep water table is mapped in the coastal sabkha (salt flat) of Abu Dhabi Emirate. An anhydrite soil type is unique in occurrence in a wet zone over a water table, although anhydrite in this setting has been reported before. The X‐ray diffraction analysis clearly…
Abstract Iron cations in the octahedral sheet are a disadvantage to the industrial application of palygorskite clays. In this study, a palygorskite sample from eastern China (Mayaoshan deposit, Jiangsu Province) is shown to have an Fe content that is much greater than usual. The structural formula of the Fe-rich palyg…
Excitation of a magnetodielectric plate with the parameters ɛ → −1 and μ → −1 by an elementary electric dipole is considered. The behavior of the wave field is investigated in the case when the values of the constitutive parameters approach the singular point ɛ = μ = −1 along the curve ɛμ = 1. A condition is establish…
Abstract Some poly(alkylene dicarboxylate)s, derived from ethanediol or 1,4- butanediol and different diacids, have been synthesized and analyzed by DSC to determine the correlations existing between the thermal properties and the length of the aliphatic chain. The polymers show crystallization and melting temperature…
Density functional theory (DFT) calculations were performed to calculate the electric field gradient (EFG) tensors at the sites of aliminium ( 27 Al) and nitrogen ( 14 N) nuclei in an 1 nm of length (6,0) single-walled aliminium nitride nanotube (AlNNT) in three forms of the tubes, i. e. hydrogencapped, aliminium-term…
Abstract A TTF derivative with an imidazole-annelation having hydrogen-bond and proton-donor/acceptor abilities was newly synthesized. The donor formed a two-dimensional structure by hydrogen-bonds and π stacks in the crystal. The imidazole-annelation increased the electron-donating ability of the donor.
The NH acid properties of nonplanar dodecasubstituted porphyrins (H 2 P) were studied by the spectropotentiometric and spectrophotometric methods and by semiempirical quantum-chemical calculations. The reaction of H 2 P with a weak organic base DMSO proceeded with the formation of the H-associated form DMSO⋯H⋯PH or DM…
The effect of calcium glutarate (Cagt) and calcium pimelate (Capt) on the formation of β crystalline form in isotactic poly(propylene) in the crystallization temperature range of 110–130°C has been investigated. The content of β phase crystals increase with the addition of calcium glutarate. K (relative content of β c…
(2007). IMPROVED SYNTHESIS OF 2-CHLORO- AND 2, 9-DICHLORO-1, 10-PHENANTHROLINES. Organic Preparations and Procedures International: Vol. 39, No. 6, pp. 603-608.
The review summarizes the results of research on general regularities of synthesis of granulated carbon-carbon materials on the basis of nanodispersed carbon and low-temperature pyrocarbon and of works on application of these materials.