Materials Literature
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Catalytic performances of nanostructured mesoporous TiO 2 –ZrO 2 mixed oxides impregnated by Pd and/or Au were studied in toluene total oxidation in a fixed bed microreactor and with “operando” DRIFT. Mesoporous TiO 2 –ZrO 2 mixed oxides with various Ti:Zr mole ratio of 80/20, 50/50 and 20/80, high surface areas were…
White light emission across the extended visible region of the electromagnetic spectrum from the ZnO–porous silicon (PS) nanocomposite is reported. Nanocrystallites of ZnO were grown inside the spongy structures of PS by the chemical route of sol–gel spin coating. The property of the material arises from versatile int…
Abstract Zwitterionic “sandwiches” : Combined preparative, spectroscopic and theoretical studies on the syntheses, structures and electronic properties of zwitterionic iron(II) and cobalt(II) sandwich complexes [M( Me Tpmd) 2 ] containing κ 3 N ‐coordinated tris(pyrazolyl)methanide ligands ( Me Tpmd; see picture) are…
Abstract The influence of the choice of temperature, pH value, counter‐ion, deposition time, and seed layer on the morphology as well as electrical properties of ZnO films grown from chemical bath deposition (CBD) are discussed. Consequently, oriented ZnO films with various microstructures can be synthesized by contro…
Spin crossover: The photomagnetic properties of a series of [{Fe(NCS)(py-X)}(2)(bpypz)(2)] (NCS=thiocyanate, py=pyridine, X=4-Mepy, py, 3-Mepy, 3-Clpy and 3-Brpy, and bpypz=3,5-bis(pyridine-2-yl)pyazolate) binuclear complexes are close to the antiferromagnetic response of [{Fe(NCS)(3,5-dmpy)}(3)(bpypz)(2)] (3,5-dmpy=3…
A methodology to evaluate hysteresis losses in iron sheets under dc-biased inductions is presented in this work. Based on several experimental investigations of six different iron sheets used in the fabrication of electrical machines, an improvement of the classical Steinmetz equation is proposed. This technique can b…
Abstract Composites based on multiwall carbon nanotubes (MWCNTs) and the block copolymer styrene‐butadiene‐styrene with two different contents of styrene have been investigated and their electrical conductivity and mechanical properties have been evaluated. The composites were prepared by a solution casting procedure,…
A different ``Hubbard energy control'' mechanism of the insulator-metal transition (IMT) in Mott-Hubbard insulators is discussed. This mechanism can be initiated by the lattice compression and it is driven by a spin crossover of $3{d}^{5}$ ions from the high-spin state to the low-spin state. The spin crossover suppres…
The electronic coupling values and approximate energy transfer rates between semiconductor single-wall carbon nanotubes are calculated using two different approximations, the point dipole approximation and the distributed transition monopole approximation, and the results are compared. It is shown that the point dipol…
This paper investigates an efficient macroscopic modeling method for laminated iron cores made of grain-oriented silicon steel sheets. Under actual operating conditions, the material exhibits nonlinearity as well as a strong anisotropy resulting in a nonuniform distribution of the iron loss and the flux within each la…
Abstract The reaction of nickel thiocyanate with pyrazine in a 1:2 ratio leads to the new ligand‐rich 1:2 (ratio metal/ligand) compound [Ni(SCN) 2 (pyrazine) 2 ] n ( 1 ), in which the metal atoms are coordinated by four N atoms of pyrazine ligands and two N atoms of thiocyanate anions in a slightly distorted octahedra…
Cobalt doped zinc oxide nanorods Zn 1− x Co x O ( x = 0.01, 0.10) have been synthesized by a hydrothermal process with Zn(NO 3 ) 2 , Co(NO 3 ) 2 , NH 4 OH, CO(NH 2 ) 2 and C 2 H 5 OH at 150 °C for 1 h. X-ray diffraction and scanning electron microscopy were used to characterize the crystalline structure, size and morp…
We investigate how defects in bipolar shells of liquid crystal evolve when the boundary conditions for the nematic director n at the outer surface of the shell are changed from tangential to homeotropic. When the boundary conditions for n are tangential, these bipolar shells are characterized by the presence of two pa…
Hex nut: An emerging synthetic approach based on metal-organic coordination-polymer templates has been used to fabricate micro- and nanoscale crystals. By using a diverse range of molecular building blocks coupled with conventional synthetic techniques, it is possible to synthesize ZnO crystals with tailored sizes, sh…
The implementation of a new soft chemical constraint for the reverse Monte Carlo (RMC) program RMCProfile , based on bond valence sum (BVS) calculations, is described and its advantages for the analysis of `total scattering' diffraction data collected from disordered crystalline systems discussed. The inclusion of the…
Polynuclear lanthanide hydroxide complexes featuring the cubane-like [Ln(4)(mu(3)-OH)(4)](8+) [Ln = Eu(III), Gd(III)] cluster core have been synthesized by controlled hydrolysis of the lanthanide ions using nicotinic acid as the ancillary ligand. The synthetic procedure has been found to significantly influence the na…
We performed the stress analysis of a SPM motor core with the shrink fitting, and calculated the iron loss by FEM using the B-H curve and iron loss measured under a compressive stress. We examined the effect of shrink fitting on iron loss of an actual motor and the validity of the estimation of the iron loss by FEM an…
Self-assembly of peptide amphiphiles into nanostructures makes them attractive for a variety of applications in drug and peptide delivery. We here report on the interactions of micelles composed of a palmitoylated, pro-apoptotic peptide derived from p53 tumor suppressor protein with a human cancer cell line. Character…
Ternary oxides formed from zinc and indium have demonstrated potential for commercial optoelectronic applications. We present state-of-the-art hybrid density functional theory calculations for Zn-poor and Zn-rich compositions of the crystalline ${\text{In}}_{2}{\text{O}}_{3}{(\text{ZnO})}_{n}$ compounds. We reveal the…
According to a continuous medium theory, in very thin ferroelectric films with real metallic electrodes (or dead layers near the electrodes) the domain structure reduces to sinusoidal distribution of ferroelectric polarization.Such a sinusoidal structure was considered in 1980s for para-ferroelectric phase transition…