Materials Literature
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Abstract Novel FeII complexes with N4O2 donor sets having extended π-conjugated aromatic rings, [Fe(qnal)2]·CH2Cl2 and [Fe(qnal)2], show abrupt spin transitions at 220 and 265 K, respectively. Both complexes show LIESST effects below 80 K.
A novel process of surface modification for multiwalled carbon nanotubes (MWCNTs) by using electron cyclotron resonance plasma is proposed. The process uses a H 2 /O 2 gas mixture as etching gas and applies a bias voltage of −250 DCV to the process stage to extract and accelerate hydrogen and oxygen cations. The gener…
The review summarizes the synthesis and study of properties of the bioconjugates of chlorophyll a and bacteriochlorophyll a with carbohydrates, carboranes and other moieties, focusing on the synthetic methods of obtaining conjugates and preliminary biological testing thereof. Boronated chlorins and bacteriochlorins ca…
Single-phase hexaferrite compounds were obtained in a novel series of Dy-substituted Ba hexaferrites with nominal formula (Ba1-xDyx)Omiddot5.25 Fe2O3( x=0-0.30). The samples were prepared by the chemical coprecipitation method from nitrate precursors and calcination at T= 900-1200degC for 2 h. Analysis of XRD powder p…
In this paper, we investigate eddy current loss in divided Nd-Fe-B sintered magnets for synchronous motors, from both sides of measurement and finite element analysis. First, the basic experiments with an exciting coil and divided magnets are carried out. The results are compared with the 3-D finite element analysis t…
Determining the breakdown strength of dielectric films is tedious, as the breakdown strength at 1% breakdown probability is more relevant to system insulation design than the Weibull characteristic breakdown strength, and obtaining reasonable confidence limits at 1% breakdown probability requires very large numbers of…
DFT calculations, using the PW91, OLYP, and B3LYP functionals, have provided some of the first estimates of the relative energies of the Ni(I) and Ni(II) ligand anion radical states of hydroporphyrin complexes. Although the three functionals chosen sometimes yield discordant results, the results of this study are esse…
Using spectroscopic ellipsometry electro-optic effect was studied in lead zirconate titanate (PZT) thin films grown epitaxially on Nb-doped SrTiO3(001) substrates by RF magnetron sputtering. A uniaxial multilayer model analysis was applied to extract the linear and quadratic electro-optic coefficients from the shifts…
Oxide-assisted growth (OAG) mechanism produces high-density nonowires (NWs). Salient features of the existing models for this OAG mechanism and the fundamentals underlying this mechanism have been investigated in some detail. A simple, novel, malleable model for the OAG mechanism has been developed, and the concept of…
The synthesis is reported of new meta‐substituted quaterphenyls and several related dimers as dopants for nematic mixtures with flexoelectric properties. The number and nature of the terminal substituents is varied from apolar with a small dipole moment to polar with a strong dipole moment. The number of methylene uni…
Molecular data confirm that the Navicula s. s., i.e. Section Lineolatae, is a monophyletic group within the Naviculales. In trees constructed from three molecular markers, Hippodonta was consistently placed as sister group to Navicula s. s. supporting its independence as a genus separate from Navicula. There were thre…
Abstract Summary: The use of low‐cost adsorbent has been investigated as a replacement for the current expensive methods of removing dyes from wastewater. The sorption of acid dye (Evans Blue) from aqueous effluents onto anionic clays (hydrotalcite‐like) has been studied. Hydrotalcite may be an effective adsorbent of…
Carbon nanotubes possess unique properties that make them potentially ideal materials for various technological applications. However, a basic growth mechanism explaining the way metallic atoms interact with carbon to nucleate, grow and heal CNTs still needs to be understood. In this review paper we describe the mecha…
The paper presents resistivity and magnetization measurements on nearly stoichiometric Fe3Si films epitaxially grown on GaAs substrates by electron-beam evaporation in an ultrahigh vacuum chamber. In the low-temperature resistivity a T3 term was found in all samples. A term like that is known to describe the anomalous…
PIN-PMN-PT (Pb(Infrac12Nbfrac12)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3) single crystals with 26%-59% PIN were successfully grown by Bridgman technique. Elastic, dielectric and piezoelectric properties of ternary PIN-PMN-PT crystals were studied in comparison with PMN-PT (Pb(Mg1/3Nb2/3)O3- PbTiO3) crystals. It was demonstrated tha…
A nanofiber nonwoven textile with metallic magnetic material coating was fabricated, and the effect of electromagnetic wave shielding was evaluated. The nanofiber nonwoven textile with an average diameter of about 500 nm was spun by electrospinning. The metallic magnetic material was coated by sputtering on the textil…
The magnetic properties of electrical steel such as magnetization behavior and specific magnetic losses are related to the microstructure and texture of the steel. The interest in the case of FeSi-alloys is to realize a low intensity on the {111} fiber, which is a different goal than that of conventional steels, where…
Electron beam irradiation of amorphous GeSe4 thin films reveals formation of reliefs and trenches as a function of electron beam dose. Mounds as high as 115nm are observed at low electron beam dose and trenches as deep as 180nm at high dose. The geometry of trench and mound formation is examined as a function of elect…
The charge properties, under electron irradiation, of three types of glasses are studied by employing scanning electron microscope (SEM) associated with the technique called the electrostatic influence method. The experimental conditions are closed to those of typical field emission display (FED) operation. To determi…
Abstract In Lepidoptera and Trichoptera, a blend of sericin proteins seals the pair of fibroin filaments into the silk fiber that is coated by additional layers of adhesive sericins. The structure and function, and even the number of sericin proteins, are poorly known. Most sericin applications to date employ mixtures…