Materials Literature
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Solid Lipid Nanoparticles (SLN) are already under investigation as a pharmaceutical tool able to change the pharmacokinetic and biodistribution of carried molecules. SLN are able to target drugs to lymph after duodenal administration and to overcome the Blood Brain Barrier (BBB). In this study, superparamagnetic SLN h…
A brief review is presented of a novel method of high-frequency magnetic resonance spectroscopy, which sweeps the frequency at a fixed magnetic field, including zero field. We describe the main features of this frequency-domain spectrometer which works in the spectral range from 30 GHz to 1.5 THz and at magnetic field…
The isomorphous insertion of 1–2 wt% of Ti into the MFI framework leads to a Titanium silicalite-1 (TS-1) material, which is an active and highly selective catalyst in a remarkable number of low-temperature oxidation reactions with aqueous H2O2 as oxidant. Such Ti(IV) species exhibit a local Td-like symmetry, forming…
A terpyridine ligand is covalently linked to a hexamolybdate cluster through the Mo-N imido bond, paving the way for the preparation of hybrids containing covalently bonded transition metal complexes and polyoxometalate clusters.
A new bisurea gelator derived from 2,6-diaminopyridine has been developed. It efficiently gelates common organic and liquid crystalline (LC) solvents by forming elongated self-assembled fibres in solvents. X-Ray crystallography and 1H NMR measurements reveal that two urea groups in pyridine-based bisurea compounds for…
The substitutional range and cell parameter evolution of fast oxide-ion conductors La2−xRxMo2−yWyO9 (R = Nd, Gd) are investigated. In the whole series, the cubic β-La2Mo2O9 structural type is stabilized at room temperature. The effects on reducibility of both single and double substitutions are presented. Lanthanum su…
The hydrothermal reaction of MoO3, [Ni(CH3CO2)2] x 4H2O, tpypyz, ethylenediphosphonic acid and water yields the 2D material [[Ni4(tpypyz)3][Mo5O15(O3PCH2CH2PO3)]2] x 23H2O (1 x 23H2O), constructed from [Mo5O15(O3PCH2CH2PO3)]4- clusters linked in one-dimension through the ethylene tethers of the diphosphonate component…
α-Al2O3 Nanobelts and nanosheets with different morphologies and sizes have been successfully synthesized by a simple chemical route from H2O and Al in an argon atmosphere. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations show that the as-synthesized α-Al2O3 nanostructures con…
A chemical approach to high surface area titanium nitride based materials is presented using a ligand-assisted ammonolysis reaction of solid TiCl4 complexes at 973 K. The specific surface area of the materials ranges from 37 to 230 m2 g−1 depending on the solid precursor and is higher as compared with conventional gas…
We investigate how the normal energy transport is realized in one-dimensional quantum systems using a quantum spin system. The direct investigation of local energy distribution under thermal gradient is made using the quantum master equation, and the mixing properties and the convergence of the Green-Kubo formula are…
Photochromic researches on spiropyrans, spirooxazines, naphthopyrans, chalcones, diarylethenes, and fulgides published in 2002 have been reviewed. Photochromic compounds are classified into two categories, thermally reversible compounds such as spiropyrans, spirooxazine, naphthopyrans, and chalcones, and thermally irr…
Rate of hydrogen permeation was measured under static as well as dynamic mechanical deformation conditions. Cylindrical tensile test specimens were used for the study and hydrogen permeation was measured electrochemically. It was observed that the hydrogen diffusivity decreased as plastic deformation increased for the…
Various π-conjugated polymers have been obtained by using organometallic polycondensations mediated by organotransition metal complexes. For example, Ni(0) complex-promoted dehalogenation polycondensation of dihaloaromatic compounds X-Ar-X affords poly(arylene)s, -(-Ar-)-n. Pd-catalyzed polycondensation gives poly(ary…
Oxidative thermal degradation of organically modified montmorillonite (OM) and muscovite was studied using conventional and high-resolution TGA. Analysis of the ultra thin alkylammonium film covering the mineral surface revealed a correlation between thermal stability and extent of cation exchange. In the final stage…
Au–Ag and Au–Cu nanoparticles of various compositions were synthesized in chloroform and their physical properties were characterized by employing various techniques such as UV-Visible spectroscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The synthesized alloy nanoparticles of diameter c…
The hydration of (001) surfaces of hydroxyapatite (Ca10(PO4)6(OH)2) was elucidated by means of molecular dynamics simulation. The investigated surface types were derived from differently cutting the ideal crystal structure perpendicular to the [001] direction. Three surface types with rather different electrostatic ch…
A tripodal cholamide-based hydrogel has been employed as a template to synthesize inorganic nanotubes. Besides nanotubes of oxides such as SiO2, TiO2, ZrO2, WO3 and ZnO, nanotubes of sulfates such as the water-soluble ZnSO4 as well as of BaSO4 have been obtained using this method. An advantage of the use of the hydrog…
Local electrochemical impedance spectroscopy (LEIS) has been applied to study the corrosion behavior of an as-cast AZ91 magnesium alloy. The results are compared with those obtained from traditional electrochemical impedance spectroscopy and discussed in relation with previously published results. They confirm the spe…
The electromagnetic scattering from a conducting cylinder coated with metamaterials, which have both negative permittivity and permeability, is derived rigorously by using the classic separation of variables technique.It is found that a conducting cylinder coated with metamaterials has anomalous scattering cross secti…
This paper reports a systematic investigation on photoluminescent (PL) properties of and -activated The excitation spectrum of consists of the strong CTS absorption and week f-f transitions of while the excitation spectrum of is composed of the strong d-f transition and weak f-f transitions of The charge transfer stat…