Materials Literature
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The effect of SiO2/Al2O3 ratio on crystallization and dielectric properties of barium strontium titanate (BST) glass-ceramics has been investigated by differential scanning calorimetry (DSC), X-ray diffractometry (XRD), Raman spectrometry, and dielectric measurements. The experimental results showed that appropriate S…
A good Ag‐based SERS substrate has been prepared by one‐pot reaction using methyl cellulose as a template. Effects of methyl cellulose concentration, silver ammonia chloride solution concentration, reaction duration, and reducing agent on silver nanoparticles were discussed in this paper. The performance of the obtain…
Poly(cyclohexene oxide) (PCHO)/clay nanocomposites were prepared by means of in situ photoinitiated cationic polymerization with initiator moieties immobilized within the silicate galleries of the clay particles. Diphenyliodonium molecules were intercalated via cation exchange process between Cloisite Ca and diphenyli…
This study focuses on the characterization of MWNT‐epoxy composites for different MWNT concentrations of 0–7 wt% by correlating different dynamic analysis techniques, including DMA, impedance, and DEA. An optimum composition was established at 0.1 wt% MWNTs corresponding to the best MWNT dispersion which resulted in t…
Gold nanorods with a relevant aspect ratio were synthesized in high yields and good selectivities in the presence of ammonium surfactants bearing tunable hydroxyalkylated headgroups. The role of the OH function was demonstrated and the dynamics of the growth process were investigated through UV-vis measurements.
Axially chiral alleno-acetylenes, modified with lateral aryl groups via short and convenient synthetic pathways, are presented as efficient chiral dopants for producing cholesteric liquid crystals.
A novel universal approach to cross-linking of protein macromolecules on the surface of magnetite nanoparticles has been developed. The approach is based on protein liability to free-radical modification, leading to the formation of intermolecular covalent cross-links. Free radicals are locally generated on the surfac…
The MOF [Ag (qox) (4-hb)] 1 , was obtained at room temperature by the reaction of AgNO 3 , quinoxaline (qox) and 4-hydroxy benzoate (4-hb). A cluster molecule containing two silver atoms, two qox and two 4-hb ligands is considered the basic building block of the structure of 1 . 3D-network structure is created via H-b…
We study the interactions of NO2 gas molecules with Rh nanoparticles supported on graphene, using first-principles molecular dynamics in the Car-Parrinello scheme. The stability, morphology, adsorption energies of various models of Rhx nanoparticles (x = 1, 3, 10, 20) supported on graphene, and the binding of NO2 mole…
Uniform CeO2 hollow spheres were successfully fabricated on a large scale via calcination of the corresponding spherical Ce–organic precursor. The solution- and solid-based shape and crystal structure evolution can be consecutively controlled. Sm-doped CeO2 hollow spheres have also been synthesized and their enhanced…
A new interesting category of higher thermally stable polyazomethines containing ferrocene in the polymers main chain 6a – e was synthesized by solution‐polycondensation reaction of 1‐( m ‐formylphenyl)‐1′‐(5‐formyl‐2‐methoxyphenyl)‐ferrocene monomer 4 with different aliphatic and aromatic diamines. A model compound 5…
Lead-free potassium sodium niobate (KNN) ceramics were prepared with lithium and tantalum modification. Structural properties were investigated. Impedance spectroscopy was used as a tool to analyze electrical behavior of ceramics as a function of frequency from 100 Hz to 10 MHz at a temperature range from 573 K to 798…
Magnetoresistive Sr2FeMoO6 thin films were grown by pulsed laser deposition with three different thicknesses 150 nm, 270 nm and 500 nm. Structural, magnetic and magneto-transport properties of the films were measured. Structural properties showed that impurity phases are formed when the film thickness exceed limiting thic…
CuInS2 quantum dots encapsulated in ZnS shells have emerged as less-toxic alternatives to cadmium-based nanoparticles. A well-established synthesis route for hydrophobic CIS/ZnS core/shell QDs has been developed using dodecanethiol as a ligand, solvent and source of sulfur, although the transfer of these nanoparticles…
We report a facile, versatile and highly efficient self-patterning method for depositing functional coatings for poly(dimethylsiloxane) (PDMS) microfluidics, inspired by the wetting phenomena of the desert beetle and plant leaves. Driven by the solvent evaporation, fluoropolymer coatings have been demonstrated to depo…
The reaction of Mn(OBz)2·4H2O (OBz = benzoate) with hmt (hmt = hexamethylenetetramine) in CH3CN affords a mixed-valence hexanuclear complex [MnIII2MnII4O2(hmt)4(OBz)10] (1). The complex has been characterized in solid state by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction analysis. X-Ray cry…
A number of polymethine dyes based on a BODIPY nucleus annelated with a pyridone ring have been synthesized. The merocyanines of this series are long-wavelength and intensive dyes. Obtained for the first time, asymmetrical anionic boradipyrromethenecyanines are also interesting from another viewpoint. These compounds…
When liquids are classified using Tg-scaled Arrhenius plots of relaxation times (or relative rates of entropy increase above Tg) across a "strong-fragile" spectrum of behaviors, the "strong" liquids have always appeared rather uninteresting. Here we use updated plots of the same type for crystal phases of the "rotator…
Epitaxial thin films of the 10 layer cubic perovskite superstructure Ba1.7Ca2.4Y0.9Fe5O13 were grown by pulsed laser deposition, retaining the six distinct cation sites found in the bulk material. Growth on single crystal strontium titanate (STO) (0 0 1) substrates changes the observed symmetry from orthorhombic to te…
The high susceptibility to corrosion of magnesium alloys may lead to their rapid degradation in the human body and thus greatly jeopardizes their applications as potential biodegradable bone implant materials. To improve their mechanical properties and biocompatibility, Cu-DLC films were coated on Mg alloys in a mid-f…