Materials Literature
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Well‐defined and stoichiometric spherical particles of BaTiO 3 of narrow size distribution were produced at 82° and 92°3C by precipitation from chloride solutions in a strong alkaline environment. The size of the particles can be tailored in the range from ≅10 3 to 70–80 nm by increasing the barium concentration from…
We use the strategy of diamagnetic substitution for obtaining information on the crystal field effects in paramagnetic rare earth ions using the homologous series of compounds with the diamagnetic tropolonato ligand, Ln(Trp)(HBPz(3))(2), and the paramagnetic semiquinone ligand, Ln(DTBSQ)(HBPz(3))(2), (DTBSQ = 3,5-di-t…
A set of differential equations describing the current and voltage distribution in a split-ring resonator is derived and solved analytically. The resonant frequencies may be obtained from the solution of a characteristic equation. An approximate solution for the lowest resonant frequency agrees with that obtained by h…
A series of new compounds o-n-hydroxy-p-n-hexadecanoyloxybenzylideneaniline and its substituted derivatives was synthesized from the esterification of palmitic acid with intermediary Schiff bases, which posssess various terminal substituents X (X = H, F, Cl, Br, OCH3, CH3, and C2H5). All compounds possess mesomorphic…
Acid-degraded sericin powder (AC-SP) was prepared from aqueous solution containing citric acid-degraded sericin polypeptides of Bombyx mori. The morphological and biochemical properties of AC-SP were compared with those of alkali-degraded sericin powder (AL-SP) and hot-water degraded sericin powder (HW-SP). Based on a…
In order to expand the few known examples of dinuclear iron(II) compounds displaying (weak) intradinuclear exchange coupling and spin-crossover on one or both of the iron(II) centres, various dinuclear compounds have been synthesised and assessed for their spin-crossover and exchange coupling behaviour. The key aim of…
The bimetallic complexes [[Fe(III)(phen)(CN)4]2Cu(II)(H2O)2].4H2O (1), [[Fe(III)(phen)(CN)4]2Cu(II)].H2O (2) and [[Fe(III)(bipy)(CN)4]2Cu(II)].2H2O (3) and [[Fe(III)(bipy)(CN)4]2Cu(II)(H2O)2].4H2O (4) (phen = 1,10-phenanthroline and bipy = 2,2'-bipyridine) have been prepared and the structures of 1-3 determined by X-r…
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This paper focuses on developing a reproducible method for reducing calcium carbonate scale formation on heated surfaces where scaling can cause serious problems. It is known that calcium carbonate precipitation is sensitive to impurity ions, such as iron and zinc, even at trace concentration levels. In this paper two…
Abstract A quasi‐solid‐state, dye‐sensitized photoelectrochemical solar cell employing a gel electrolyte obtained by sol–gel chemistry is described. The gel electrolyte is based on a ureasil precursor (i.e., a poly(propylene oxide) oligomer end‐capped by triethoxysilane groups through urea bridges) and sulfolane and i…
Lithium perchlorate has been dissolved in tetra(ethylene glycol) dimethyl ether (tetraglyme or G4) to obtain (G4)n–LiClO4 mixtures with 1/2 ≤ n ≤ 80. The conformational changes and ionic interactions occurring in the crystalline and liquid phases as a function of temperature and salt concentration have been investigat…
Shape memory and superelasticity properties of Nitinol have allowed the development of many novel medical devices. The intent of this paper is to approach the shape memory effect from the perspective of the attributes of a simple, yet elegant Nitinol device, the Homer Mammaloktrade mark needle localizer. Manufacturing…
Silk sericin extracted from a cocoon was sulfated by chlorosulfonic acid. Sulfation of sericin was confirmed by FT-IR and the reaction efficiency was calculated as 44.9%. 1H-NMR suggested that sulfation mainly occurred at serine residues in the sericin molecule. The sulfated sericin was separated in three fractions by…
Sr2SiO4 ∶ Eu3+ shows orange-red emission of Eu3+ substitutively present in two different Sr sites. The light-induced spectral changes from orange-red sharp line emission to yellow-white broad band are observed in Sr2SiO4 ∶ Eu at room temperature under irradiation with short UV or X-rays. The spectral changes are attri…
We report on the chemical and electrochemical corrosion of Ti, and in HCl and solutions. The chemical corrosion of under conditions similar to those used industrially for the electrolysis of HCl (15% HCl, 65°C) is significantly better than that of pure Ti, indicating that it could be a promising substrate for dimensio…
Young's modulus, hardness and fracture toughness of highly ordered nanoporous alumina (PAA) were measured by nanoindentation and Vickers microindentation. A finite element model that accounts for the anisotropy and the pores was developed to extract the Young's modulus and hardness values from the experiments. The mea…
Polyaniline(PANI) microwires containing CdS nanoparticles have been prepared by introducing hydrogen bonding and/or electrostatic interaction between mercaptocarboxylic acid capped CdS nanoparticles and PANI. SEM and TEM proved them to be wire-like structures. PL spectra of the PANI/CdS complex is blue-shifted by 14 n…
Thin films of tungsten oxide, titanium doped tungsten oxide and overlayers of titanium oxide/tungsten oxide have been produced by aerosol assisted CVD (AACVD) at 400 °C. The films were crystalline monoclinic WO3 by XRD, showing strong preferred orientation in the (0 2 0) plane. Films were blue on deposition (WO3−x; x…
This paper addresses some of the underlying statistical assumptions and issues in the collection and refinement of powder diffraction data. While standard data collection and Rietveld analysis have been extremely successful in providing structural information on a vast range of materials, there is often uncertainty ab…
Magnetic nanodot arrays were prepared from thin film templates of cylinder-forming polystyrene-polylactide diblock copolymers by first annealing the films to obtain PLA cylinders oriented perpendicular to the surface, then selectively staining the PS matrix with RuO4 vapors, followed by etching the cylinders by O2-rea…