Materials Literature
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The New Zealand blackfoot abalone, Haliotis iris Gmelin, is among the few gastropods that precipitate both calcite and aragonite in their shells. The location, composition, and thickness of these mineral layers may affect color, luster, and strength of the shell, which is locally important in jewelry manufacture. Skel…
The silica-supported Zr(iv) dihydride [(triple bond)SiO)2ZrH2] reacts quickly and completely with methane to yield [(triple bond)SiO)2ZrMe2] through the intermediate [(triple bond)SiO)2ZrHMe], while its monohydride analogue [(triple bond)SiO)3ZrH] yields the monomethylated product [(triple bond)SiO)3ZrMe] slowly and i…
In this paper, n-type lead telluride (PbTe) compounds without doping were sucessfully prepared at high pressure and high temperature (HPHT). The carrier type was induced by the effect of pressure. The results of the electrical conductivity, Seebeck coefficient, thermal conductivity for n-type PbTe, which were measured…
The addition of ammonium chloride to a precursor solution improved the luminescence intensity of the phosphor synthesized by spray pyrolysis without postheating. With this addition, the luminescence intensity under vacuum ultraviolet (146 nm) excitation was increased 1.6 times, and reached 88% of a commercial phosphor…
Mesoporous titanium dioxide (TiO2) materials have been synthesized by a novel simple, template-free synthetic approach, which was carried out via nitric acid-catalyzed hydrolysis and polycondensation reactions of titanium(IV) n-butoxide. The as-prepared and calcinated mesoporous TiO2 materials are characterized by X-r…
ABSTRACT The availability of Fe(III)‐bearing minerals for dissimilatory Fe(III) reduction was evaluated in sediments from a petroleum‐contaminated sandy aquifer near Bemidji, Minnesota (USA). First, the sediments from a contaminated area of the aquifer, in which Fe(III) reduction was the predominant terminal electron…
Hexagonal hollow ZSM-5 tubes were synthesized using mesoporous silica with a worm-like morphology as the template. A new method for aluminium incorporation during the hydrothermal synthesis step was developed.
Abstract Summary: The applications of polyelectrolyte complexes range from large‐scale industrial products to special uses in biotechnology and medicine, yet one significant problem is their instability against changes in their environmental conditions, particularly the addition of salts. This concerns the colloidal s…
Four homologous series of symmetric bent-core molecules containing lateral fluorine or iodine substituents in the branches were synthesised and studied. Depending on the central ring and the lateral substituent the studied compounds exhibit a B7 phase or B2 type phases with anticlinic (SmCAPA) or synclinic (SmCSPA) in…
This work describes the use of hydrogen peroxide as oxidant for the selective oxidation of some alcohols in the presence of hexadecyl trimethyl ammonium decatungstate catalyst under simple reaction conditions. It includes the oxidation of cyclohexanol to cyclohexanone in the temperature range of 90 to 100 °C for 2 hou…
Ultra-thin multilayer films consisting of polyoxotungsceriumate cluster K17[CeIII(P2W17O61)2]·30H2O [Ce(P2W17)2] and polyallylamine hydrochloride were fabricated on quartz and ITO substrates by a layer-by-layer self-assembly method. The multilayer films were characterized by UV-vis spectra, cyclic voltammetry (CV) and…
A new amorphous high-Tg azo polymer with benzothiazole group in the side chain, poly{2-{4-[[N-(2-methacryloyl)ethyl]-N-ethyl]phenylazo}-6-nitro-benzothiazole} (pBTAMC), was prepared and its optical storage properties were investigated in thin films. Comparison is made with three push-pull azobenzene polymers: poly{4-[…
The effect of plasma treatment on surface characteristics of polyethylene terephthalate films was investigated using helium and oxygenated-helium atmospheric plasmas. Sample exposure to plasma was conducted in a closed ventilation test cell inside the main plasma chamber with variable exposure times. The percent weigh…
The influence of three exogenous ligands (acetate, formate and carbonate) on the condensation process of the [Mo2O4]2+ dioxocation with the [O3PCH2PO3](4-) group has been investigated. Four cyclic or bicyclic compounds have been isolated and characterized by X-ray diffraction studies. Two closely related acetato and f…
Silicon-bridged bis(benzene)chromium complexes (sila[1]chromarenophanes) undergo facile transition metal-catalyzed ROP at ambient temperature in the presence of Karstedt's catalyst to yield polychromarenylsilanes, the first homopolymers with main chains of Cr(arene)(2) and organosilane units.
To mark the 100th anniversary of cellulose diacetate in 2004, academic expertise on the physical and chemical properties of cellulose acetates (CA) is combined in this volume with industrial knowledge on technology and product properties.
The electrochromic mechanism of IrO 2 thin films was investigated with electrochemical quartz crystal microbalance and surface analyses such as X-ray photoelectron spectroscopy, Auger electron spectroscopy, and scanning electron microscopy. Prior to pulsed anodic current electrodeposition of IrO 2 thin film on indium-…
A straightforward grafting of a polycationic phosphorus-containing dendritic shell onto polystyrene nanoparticles leads to dendronized nanoparticles showing unique behavior.
Hyperthermophiles are a group of microorganisms that have their optimum growth temperature above 80 degrees C. More than 60 species of the hyperthermophiles have been isolated from marine and continental volcanic environments. Most hyperthermophiles belong to Archaea, the third domain of life, and are considered to be…
Ferrimagnetic glass-ceramics are useful as thermoseeds for hyperthermal treatment of malignant tumors, especially those located in deep parts of the body, since hysteresis loss heating occurs locally at the cancer site when they are implanted around the tumor and subjected to an alternating magnetic field. In the pres…