Materials Literature
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A method for transformer design with an asymmetric winding configuration to reduce the inrush current with appropriate voltage regulation and short-circuit current is proposed. Differing from the traditional symmetric winding structure in transformer design, this method can provide the high inrush equivalent inductanc…
The synthesis of heteroepitaxial monocrystalline diamond films has been of technological and scientific interest for several decades. Using chemical vapor deposition techniques, polycrystalline diamond has been successfully grown on many substrates. However, iridium emerges in providing highly oriented films, signific…
Perovskite-like oxides La 2 CuO 4 and LaSrCuO 4, prepared by the citrate combustion method, were studied and used as catalysts for CO oxidation, NO decomposition, and NO + CO reduction. The adsorption and desorption behaviors of the gases on catalyst surfaces were well characterized by mass spectrometric−temperature p…
A newly engineered host−guest hydrogen-bonded 2-amino-5-nitropyridinium tetrafluoroborate (2A5NPFB) salt has been designed following a strategy applied to the 2-amino-5-nitropyridinium salts. The crystal structure of organic−inorganic 2A5NPFB has been determined, and it belongs to the noncentrosymmetric space group Fd…
In 2.2% Si electrical steel, the magnetic hysteresis behavior is sharply sheared by a rather small plastic deformation (0.5%). A modification to the Jiles–Atherton hysteresis model makes it possible to model magnetic effects of plastic deformation. In this paper, with this model, it is shown how a narrow hysteresis wi…
Barium titanate (BaTiO 3 ) particles with book‐like and spherical morphology were prepared by using a hydrothermal soft chemical process in the presence of a cationic surfactant. A layered titanate of H 1.07 Ti 1.73 O 4 with a lepidocrocite‐like structure and plate‐like particle morphology was used as the precursor. T…
Nanocrystalline ZnO ceramics with grain sizes of ∼100 nm were prepared by pressureless sintering at 800°C for 2 h and spark plasma sintering (SPS) at 550°C for 2 min, respectively. Excellent green emission properties were obtained in the ZnO ceramic prepared by the SPS process and in the pressureless‐sintered ZnO cera…
Upconversion luminescence characteristics of a multi-rare-earth-doped 0.05K2O–0.1ZnO–0.1BaO–0.2PbO–0.2GeO2–0.35TeO2 glass have been investigated under 976 nm excitation for potential use in full colour displays. Two luminescence ions, Er3+ and Tm3+, were used as blue, green and red emitters to control the colour of th…
Nanometer-sized ferrite magnetic materials are the subject of intense research interest due to their potential applications in high-density magnetic information storage. One of the most explored ferrite materials is the cobalt ferrite (CoFe2O4). We have synthesized cobalt ferrite nanowires using cobalt ferrite nanopar…
As a result of hundreds of millions of years of evolution, orb-web-weaving spiders have developed the use of seven different silks produced by different abdominal glands for various functions. Tubuliform silk (eggcase silk) is unique among these spider silks due to its high serine and very low glycine content. In addi…
A new photocage is proposed, based on ketoprofen-derived compounds and mediated by carbanions. The new photocage has significant advantages over the widely used o-nitrobenzyl derivatives, including aqueous compatibility, faster photorelease, higher quantum yield, and innocuous byproducts. The photorelease of ibuprofen…
Nickel(II), palladium(II), and platinum(II) complexes of meso-aryl-substituted [26]hexaphyrin have been prepared and structurally characterized. In mono-metalated complexes, the metal ion is commonly bound with three pyrrolic nitrogen atoms and one pyrrolic beta-carbon, whereas a bis-Pd(II) complex exhibits a unique s…
We study the surface plasmons (SPs) that exist at the interface between air and a metamaterial constructed of split ring resonators (SRRs). The SRR metamaterial possesses a frequency band in the microwave regime $(12.5--14\phantom{\rule{0.3em}{0ex}}\mathrm{GHz})$ over which the permeability is negative. We apply an at…
A quartz crystal microbalance with dissipation monitoring (QCM-D) was used to assess the physical properties of interpenetrating polymer networks (IPNs) through swelling experiments in ambient humidity and in phosphate-buffered saline (PBS), pH 7.4. The IPNs, based on acrylamide (AAm) and poly(ethylene glycol) (pEG),…
Understanding the effect of Mn substitution for Fe in Co ferrite presents a challenge because there are three different transition-metal ions distributed among two distinct crystallographic and magnetic sublattices with complicated superexchange and anisotropic interactions. In this study, a series of six powder sampl…
Studies have shown that poly(lactic-co-glycolic acid) (PLGA) films with nanometer surface features promote vascular endothelial and smooth muscle cell adhesion. The objective of this in vitro research was to begin to understand the mechanisms behind this observed increase in vascular cell adhesion. Results provided ev…
Current trends in the miniaturization of microwave devices have prompted considerable interest in studying electromagnetic transport in nanoscale systems. Understanding the effect of physical structure and the role of interfaces is critical for gaining insight into the electromagnetic and magnetic properties of nanost…
Wasp-waist and pot-belly hysteresis loops have been observed in many materials. When only the major loop is reported, the results are insufficient to establish which processes are involved. We present two models for wasp-waist materials that produce virtually indistinguishable major loops, but show that first-order re…
The fundamental optical properties of Ga-doped ZnO films grown by metalorganic chemical vapor deposition were investigated by room-temperature transmittance and photoluminescence (PL) spectroscopy. The Burstein–Moss (BM) shift of the absorption edge energy is observed at the carrier concentration up to 2.47×1019cm−3.…
We present a quantitative study of the thickness dependence of the polarization and piezoelectric properties in epitaxial (001) PbZr0.52Ti0.48O3 films grown on (001) SrRuO3-buffered (001) SrTiO3 substrates. High-resolution transmission electron microscopy reveals that even the thinnest films (∼8nm) are fully relaxed w…