Many oxides tend to form different structures (polymorphs) for small particles. High temperature oxide melt solution calorimetry has been used to measure the enthalpy as a function of polymorphism and surface area for oxides of Al, Ti, and Zr. The results confirm crossovers in polymorph stability at the nanoscale. The energies of internal and external surfaces of zeolitic silicas with open fram...

In the monomeric title titanium(III) compound, [Ti(C(12)H(21)N(2)Si)(2)Cl], the metal atom is surrounded by two N-silylated anilide ligands in an N,N''-chelating mode. The two ends of the N-Si-N chelating unit exhibit different affinity to the metal center. The Ti-N(amine) bond is longer than the Ti-N(anilide) bond by about 0.29 Å. The two ligands are arranged trans to each other and the mol-ec...

A nanocomposite (NC) of titanium (IV) oxide (TiO2) and molybdenum (VI) (MoO3) was synthesized using a hydrothermal route. Detailed analyses transmission electron microscopy, X-ray diffraction, fluorescence (XRF), Brunauer–Emmett–Teller (BET) isotherms, photoelectron spectroscopy, Raman, diffuse reflectance infrared Fourier transform spectroscopy were carried out confirmed the successful formati...

Iron oxides catalyze the conversion of hydrogen peroxide (H(2)O(2)) into oxidants capable of transforming recalcitrant contaminants. Unfortunately, the process is relatively inefficient at circumneutral pH values because of competing reactions that decompose H(2)O(2) without producing oxidants. Silica- and alumina-containing iron oxides prepared by sol-gel processing of aqueous solutions contai...

Bi3.25La0.75Ti3O12 ~BLT! thin films were grown on Pt/Ti/SiO2 /Si and on LaNiO3 ~LNO! buffered Pt/Ti/SiO2 /Si substrates using sol-gel processing. Scanning electron micrographs showed the BLT films are composed of peg-like or platelet-like grains depending upon annealing temperature and the substrate type. Large platelet grains were found in BLT films deposited on the LNO/Pt/Ti/SiO2 /Si substrat...

TixSi1-xO2 thin films appear as promising materials to replace SiO2 for DRAM devices. For the effective down scaling, these mixed oxides should combine best properties from (low leakage current) and TiO2 (high dielectric constant). In this study, were deposited by low pressure PECVD. Varying Titanium Tetra-Isopropoxide (TTIP) Hexamethyldisiloxane (HMDSO) precursors flow rate allows us obtain na...

The Ni-Ti-Si composite coatings were successfully fabricated on Ti6Al4V by laser cladding. The microstructure were studied by SEM (scanning electron microscopy) and EDS (energy dispersive spectrometer). It has been found that Ti₂Ni and Ti₅Si₃ phases exist in all coatings, and some samples have TiSi₂ phases. Moreover, due to the existence of these phases, coatings presented relatively higher mic...

Devices composed of transparent materials, particularly those utilizing metal oxides, are of significant interest due to increased demand from industry for higher fidelity transparent thin film transistors, photovoltaics and a myriad of other optoelectronic devices and optics that require more cost-effective and simplified processing techniques for functional oxides and coatings. Here, we repor...

Titanate compounds have been recognized as key materials for understanding the coupling of magnetism and orbitals in strongly correlated electron systems. In the perovskite Ti oxide RTiO3 (where R represents the trivalent rare-earth ions), which is a typical Mott–Hubbard insulator, the Ti t2g orbitals and spins in the 3d1 state couple each other through the strong electron correlations, resulti...