Materials Literature
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We report on the use of glassy carbon electrodes modified with 9,10-phenanthraquinone or 1,2-naphthoquinone for their applicability as catalytic materials for oxygen reduction and hydrogen peroxide producers. The stability of these modified electrodes are investigated and found to be suitable for use under ultrasound,…
Different treatment processes such as alkaline washing, bleaching, and slack-mercer ization are used to improve the sorption characteristics of cellulose fibers. The differences between the sorption properties of cellulose fibers are measured with tensiometry, and their sorption velocities are measured with liquids of…
A Fe-Ce-ZSM-5 catalyst elaborated from a new synthesis route exhibits very high NO conversion (75-100%) in the selective catalytic reduction of NO by NH(3) in a wide temperature window (523-823 K), even in the presence of H(2)O and SO(2).
Density functional theory (DFT) calculations and Monte Carlo (MC) simulations are used to calculate the exchange interactions in the Fe(III) cluster [Fe14(bta)6O6(OMe)18Cl6], impossible to determine by conventional methods--the results support a huge ground state spin arising from competing antiferromagnetic interacti…
Abstract A cobalt(II)‐chitosan coordination polymer has been prepared by soaking a chitosan film in CoCl 2 aqueous solution. The results have been investigated by means of X‐ray photoelectron spectroscopy (XPS), Fourier Transform infrared FT‐IR spectroscopy, thermal analysis and electrical conductivity measurements. T…
The in situ synthesis of micrometer and nanometer gold particles in polyaniline (PANI/Au composite) using chemical or electrochemical methods, has been compared. The direct chemical synthesis of PANI/Au is initiated via the spontaneous oxidation of aniline by AuCl 4 − . Gold colloid formation and subsequent reaction w…
The lanthanum strontium cobalt ferrites (LSCF) are a well-known family of mixed oxygen-ionic/electronic conductors that are of interest for use in high-temperature electrochemical devices, such as solid oxide fuel cells and oxygen separation membranes. One of the challenges however in developing these types of devices…
Abstract Research on dendrimers continues to expand as further advances in synthetic methodology and characterization techniques translate to additional applications. Recently, dendritic polymers composed of the natural metabolites glycerol and succinic acid were synthesized, functionalized, and evaluated as new medic…
We synthesized a series of achiral non-symmetric banana-shaped compounds. Some of them were found to exhibit a nematic phase. We are strongly interested in this nematic phase composed of the bent molecule. On the basis of the assumption that the dynamics of the nematic phase of the banana-shaped molecules could be muc…
New homologous achiral five-ring bent-core mesogens with a lateral fluorine substituent at the central core and chlorine substituents at the terminal rings have been synthesized. Two mesophases could be distinguished by polarizing microscopy, calorimetry, X-ray, and electro-optical investigations. The high-temperature…
The initial stages of blistering in W due to low-energy He implantation have been investigated by molecular dynamics simulations. The calculations were carried out on a block of (001) W at 0 K, for 100 eV He ions impinging on it. This energy is far below the threshold energy needed by the projectiles to create lattice…
3,4-Phenylenedioxythiophene (PheDOT), a benzenic analogue of 3,4-ethylenedioxythiophene (EDOT), has been synthesized using two different routes namely etherification of 2,5-dicarboethoxy-3,4-dihydroxythiophene with halo-aromatics and transetherification of 3,4-dimethoxythiophene with catechols. Quantum calculations an…
Design of a Reduction-Resistant Ce0.8Sm0.2 O 1.9 Electrolyte Through Growth of a Thin BaCe1 − x Sm x O 3 − α Layer over Electrolyte Surface , Hirabayashi, Daisuke, Tomita, Atsuko, Hibino, Takashi, Nagao, Masahiro, Sano, Mitsuru
Redox gradients have been used to tailor the arrangement of photoactive ITO-electrodes at the molecular level.
We have developed electrochemical porosimetry (ECP) for analyzing microstructures of porous electrodes in situ , which can give most meaningful geometric information in electrochemical systems. The methodology is based on a model that relates electrochemical impedance data with microstructural information. Pore length…
We hereby report a simple route for the low temperature synthesis of mesoporous nanocrystalline titania involving brief hydrothermal treatment of butanolic precursors and non-ionic tri-block-copolymer surfactant at 100 degrees C, followed by evaporation induced self assembly to make a crack-free flexible film. At no t…
New banana shaped liquid crystals with a carbosilane unit at one end were synthesised and depending on the number of Si-atoms either antiferroelectric (AF) or ferroelectric (FE) switching polar smectic C phases have been obtained.
In this study, yttrium-stabilized zirconia (YSZ) thin films 1-2 μm thick electrolyte have been prepared using NiO-YSZ anode as substrates. Fuel cell test was conducted with the single chamber configuration in methane-air gas mixture using (LSCF) as the cathode. Test results showed that the open-circuit voltage to be >…
Chemical reactions and stability of Ti3SiC2 in Cu during processing of Cu/Ti3SiC2 composites in the temperature range of 900-1070 degreesC were investigated using X-ray diffraction and scanning electron microscopy. The results indicated that Cu reacted with Ti3SiC2 above 900 degreesC, and the reaction products were cl…
Nanotechnology is set to change the world. Nanotechnology is increasingly talked about with the same breathless excitement that surrounded biotechnology and information technology at the start of the 1990s. Nanotechnology has caught the attention of several nongovernmental organizations (NGOs) that have spent the past…