Materials Literature
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Reaction of the metastable anion [H(2)P(2)W(12)O(48)](12-) with Co(2+) yields a novel heart-like polyoxoanion based on the lacunary Preyssler-type anion [P(4)W(24)O(92)](20-).
More than 50 crystals containing 7,7,8,8-tetracyanoquinodimethane (TCNQ) in various guises are classified into a limited number of structural types and the possible assignment of charge states by diffraction and spectroscopic methods is compared. In the crystalline state the 7,7,8,8-tetracyanoquinodimethane (TCNQ) moi…
H diffusion constants have been determined from steady-state fluxes through Pd-Ag alloy membranes. The upstream side is maintained at a nearly constant pup (and consequently at a nearly constant rup=H/(Pd(1-x)Agx)) atom ratio, whereas the downstream side is at pH2 approximately 0 (rdown=0) (423-523 K). It is shown tha…
Palladium-impregnated zirconia (LSCM/YSZ) composite anode is investigated in detail for the direct utilization of methane in solid oxide fuel cells (SOFCs). Impregnation of Pd nanoparticles significantly promotes the electrocatalytic activity of LSCM/YSZ composite anodes for the methane electro-oxidation reaction in w…
This paper reviews ongoing progress in exploring the mechanistic origins of photoinduced structural modification in chalcogenide glasses (ChGs). These findings, reported by groups at the University of Central Florida, Clemson University, and throughout other research programs within the United States and abroad, have…
Octahedral Au nanocrystals with localized surface plasmon-assisted enhancing optical properties can be prepared in aqueous solution via the forced reduction of Au ions by ascorbic acid through the addition of NaOH.
We have shown that the Cr deposition process at (LSM) and (LSCF) cathodes of solid oxide fuel cells (SOFCs) is kinetically limited by the nucleation reaction between the gaseous Cr species and nucleation agents. In the case of the LSM electrode, the nucleation agent has been identified to be manganese species generate…
Experiments carried out to induce chirality into liquid crystals by means of photochemical procedures are reviewed. After basic considerations on the techniques used to detect supramolecular chirality in such organizations, the present Feature Article is focused on chiral photoinduction experiments performed on calami…
The design of electromagnetic invisibility cloaks is based on singular mappings prescribing zero or infinite values for material parameters on the inner surface of the cloak. Since this is only approximately feasible, an asymptotic analysis is necessary for a sound description of cloaks. We adopt a simple and effectiv…
Magnesium alloys of AZ91D, AZ91D + (1, 3, 5) mass% Ca, and AZ91D + (0.5, 1) mass% CaO were cast and oxidized at high temperature in atmospheric air in order to study the effect of Ca and CaO on the oxidation. The microstructure of the CaO-added alloys was similar to that of the Ca-added alloys. Ca and CaO both formed…
In this paper, Te/carbon nanocables with tunable diameters and lengths have been synthesized via a simple in situ hydrothermal reduction−carbonization route by using Na 2 TeO 3 as the Te resource and vitamin C as the reduction agent and carbon source. At the same time, this synthetic route can be used to prepare Se/ca…
Ultra fine (2-3 nm) magnetite (Fe(3)O(4)) nano-particles are uniformly deposited on single-walled carbon nano-tubes (SWCNTs) pre-functionalised with carboxylic acid groups using microwave radiation. The deposition process involves chemical precipitation associated with continuous flow spinning disc processing (SDP), a…
In this work, different conditions for electrochemically roughening silver substrates were investigated to obtain the best surface-enhanced Raman scattering (SERS) performance. Experimental results indicate that Ag electrodes can be cycled in deoxygenated aqueous solutions containing 0.1 N HCl from −0.3 to +0.2 V vs.A…
Ru–Ta and Ru thin films ( in thickness) as diffusion barrier for Cu metallization on and Si substrates are studied. Experimental results show that the Ru–Ta film exhibits amorphous structure until annealing at , whereas the Ru film crystallizes in as-deposited and annealed states. Sheet resistances of and stacking lay…
The synthesis of well-defined, homodisperse oligoamine structures based on natural basic amino acids, so-called oligoamine "patches", is presented. They contain an intermediary number of cationic groups (exactly 11 amine groups) to allow sufficiently strong, but reversible, binding to anionic surfaces and polymers and…
Intrinsically-skinned asymmetric PANi hollow fibres, fabricated using a process of directly adding large organic acids to highly concentrated PANi solutions, show stability in a wide variety of organic solvents and have shown promising nanofiltration properties, giving high rejections of nanosolutes in acetone.
The synthesis of a hierarchical support, constituted of a network of SiC nanofibers deposited on a SiC foam host resulting in a ceramic material with a controlled macroscopic shape and associated high specific surface area superior to 50 m2 g−1, has been reported for the first time. The new composite combines the nano…
The coexistence of the charge-ordered phase and the ferromagnetic phase has a strong effect on the magnetocaloric property of the nanocrystalline Pr0.65(Ca0.6Sr0.4)0.35MnO3 of average particle size 36 and 78 nm. The temperature dependence of the magnetic entropy change shows a tablelike behavior for the sample with a…
Thick porous anodic films have been prepared using high voltages in a sulphuric acid based electrolyte. The use of H2SO4 low concentration, low bath temperature and the boric acid as modifier allows the anodic porous film to be significantly thickened preventing its chemical dissolution. A new relation including the P…
We report a rapid (within 15 minutes), simple, green, inexpensive, versatile, and reproducible method for the synthesis of Ag triangular and hexagonal nanoplates in aqueous phase under ambient atmosphere. The method involves reducing silver oxide (Ag2O) with hydrazine (N2H4) in the presence of trisodium citrate (TSC)…