Materials Literature
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Partial discharges (PD) generate wideband radio frequency interference and, consequently, can be detected using radio receiving equipment. Due to the advances in ultra-high-speed sampling equipment, it is possible to accurately measure the propagation of the PD wavefront as it passes through a 4 element antenna array.…
We show that suitably designed magnetic semiconductor heterostructures consisting of Mn delta (delta)-doped GaAs and p-type AlGaAs layers, in which the locally high concentration of magnetic moments of Mn atoms are controllably overlapped with the two-dimensional hole gas wave function, realized remarkably high ferrom…
We present first-principles density-functional calculations for the electronic properties of nitrogen(N)-doped as well as carbon(C)-doped titanium dioxide (TiO2). We find that the bands originating from N (C) 2p states appear in the band gap of TiO2, but the mixing of N (C) with O2p states is too weak to produce a sig…
Abstract Valence tautomeric complexes combine redox‐active ligands and transition metal ions with two or more accessible oxidation states, exhibiting two nearly degenerated electronic states with localized electronic structures. Charge distribution in such electronic isomers has an appreciable sensitivity to the envir…
Abstract In recent years, research on cylindrical polymer brushes (or molecular bottlebrushes) has received significant attention. In this article, we discuss various strategies for their synthesis and the unique properties arising from their regular multibranched structure. Some recent advances in the application of…
The optical properties of coupled metallic nanorods are studied to investigate the use of coupled plasmonic structures in field-enhanced spectroscopies. Light scattering by coupled nanorods is calculated with the boundary element method, including retardation. The modes of coupled nanorod systems are calculated by the…
Surface-enhanced Raman scattering (SERS) intensities for individual Au nanospheres, nanoshells, and nanosphere and nanoshell dimers coated with nonresonant molecules are measured, where the precise nanoscale geometry of each monomer and dimer is identified through in situ atomic force microscopy. The observed intensit…
Abstract In this work, the effect of ultrasonic irradiation on molecular structure development of metallocene‐catalyzed linear low density polyethylene (mLLDPE) was studied. GPC results show that ultrasonic irradiation have influence on molecular weight and molecular weight distribution of mLLDPE. Molecular weight of…
The effect of water molecules on the conductivity and electrochemical properties of vanadiumpentoxide xerogel was studied in connection with changes of morphology upon thermal annealing atdifferent temperatures. It was demonstrated that the conductivity was increased for the samples heated at150 o C and 270 o C compar…
Abstract Steady‐state electron paramagnetic resonance (EPR) spectroscopy using nitroxide spin probes has been used to investigate the plasticization of poly(vinyl acetate) and poly(ethyl methacrylate) by carbon dioxide. By varying the CO 2 pressure at constant ambient temperature, the glass transition for each polymer…
Local barrier height (LBH) and constant current mode (CCM) images of nonreconstructed (110) single-crystalline titanium dioxide surfaces are determined under ultrahigh vacuum conditions. The barrier height measurements are performed with the tip-oscillation technique in the constant current mode (CCM) of a beetle-type…
Standard applications of density functional theory do not adequately describe the exfoliation energy of graphite. In fact, the local density approximation (LDA) and generalized gradient approximation (GGA) are in qualitative disagreement: the LDA binds at the experimental lattice constant, whereas the GGA does not. Ho…
Concentrated acid solutions have been reported to produce bright light emission during cavitation. Single-bubble sonoluminescence (SBSL) from sulfuric acid (H2SO4) is much brighter than SBSL from water by over three orders of magnitude when both are regassed with Ar. In contrast to water, SBSL spectra of concentrated…
Along the percutaneous part of implantable devices, like (semi-)permanent catheters, epithelial downgrowth can occur. This process can eventually lead to implant loss. Various treatments for the catheter surface have been proposed, to improve their performance. The purpose of the current study was to investigate the e…
The etching characteristics of ZnO thin films, etched with a positive photoresist mask and a process window in inductively coupled CH4–H2–Ar plasmas were investigated by varying the various process parameters. It was found that the process window for ZnO etching is closely related to the balance between the deposition…
A model for the interaction of two bubbles in a sound field [E. A. Zabolotskaya, Sov. Phys. Acoust. 30, 365–368 (1984)] is extended to account for an arbitrary number of bubbles interacting in a cluster. Compressibility of the liquid is taken into account through radiation damping and time delays due to the finite sou…
The three-dimensional (3D) difference Patterson (autocorrelation) function of a disordered quasicrystal (Edagawa phase) has been analyzed. 3D diffuse x-ray diffraction data were collected in situ at 300, 1070, and $1120\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. A method, the punch-and-fill technique, has been developed f…
Abstract We present a numerical scheme for Landau–Lifshitz–Gilbert equation coupled with the equation of elastodynamics. The considered physical model describes the behaviour of ferromagnetic materials when magnetomechanical coupling is taken into account. The time‐discretization is based on the backward Euler method…
The low-frequency sound speed in bubbly liquids is often modeled with an approximate equation [Wood, A Textbook of Sound, 1st ed. (MacMillan, New York, 1930)] that depends primarily on the void fraction. More recent models, developed for use at the individual bubble resonance frequency, predict a small amount of dispe…
The hydrodynamic theory of phasonic and phononic disorder is applied successfully to describe the short-range disordered structure of a decagonal ${\mathrm{Al}}_{71.5}{\mathrm{Co}}_{14.6}{\mathrm{Ni}}_{13.9}$ quasicrystal (Edagawa phase, superstructure type I). Moreover, model calculations demonstrate that the main fe…