Now showing items 21-30 of 62
Solution-processable barium titanate and strontium titanate nanoparticle dielectrics for low-voltage organic thin-film transistors
A series of solution-processable oleic-acid capped barium titanate and strontium titanate nanoparticles was synthesized and spin-coated to form homogeneous high-k dielectric films for organic thin-film transistors (TFTs). ...
Novel porous anatase TiO2 nanorods and their high lithium electroactivity
We demonstrated a simple approach for the synthesis of a kind of novel porous anatase TiO2 nanorods. The method is based on a reaction in composite-hydroxide eutectic system and normal atmosphere without using an organic ...
K10[Co4(H2O)2(B-α-SiW9O34H)2]·21H2O : a sandwich polyoxometalate based on the magnetically interesting element cobalt
The magnetism of a sandwich tetracobalt(II) substituted tungstosilicate K10[Co4(H2O)2(B-α-SiW9O34H)2] · 21H2O has been studied based on an isotropic Heisenberg model supplemented by a zero-field splitting term.
Calcium-lead fluoro-vanadinite apatites. I. Disequilibrium structures
The synthetic vanadinites (PbxCa10-x)(VO4)6F2δ, 1 < x < 9, adopt a P63/m apatite structure with 9.7590 (1) ≤ a ≤ 10.1179 (1) Å and 7.0434 (3) ≤ c ≤ 7.4021 (1) Å. The partitioning of calcium ...
Study of calcium/lead apatite structure type for stabilising heavy metals
(CaxPb10-x)(VO4)6F2 apatites were synthesised and their microstructures were studied using powder X-ray diffraction, scanning electron microscopy and transmission electron microscopy before and after leach testing. X-ray ...
Syntheses, structures and properties of a series of photochromic hybrids based on Keggin tungstophosphates
Three inorganic–organic hybrids based on Keggin tungstophosphates and lanthanides, [Pr(NMP)6(PW12O40)]n (1), [Eu(NMP)6(PW12O40)]n (2), and [Er2(NMP)12(PW12O40)][PW12O40] (3) (NMP=N-methyl-2-pyrrolidone), have been synthesized ...
Self-organized nanocomb of ZnO fabricated by Au-catalyzed vapor-phase transport
Based on a vapor-phase transport process, self-organized nanocomb structures of ZnO were fabricated on Au-coated Si substrate by employing a mixture of ZnO and graphite powders as source materials. The morphology of the ...
Model apatite systems for the stabilization of toxic metals : I, calcium lead vanadate
Apatites of composition (Ca10−xPbx)(VO4)6F2 with 0 ≤x≤ 9 were synthesized by sintering in air at 800°C the oxides of calcium, lead, and vanadium that were mixed with calcium fluoride. Variations in lattice parameters, grain ...
Electron irradiation induced transformation of (Pb5Ca5)(VO4)6F2 apatite to CaVO3 perovskite
Crystallochemical changes of (Pb5Ca5)(VO4)6F2 apatite under electron irradiation were examined by transmission electron microscopy. The apatite, a synthetic analog of vanadinite, was moderately stable towards a less intense ...
An investigation of structure, magnetic properties and magnetoresistance of Ni films prepared by sputtering
Ni films were deposited by magnetron sputtering with a relatively high deposition rate (0.5 nm/s). We have investigated the structure and magnetic properties of Ni films with different thicknesses. Strongly reduced ...