Materials Literature
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Low-temperature suppression of nonlinear losses leads to improvement in nanosecond lasing threshold of self-assembled oligophenyl nanofibers by two orders of magnitude. Laser dynamics is revealed by time-resolved photoluminescence excited by femtosecond and nanosecond pulses. Strategies are discussed to extend low-thr…
We investigated the bias polarity dependence of the characteristics of a phase change memory device and found that the device showed higher resistance both at programed and erased states, extended erasing time, and higher threshold voltage (Vth) under negative bias than those under the conventional positive bias. Taki…
Spin-on pure-silica-zeolite or Silicalite films are currently considered as outstanding low-k materials because of their stiffness and ultralow dielectric constant. It is shown that spin-on Silicalite films with low k values unavoidably contain cavities tens of nanometers wide, representing a considerable challenge in…
Abstract In this paper, we report the electrochemical formation of the InP porous nanostructures and their feasibility for the application to the amperometric chemical sensors. Our two step electrochemical process consists of the pore formation on a (001) n‐type InP substrate and the subsequent etching of pore walls c…
This paper demonstrates the effectiveness of polyphosphazene elastomer as compatibilizer on the properties of Nylon 6,6/thermotropic liquid crystalline polymer blends. In situ fibrillation of thermotropic liquid crystalline polymers develops in the shear flow field in presence of thermoplastic matrix. The addition of…
We have measured the dynamic structure factor, $S(Q,E)$, of liquid Se at 523 and 773 K, at the momentum $Q$ and energy $E$ transfer, from 1.9 to $42\text{ }{\text{nm}}^{\ensuremath{-}1}$, and over $\ifmmode\pm\else\textpm\fi{}40\text{ }\text{meV}$, respectively, using a high-resolution inelastic x-ray scattering techn…
The optical characteristics of a silver layer deposited on an antireflection subwavelength-structured surface are investigated. The experimental results of the reflectance and the transmittance of several different thicknesses of silver layer on the subwavelength-structured surface are carried out. A subwavelength str…
Exchange bias is conventionally induced between a ferromagnet and an antiferromagnet where the Curie temperature (TC) considerably exceeds the Neel temperature (TN). Under these circumstances, cooling the bilayer in sufficient field to saturate the ferromagnet is sufficient to induce a finite bias below the blocking t…
Abstract A series of polymer stabilized cholesteric liquid crystal (PSCLC) cells were prepared by photo‐polymerization of a cholesteric liquid crystal (Ch‐LC) mixture containing a nonreactive LC, a nematic diacrylate and a novel cholesteryl monomer. The influence of the specific rotation and concentration of the chira…
Abstract Carbon black nanoparticle grafted with poly( N ‐isopropylacrylamide) (CB‐ g ‐PNIPAAm) was synthesized by surface‐initiated atom transfer radical polymerization (SI‐ATRP). The temperature‐responsive behavior of CB‐ g‐ PNIPAAm was proved by temperature‐variable 1 H NMR. A temperature‐dependent conductive compos…
Nanosized alumina powders have been prepared via reverse micelle and sol-gel processing. By stepwise hydrolysis using aqueous ammonia as the precipitant, hydroxide precursor was obtained from nitrate solutions dispersed in the nanosized aqueous domains of microemulsion consisting of cyclohexane as the oil phase, poly(…
We present a new modeling procedure for magnetic components based on finite-element analysis (FEA). The method can be applied to RM cores. The main advantage of this procedure is that it allows the actual nonlinear component response to be obtained by taking into account the core saturation effect from only a 2-D simu…
The microstructure evolution during a liquid-liquid phase transformation was calculated. The effect of convections on the microstructure development was investigated. The results demonstrate that the convective flow against the solidification direction causes an increase in the local nucleation rate. Convections lead…
The linewidth of the plasmon absorption of a gold nanoshell was theoretically studied by using a Drude model and quasistatic approximation. Increasing the dielectric constant of the core or surrounding can broaden the absorption peak linearly. A mechanism based on the polarization direction of the local electric field…
Hydrogen atmosphere can significantly change the tribological behavior at diamond and diamondlike carbon (DLC) surfaces and the friction-reducing effect depends on the partial pressure of hydrogen. We combined density functional theory modeling and thermodynamic quantities to predict the equilibrium partial pressures…
The nickel self-diffusion coefficient in Si–Ni melts was measured for compositions up to 20at.% Ni in a temperature range from 270K below to 200K above the liquidus temperature by using quasielastic neutron scattering in combination with electromagnetic levitation. Ni self-diffusion coefficients are in the order of 10…
We present a thermodynamic model that quantifies the magnetization and magnetostriction of annealed or unannealed Galfenol alloys subjected to magnetic fields and mechanical stresses. The model requires a small number of parameters directly related to physical properties of the data, thus providing a useful tool for m…
We report on a field-effect light emitting device based on silicon nanocrystals in silicon oxide deposited by plasma-enhanced chemical vapor deposition. The device shows high power efficiency and long lifetime. The power efficiency is enhanced up to ∼0.1% by the presence of a silicon nitride control layer. The leakage…
ZnCoO:H nanocrystals are weak ferromagnetic at room temperature with a small coercivity and a small remanence, whereas ZnCoO nanocrystals are paramagnetic. The thermal irreversibility of zero-field cooling and field cooling magnetizations of ZnCoO:H nanocrystals corresponds to the existence of superparamagnetism due t…
We have fabricated epitaxial Sr2TiO4 thin films on SrTiO3 (100) single crystal substrates by pulsed laser deposition. We demonstrate that growth parameters including substrate temperature, oxygen pressure, as well as the laser fluence have to be chosen precisely to obtain stoichiometric well-ordered films of this comp…