Materials Literature
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Abstract The magnitude and dimensionality of spin–spin interactions among 2,2,6,6-tetramethyl-1-piperidinyloxyl radical (TEMPO) molecules in a 1D nanochannel consisting of tris(o-phenylenedioxy)cyclotriphosphazene (TPP) were examined using electron spin resonance (ESR) spectroscopy. Dilution of TEMPO with 2,2,6,6-tetr…
Fluoro-edenite [NaCa2Mg5(Si7Al)O22F2], a new end-member of the calcic amphibole group, is present with both prismatic and fibrous morphologies in the altered volcanic products of the Monte Calvario locality, Biancavilla, on the flanks of Mount Etna, Sicily, Italy. Whereas the crystal chemistry of the prismatic variety…
We describe several unusual forms of natural graphite from an alkaline pegmatite that cross-cuts rischorrite in the Hackman Valley, Khibiny Massif, Kola Peninsula, Russia. The graphite occurs macroscopically in two forms: as spherical aggregates up to 2 cm in diameter of friable, radially aligned fibers ~20 μm in cros…
The electrochemical quartz crystal microbalance (EQCM) has been well established as a powerful tool capable of monitoring in situ an electrode-mass change down to the nanogram or sub-monolayer level in an electrochemical process. In this work an EQCM experiment to monitor the cyclic voltammetric deposition of a conduc…
We describe the shape and internal structure of polyhedral spheroids found in serpentinized peridotites. Serpentine spheroids resemble geodesic domes made of ~160 to 180 triangular facets. At facet edges, the nested layers bend by ~14° along their three <010> crystallographic directions, resulting in an onion-li…
Ecological theory based on the dynamic equilibrium model (DEM) suggests that maintenance of endemic taxa is most likely in stable, unproductive environments. We tested whether this hypothesis, which was developed mainly using terrestrial plant examples, held when applied to distributions of benthic freshwater diatoms…
Diamond-like carbon (DLC) coatings are frequently considered for biomedical applications due to their attractive tribo-mechanical properties combined with good biocompatibility. In the present work, DLC coatings have been deposited on 316L stainless steel (SS) substrates. The duplex approach consisted of surface nitri…
The paper presents results the aim of which was determining the most favorable conditions of ECT (electrostatic charge tendency) measurement taking of insulation oils in the spinning disk system. The work proved that a proper selection of the size and roughness of the disk surface makes the measured volume density of…
Abstract The technologically relevant aluminium alloy AA6016 was successfully processed using accumulative roll bonding to 8 cycles (∊ von Mises = 6.4) in order to obtain an ultrafine-grained microstructure with an average grain size of approximately 200 nm. With the aim of optimising the accumulative roll bonding pro…
The mechanism that limits the emission current of a carbon-nanotube-based cathode due to the temperature dependence of the emissivity of the nanotube is studied. This limitation has the character of thermal instability that shows up as an infinite increase in the emitter temperature after a certain emission current is…
In this study, a new extension of a micromechanical approach proposed recently by the authors is developed to predict the damaged behavior of polycrystals under various multiaxial cyclic loading paths. The model is expressed in the time dependent plasticity for a small strain assumption. With the framework of the cont…
Expensive polymer food packaging consisting of multilayer systems of different polymers will be increasingly replaced by cheap homopolymeric materials. Low-pressure plasma deposition of SiOx layers provides a promising alternative to achieve barrier properties on homopolymeric materials directly comparable to those of…
Synthesis of Au/TiO2 Core–Shell Nanoparticles from Titanium Isopropoxide and Thermal Resistance Effect of TiO2 Shell, Kwon, Hyun-Woo, Lim, Young-Min, Tripathy, Suraj Kumar, Kim, Byoung-Gyu, Lee, Min-Sang, Yu, Yeon-Tae
An automatic method for determining the breakdown strength of thin polymer films was evaluated. The equipment consists of a scanning electrode arm with which the breakdown voltage over the film sample is measured. The measurement electrodes were of solid brass and the ground electrode was of thin aluminum foil. Five d…
In the present work, the spectra of currents of thermostimulated depolarization for composite corona electret LDPE + ε vol % TlInSe 2 are obtained by the thermoactivation spectroscopy method [11] and their electret properties and change conditions are investigated.
Natural rubber was reinforced with sisal and oil palm fibers and composites were fabricated based on different fiber loading. Chemically modified fibers, namely, mercerized and silanized fibers, were also used to prepare composites. Biodegradation tests were carried out under soil burial conditions. It was seen that t…
The martensitic transformations in TiNi alloys were studied using molecular dynamics (MD) simulations. The modified embedded atom method was used with the pseudo monoatomic potentials, which included angular dependence of each atoms. The thermally induced B2 → B19′ martensitic and B19′ → B2 reverse martensitic transfo…
Multifunctional nanocontainers can be produced based on partially filled Fe-multi walled carbon nanotubes (MWCNTs). Using thermal decomposition ferrocene filled nanotubes can be grown aligned on substrates. The encapsulated metal nanowires have diameters of 5-30 nm and a length up to few microns. They consist of singl…
The characteristics of field-aged room temperature vulcanized (RTV) silicone rubber coatings were investigated for use in heavily contaminated areas with emphases on the antipollution flashover performance of aged RTV-coated insulators. An atomic absorption spectrophotometer and ion chromatography (IC) were employed t…
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