Materials Literature
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This paper concerns the study of zirconium oxidation under irradiation with high energetic Xe ions. The irradiations were performed on the IRRadiation SUD (IRRSUD) beam line at Grand Accélérateur National d’Ions Lourds of Caen. The oxygen partial pressure was fixed at 10−3Pa and two temperature conditions were used, e…
The structural stability of carbon nanotori have been investigated by performing molecular‐dynamics simulations. The systems considered are C170, C250, C360, C520 and C750 tori, which have been constructed using a recently developed algorithm based on the idea of Fonseca et al. Calculations, have been realized by usin…
We studied the thermoelectric properties of InSb and Ga0.03In0.97Sb thin films grown by metalorganic vapor-phase epitaxy targeting a thermoelectric device with a high electron mobility. For InSb on sapphire, the maximum power factor (Pf) was 3.5×10−3W∕mK at 723K, and for InSb on SiO2 glass, the maximum Pf was 2.4×10−3…
A specific ac nanocalorimeter is presented for the study of kinetics in phase transitions. This apparatus designed by means of microfabrication technologies requires a 50-μm-thick solid or liquid sample. The use of the ac calorimetric method allows an operating frequency range around two decades combined with a very h…
A numerical study of microdomain coalescence induced by the soft-confined crystallization of lamellar diblock copolymers has been reported. It was found that under high temperatures those crystallites showing their orientational preferences perpendicular to the lamellar microdomains are responsible for the occurrence…
The Pt nanocrystals as nanonetwork conductors improved electrochromic properties of TiO2 such as increased optical modulation and fast response time, compared to pure TiO2 as well as TiO2 incorporated by amorphous Pt nanophases. It is likely that an enhancement of cathodic electrochromism in TiO2-Pt is due to an impro…
The HIPS-montmorillonite nanocomposites are prepared by the static melt intercalation method. XRD analysis indicates that the spacing of the silicate layers increased from 1.51 nm for the untreated montmorillonite to 3.44 nm for the HIPS-montmorillonite prepared by the melt intercalation method. The cone calorimeter t…
The magneto-Seebeck coefficient and magnetoresistivity of a polycrystalline bismuth microwire array were measured under magnetic fields of 0–2T and at temperatures of 50–300K. To avoid the influence of contact resistance between the wire array and the electrodes, bulk bismuth was used for the electrodes. In the absenc…
Abstract Ethylene vinyl alcohol (EVOH)–based packaging structures were analyzed in terms of both barrier properties and morphological alterations after a retorting process and as functions of ethylene content. From the results, it was found that the samples do have a substantial decrease in oxygen barrier properties a…
Two groups of cobalt nanoparticles with spherical and disk shape were used to grow carbon single-walled nanotubes by chemical vapor deposition. To elucidate the synthesis conditions and for comparison purpose, a third group of cobalt catalyst prepared by common wet chemistry was used. After the synthesis, electron-mic…
Indium tin oxide (ITO) films deposited with single layers of monodispersive fluorine-doped tin oxide (FTO) nanoparticles of several nanometers in size were grown on glass substrates by intermittent spray pyrolysis deposition using conventional atomizers. These films have significantly higher ionization potentials than…
Use of anodic bias improves the charge-injection limits of activated iridium oxide (AIROF) microelectrodes. Asymmetric waveforms, in which the charge balancing anodic phase is delivered at a lower current density and longer pulse width, has been found to allow for higher values of anodic bias voltages, thus maximizing…
Using nanoporous media as templates for electrodeposition, we have fabricated multilayered Pb∕Cu nanowires 50nm in diameter and 20μm long with Cu layer thicknesses as low as 10nm. This was achieved by using a single-bath technique and a precise selection of the copper deposition potential to limit the redissolution of…
Abstract Summary: A new siloxane colloid was developed, for the use in UV‐curable inorganic‐organic hybrid films. The UV‐crosslinkable silica‐colloids were prepared from vinyltrimethoxysilane (VTMS) via a sol‐gel method. The structure of silica‐colloids was characterized using 1 H NMR, 29 Si NMR, FT‐IR, and matrix‐ass…
Fuel cells offer potentially attractive alternative backup power solutions for telecom applications. In order to intelligently assess different fuel-cell alternatives, one needs to understand the major types of fuel cells and their current state of development. Recent major developments in polymer-electrolyte membrane…
Abstract Summary: Polyaniline‐dodecybenzenesulfonic acid (PANI‐DBSA)/epoxy resin (EP) blends were prepared by a solution‐in‐toluene process and direct mixing of PANI‐DBSA with EP. The dispersion quality of PANI‐DBSA proved to be strongly related to the final electrical properties of the cured blends. The solution proc…
Brominated epoxy resins cured with diaminodiphenyl sulfone are thermally less stable than nonbrominated analogs. This thermal instability is likely to be caused by the formation of hydrogen bromide which destabilizes the epoxy network. As a result of the reaction of HBr with the epoxy resin, bromine-containing aromati…
Abstract Summary: Energy‐filtering transmission electron microscopy (EFTEM) was employed for the analysis of polymer‐polymer interfaces. To attain imaging and spectral analyses with a spatial resolution of 10 nm, problems arising in the EFTEM analysis for polymer specimens were investigated. Interfaces in poly(methyl…
Abstract Blends of poly(butylene terephthalate) (PBT) with 30 wt % acrylonitrile–ethylene–propylene–diene–styrene (AES) were prepared with methyl methacrylate (MMA)/glycidyl methacrylate (GMA)/ethyl acrylate (EA) terpolymers (MGEs) as compatibilizing agents. These acrylic terpolymers were miscible with the styrene–acr…
In this work the piezoresponse mode of the atomic force microscope has been applied for piezoelectric coefficient measurements in nanometer scale in high conductive RbTiOPO4 and KTiOPO4 ferroelectric crystals with specifically tailored domain configurations. A strong dependence of the amplitude and phase contrast betw…