Materials Literature
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Silicon carbide fiber (Hi‐Nicalon Type S, Nippon Carbon) reinforced silicon carbide matrix composites containing melt‐infiltrated silicon were subjected to creep at 1315°C at three different stress conditions. For the specimens that did not rupture after 100 h of tensile creep, fast‐fracture experiments were performed…
The atomic structure of epitaxial ${\mathrm{BaTiO}}_{3}$ films grown on ${\mathrm{SrRuO}}_{3}$-covered (001)${\mathrm{SrTiO}}_{3}$ substrates by pulsed laser deposition has been studied by transmission electron microscopy. It revealed a three-layered structure, each layer with a different morphology, remaining strain,…
Abstract Thermal stability of polypropylene and carbon nanofibre composite system has been studied using Thermogravimetric Analysis, Limited Oxygen Index (LOI), Flammability, Calorimetry, and Oxidation Induction Time techniques. Definite improvement in thermo‐oxidative stability of the composite system has been observ…
ZnO nanotower bundles have been grown on the electrochemically deposited ZnO thin film by a simple hydrothermal process. The influence of surface/interface defects on the structural and optical properties is studied by x-ray diffraction, selected area electron diffraction, and photoluminescence techniques. The formati…
Abstract The effects of additives with different functional groups, that is, hydroxyl and carboxyl groups, on the physical properties of starch/PVA blend films were examined. Starch/PVA blend films were prepared by the mixing process. Glycerol (GL) with 3 hydroxyl groups, succinic acid (SA) with 2 carboxyl groups, mal…
In single-bubble sonoluminescence (SBSL) microbubbles are trapped in a standing sound wave, typically in water or water-glycerol mixtures. However, in viscous liquids such as glycol, methylformamide, or sulphuric acid it is not possible to trap the bubble in a stable position. This is very peculiar as larger viscosity…
The characterization of a commercial Ni–Mn–Ga alloy for use as a deformation sensor is addressed. The experimental determination of flux density as a function of strain loading and unloading at various fixed magnetic fields gives the bias field needed for maximum recoverable flux density change. This bias field is sho…
The silk gland of Bombyx mori is an organ specialized for the synthesis and secretion of silk proteins. We report here the resolution of silk gland proteins by 2-DE and the identification of many of those proteins. This was accomplished by dissecting the glands into several sections, with each exhibiting more than 400…
Recently, electrical bistability was demonstrated in polymer thin films incorporated with metal nanoparticles [J. Ouyang, C. W. Chu, C. R. Szmanda, L. P. Ma, and Y. Yang, Nat. Mater. 3, 918 (2004)]. In this letter, we show the evidence that electrons are the dominant charge carriers in these bistable devices. Direct i…
A comprehensive proteomic study was carried out to identify and characterize proteins expressed by Bifidobacterium longum NCC2705. A total of 708 spots representing 369 protein entries were identified by MALDI-TOF-MS and/or ESI-MS/MS. Isoelectric point values estimated by gel electrophoresis matched closely with their…
Innocence lost: The IR spectra of Au/CO complexes adsorbed on of a MgO(001) film differ from the corresponding neutral Au clusters. Calculations indicate this shift of 200–250 cm−1 can be associated with a negative charge on the Au/CO complex. For Au/CO complexes on so-called color centers a charge transfer is expecte…
Carbon nanotubes (CNT) nanocomposites used for thin-film transistors (TFTs) provide one of the first technologically-relevant test beds for two-dimensional heterogeneous percolating systems. The characteristics of these TFTs are predicted by considering the physics of heterogeneous finite-sized networks and interfacia…
Easy does it: Easily handled and environmentally safe oxone generates singlet oxygen which effects the simple and selective oxidative de-aromatization of para-alkyl phenols 1 into para-peroxyquinols 2 under very mild conditions with good to excellent yields. A one-pot access to para-quinols 3 from 1 is also possible a…
Abstract Changes in solubility and molecular properties of protein films obtained from soy protein isolate (SPI) solutions at different pH values (2, 8 and 11) were investigated to study protein behavior during film formation. Proteins retained their native conformation in films at pH 8, but were partially or extensiv…
We report an experimental method that clearly determines the sensing mechanism of carbon-nanotube field effect transistors. The nanotube/electrode contacts are covered with a thick and long passivation layer that hinders their exposure to chemicals in a controlled fashion, leaving only the midsection of the nanotube e…
By means of combined ab initio and semiempirical simulations, the charge transmission properties of potassium- and nitrogen-doped nanotubes are compared. The backscattering efficiency of adsorbed potassium is shown to be much weaker, owing to a shallower impurity potential well that weakly traps the induced quasibound…
The principal obstacle to long-time operation of silicon detectors at the highest energies in the next generation of experiments arises from bulk displacement damage which causes significant degradation of their macroscopic properties. The analysis of the behaviour of silicon detectors after irradiation conduces to a…
Strong anomalies of the thermal expansion coefficients at the magnetic and ferroelectric transitions have been detected in multiferroic $R{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$. Their correlation with anomalies of the specific heat and the dielectric constant is discussed. The results provide evidence for the magnetic ori…
High-strain piezoelectric materials are often ceramics with a complicated constitution. In particular, PZT is used with compositions near to a so-called morphotropic phase boundary, where not only different variants of the same phase (domains), but different phases may coexist. Micro-mechanical models for ferroelectri…
The {\em around-mean-field} LSDA+U correlated band theory is applied to investigate the electronic and magnetic structure of $fcc$-Pu-Am alloys. Despite a lattice expansion caused by the Am atoms, neither tendency to 5$f$ localization nor formation of local magnetic moments on Pu atoms in Pu-Am alloys are found. The $…