Materials Literature
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The crystal chemistry of six crystals of general formula K 2 [M 2+ (H 2 O) 6 ](SO 4 ) 2 , with M 2+ = Mg, Fe, Co, Ni, Cu, and Zn, was investigated by single-crystal structure analysis to determine the effects of the chemical variation of M 2+ on the structural environment surrounding K, M, and S sites. Results indicat…
Carbon-coated copper (C/Cu) nanoparticles with a size of 50–80 nm were synthesized through a simple solid-state reduction reaction. The reaction process and optical properties were subsequently explored.
Two undecanuclear 3d-4f clusters with the general formula {Mn(III)(4)Mn(IV)Ln(III)(6)}, where Ln = Gd or Tb, were synthesized, with both showing large spin ground states, and the Tb species acting as a single molecule magnet.
In this letter, we illustrate that a metafilm (the two-dimensional equivalent of a metamaterial, also referred to as a metasurface) can be designed to have transmission and reflection properties that are independent of the angle of the incident wave. We show theoretically and discuss physically why this behavior occur…
The first report regarding SOD activity of metallocorroles, investigated via the combination of the cytochrome C assay, pulse radiolysis, and electrochemistry, is used for identifying the main criteria needed for achieving good performance, as well as for elucidating mechanistic aspects of their action.
A new family of amine- and ammonium-terminated carbosilane dendrimers of the type Gn-[Si(CH2)3N(Et)CH2CH2NMe2]x and Gn-{[Si(CH2)(3)N+R(Et)CH2CH2N+RMe2]x(X-)y} (where n = 1, 2 and 3; R = H, X = Cl; R = Me, X = I) respectively has been synthesized by hydrosilylation of N,N-dimethyl-N'-allyl-N'-ethyl-ethylenediamine, [(C…
A solvent-responsive polymer nanocapsule swells and deswells in response to a change in solvent composition, and the permeability of the shell of the nanocapsule can be controlled simply by swelling and deswelling; encapsulation and release of a fluorescent dye is achieved by a swelling-deswelling-swelling cycle.
The introduction of [Mn(salen)(H2O)]2(ClO4)2.H2O ({Mn(III)2}) into the polyoxometalate (POM) systems Na3[XMo6(OH)6O18] (X = Al and Cr) led to the isolation of new {Mn(III)2}-POM composite materials with single-molecule magnetic behaviour.
A vertically aligned peptide nanowire film, prepared by the self-assembly of diphenylalanine upon exposure to fluorinated aniline vapor at high temperature, exhibits a superhydrophobic property due to its nanoscale roughness and low surface free energy. We fabricated a self-cleaning, superhydrophobic surface by hierar…
In this paper, we study the existence and long-time behavior of global strong solutions to a system describing the mixture of two viscous incompressible Newtonian fluids of the same density. The system consists of a coupling of Navier-Stokes and Cahn-Hilliard equations. We first show the global existence of strong sol…
Abstract Indium tin oxide (ITO) layers are widely used to make electrodes in measuring cells, because these layers are transparent and electrooptical investigations can be performed using such prepared cells. It was found during the dielectric spectroscopy measurements, performed for smectic liquid crystalline mixture…
Microstructure developments under fluorine plasma have been investigated in the Al2O3 ceramics containing artificial pores with controlled purity. The erosion behaviors by fluorine plasma consisted of a uniform erosion throughout the specimen surface and local erosions around the artificial pores and defects such as i…
A series of novel mesoporous silica materials with ultra-large pores (20 to 40 nm in size), interconnected channel structure, thick walls (15 to 20 nm), high hydrothermal stability and selective protein adsorption were synthesized via a new synthetic strategy. We used Brij-56 and Brij-97 as templates and ethyl acetate…
A two-stage method for the preparation of -doped is reported. It was observed that the emission intensity is significantly enhanced up to 30% by the two-stage method. The critical concentration of was found to be and the critical radius was . The broad excitation band and strong emission indicate that the phosphor cou…
The Journal of Aerospace Technology and Management is a techno-scientific publication serialized, edited, and published by the Institute of Aeronautics and Space (Instituto de Aeronáutica e Espaço-IAE).
We present an overview of very recent advances in the engineering of magnetic networks based on octacyanometalates. The selected magnetic networks of CuIIWV, NiIIWV and MnIILNbIV (L – organic bridging linker) illustrate the possible strategies for tuning of the magnetic characteristics. The combination of magnetic ord…
We demonstrate the synthesis of LiBH(4) from LiH and AlB(2) without the use of additional additives or catalysts at 450 degrees C under hydrogen pressure of 13 bar to the following equation: 2LiH + AlB(2) + 3H(2)<--> 2LiBH(4) + Al. By applying AlB(2) the kinetics of the formation of LiBH(4) is strongly enhanced compar…
Ultrasonic cleaning device was modeled and the collapse of a single bubble in an ultrasonic pressure field was studied using a finite-volume 2D axisymmetrical model. The pressure field was generated with the bottom of a container oscillating at 33 kHz. Spherical air bubble of resonance size was induced into water near…
The biopolymer chitosan has shown great potential for a tremendous number of applications despite the fact that typical chitosan preparations are always mixtures of different chemical entities, natural impurities and process-induced impurities. However, chitosan preparations described in the literature or offered on t…
In this study, we investigated the influence of the surface treatment of Al nanoparticles on the electrical properties of linear low density polyethylene composites. Octyl-trimethoxysilane was used as a nonpolar silane coupling agent for the surface treatment of Al nanoparticles. It was found that the incorporation of…