Materials Literature
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Abstract Summary: Three propylene‐ethylene random copolymers, of varying ethylene content, were fractionated using preparative TREF. The TREF fractions were subsequently analysed offline by CRYSTAF, DSC, 13 C NMR spectroscopy, HT‐GPC, and WAXD. The effect of the ethylene comonomer on the crystallisability of the propy…
In this letter, the authors demonstrate isotropic Fe–Pt exchange-spring nanocomposite permanent magnets with a soft magnetic phase fraction of greater than 0.5 with a coercivity of 6.5kOe, single-phase-like magnetic behavior, and an energy product of 25.1MGOe. Sub-10-nm Fe–Pt clusters are formed with compositions in t…
The cross-section of an InGaAs∕GaAs rolled-up nanotube with an average inner diameter of 18nm and with a large number of windings is prepared by focused ion beam etching and investigated by transmission electron microscopy. This technique provides useful information about the shape and size of the inner as well as out…
A highly disordered pregraphitic carbon nanofiber with the product of its quasi-Fermi wave vector and mean free path close to 1 was fabricated using electrospinning technique. Strong localization made the conductivity vary with temperature as lnσ∝T−1∕2 from 300to5K, suggesting variable range hopping as the conductivit…
A one-dimensional assembly of cadmium sulfide (CdS) nanoparticles was prepared by using functionalized polymers with pendant Fréchet-type dendritic wedges of different generation. The novel dendronized polymers acted as both nanoreactors for the formation of CdS nanoparticles and a template to arrange the nanoparticle…
Rings of perovskite lead zirconium titanate (PZT) with internal diameters down to ∼5nm and ring thicknesses of ∼5–10nm have been fabricated and structurally, crystallographically, and chemically characterized using an analytical transmission electron microscope. Ring fabrication involved conformal solution deposition…
Carbon nanotubes have great potential applications in making ballistic-resistance materials. This letter analyzes the impact of a bullet on nanotubes of different radii in two extreme cases. For a nanotube with one end fixed, the maximum nanotube enduring bullet speed increases and the energy absorption efficiency dec…
Magnetically tunable, high-density arrays of coaxial nanocables within anodic aluminum oxide (AAO) membranes have been synthesized. The nanocables consist of magnetite nanowires surrounded by cobalt nanotube sheaths and cobalt nanowires surrounded by magnetite nanotube sheaths. These materials are a combination of sep…
So far, monostable and bistable liquid crystal display (LCD) modes have independently been researched and developed. The authors propose a tristate LCD that can be operated in memory mode as well as dynamic mode. The proposed device has a unique texture of splay, π twist, and bend states with applied voltages and is o…
Camera-based thermoreflectance microscopy is a unique tool for high spatial resolution thermal imaging of working integrated circuits. However, a calibration is necessary to obtain quantitative temperatures on the complex surface of integrated circuits. The spatial and temperature resolutions reached by thermoreflecta…
The behaviour of the Flack parameter for centrosymmetric and pseudo-centrosymmetric crystal structures based on crystal structures published as being non-centrosymmetric is presented. It is confirmed for centrosymmetric structures that the value obtained for the Flack parameter is critically dependent on the Friedel c…
Polymer surface modification by ions, uncharged particles, and photons of inductively coupled Ar plasma was investigated with a surface force microscope. Optical windows consisting of crystals with different cutoff wavelengths and a metal shield were used to deconvolute the effects of the various plasma species on the…
The frequency dependence of the magnetic energy losses in sintered Mn–Zn ferrites is predicted from the quasistatic regime to the megahertz range. The predicting model is based on the appraisal of the contributions by domain wall (dw) displacements and magnetization rotations and the related relaxation-resonant-type d…
Abstract Summary: This study aims at developing a highly electronic conductive microporous structure from thermoplastic polymers filled with carbon black (CB) and graphite (GR). The matrix was a low viscosity poly(propylene) (PP) and the conductive additives were composed of high specific surface area CB and synthetic…
The dimensionality of a system has a profound influence on its physical behavior, especially for nanostructured materials where at least one of the dimensions is less than 100 nm and, in many instances, the size is comparable with the size of many fundamental physical quantities. Carbon-based nanostructured materials…
A study has been conducted into the dyeing of poly(lactic acid) fibres in supercritical carbon dioxide. The fibres were completely dyed using disperse dyes at 50 °C as shown by fibre cross‐sections, although high colour depths in dark shades still prove challenging. Dye uptake increased significantly at temperatures ≥…
The effect of electrodeposition frequency and waveform on the magnetic properties and microstructures of Co nanowires were investigated. The results show that depending on the value of the electrodeposition frequency appreciable changes in the crystalline anisotropy can be induced. These changes are attributed to modi…
Colloidal dot-, rod-, and tetrapod-shaped CdTe nanocrystals (NCs) are obtained by varying the precursor concentration and the ligands. Both the dot- and rod-shaped NCs are of zinc-blende phase, whereas the tetrapod-shaped NCs are a mixture of zinc-blende and wurtzite structures. It is proposed that the concentration o…
The motion of electrons in c-C 4 F 8 and N 2 gas mixtures for a pulsed Townsend discharge is simulated by the Monte Carlo method. The effective ionization coefficient, , over the E / N range from 160 to 480 Td is calculated by employing a set of cross sections available in the literature. From the variation curve of w…
We investigate the hole trapping process of a neutral oxygen vacancy in amorphous silicon dioxide $(a\text{\ensuremath{-}}\mathrm{Si}{\mathrm{O}}_{2})$ using cluster calculations based on the density functional theory (DFT) method. We show that trapping a hole at a neutral oxygen vacancy leads to the formation of seve…