Materials Literature
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Agaite, Pb 3 Cu 2+ Te 6+ O 5 (OH) 2 (CO 3 ), is a new tellurate from the Aga mine on Otto Mountain near Baker, California, U.S.A. The new mineral is known from only one specimen. It occurs on quartz in association with cerussite, Br-rich chlorargyrite, chrysocolla, goethite, khinite, markcooperite, muscovite, phosphoh…
In this work, MnOx nanomaterials with different crystallographic types and crystal morphologies \i.e., one-dimensional ɑ-MnO2 nanotubes, multiple branched γ-MnOOH nanorods and mixed-valent MnOx nanoflowers) have been fabricated from MnO2 nanoparticles via hydrothermally fine-tuning solution media without any template…
The microstructure of a cured state characteristic of a wide variety of low-concentration homochiral solutions in comparison with that of the condensed phase formed in achiral solutions is studied using optical and atomic force microscopy and X-ray diffraction analysis.
The effect of treatment on the de-oxygenation and restoration of pi-pi conjugation of graphene oxides (GO), through basic (sodium hydroxide (NaOH), sodium borohydride (NaBH4), hydrazine hydrate, and NaBH4 and hydrazine hydrate) and neutral (superheated H2O) reducing agents has been studied. Reduced GO samples were ext…
Violet-blue luminescence from Si nanostructures has been widely investigated, because of its potential use in optoelectronic and bioimaging devices. However, the emission mechanism in multiform Si nanomaterials remains unclear. In this contribution, Si nanocrystals (NCs) with zincblende structure and visible violet-bl…
Using the polyethylene-polypropylene glycol (F127) as raw material, ordered mesoporous carbon (OMC) was synthesized by the template method. The structure and morphology showed that the ordered mesoporous carbon had orderly rules and the width of wall was 10 nm. Constant current charge and discharge, cyclic voltammetry…
Aqueous dispersions of poly(acrylic acid) (PAA) or polystyrene sulphonic acid (PSS) doped polyanilines (PANIs) designated as PANI-PAA and PANI-PSS, respectively were prepared by in-situ polymerization of aniline in the presence of above acids (PAA and PSS). These dispersions were coated over cotton fabrics by dip coat…
Irradiation effects on the properties of alumina trihydrate (ATH) / low-density polyethylene (LDPE)/ ethylene vinyl acetate (EVA) / calcium stearate (CS) have been studied and confirmed that EVA and CS addition to the polymeric blends have improved the mechanical properties. ATH addition increased the cross-linking de…
Abstract Porous Keplerate‐type molybdenum‐oxide nanocapsules – encapsulated into cationic surfactants – act as transporting systems for alkali cations through supported liquid membranes. The transport is based on the ability of the nanocapsules containing water molecules inside their cavities to attract and release th…
Microhardness is a basic controlled quality parameter according to functional coatings, which is linked with a number of physico-chemical properties, such as coating strength, abrasion resistance, resistance to deformation, life. Life of the coating from a diagnostic point of view is influenced by chemical, physical,…
A new approach to study the flow-induced orientation in LC polymer-based nanocomposites has been developed. This approach is a combination of optical, mechanical, and X-ray methods that allowed us to “visualize” physical processes taking place in these systems under flow. The HPC/water solution (matrices) concentratio…
This paper presents some mitigation solutions for improving the performance of EHV post station insulators under severe icing conditions using modified grading rings. For this purpose, numerical simulations using the finite element method (FEM), implemented by the commercial software Comsol Multiphysics, were performe…
Magnetoelectric (ME) coefficients for bending excitation in static magnetic fields and the bending response of multilayer composites with alternating magnetostrictive (MS) and piezoelectric (PE) layers on a substrate are investigated systematically. Theory and closed-form analytic solutions for the static magnetoelect…
In this paper, a phenomenological model of stroke-dependent magnetic characteristics of proportional solenoids is proposed. The Discrete Dynamic Preisach hysteresis model is extended so as to map a bivariate hysteresis of the flux linkage depending on both, the coil current and anchor stroke. Moreover an elaborated an…
ZnO nanowires have an enormous potential for applications as ultra-violet (UV) photodetectors. Their mechanism of photocurrent generation is intimately related with the presence of surface states where considerable efforts, such as surface chemical modifications, have been pursued to improve their photodetection capab…
Low temperature plasma (LTP) treatment of textiles has emerged as one of the environmentally friendly surface modification methods. In this work, the effect of LTP treatment generated by a dielectric barrier discharge technique (DBD) under atmospheric pressure by using three different gases; oxygen, nitrogen and air,…
In this work, the effect of blend composition and previous photodegradation on the biodegradation of polypropylene/poly(3‐hydroxybutyrate) (PP/PHB) blends was studied. The individual polymers and blends with or without the addition of poly(ethylene‐ co ‐methyl acrylate‐ co ‐glycidyl methacrylate) [P(E‐MA‐GMA)] as a co…
The problem of improving the accuracy of predicting the tribomechanical characteristics of joints made of polymeric composites is addressed. The application of the two-level method of calculations is shown to determine the contact parameters and volume stress strained state of gears made of disperse-reinforced polymer…
Degradation of polypropylene (PP) composites at elevated temperature for prolonged period has shortened the lifetime of PP composites. Thus, variety of fillers has been incorporated into PP matrix to improve thermal degradation stability. The effects of titania and nanosilica in PP reinforced with oil palm empty fruit…
Luminescence spectra of silver-containing oxyfluoride glasses have been investigated in the excitation spectral range of 360–480 nm. Analysis of the luminescence spectra shows that silver in oxyfluoride glasses that contain no strong reducers and were subjected to heat treatment affecting redox processes exists in the…