Materials Literature
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The frequency dependence of the dielectric loss angle for a metal-insulator composite was shown previously to be an efficient method to experimentally determine the percolation threshold. The statistical properties of this angle are found here to be similar to those of the critical links (supporting the total current)…
The processes of charge accumulation in the MOS structures with SiO 2 films containing Si nanocrystals are investigated, depending on the conditions of their formation by pulsed laser deposition. High-frequency capacity-voltage characteristics of structures with the different thicknesses of films, sizes of Si nanocrys…
The diamine reagent 1,2-bis(2-aminophenylthio)ethane is no longer commercially available but is still required for the synthesis of the bismaleimide resin, APO-BMI, used in syntactic foams. In this work, we examined the hydrolysis of benzothiazole followed by reaction with dichloroethane or dibromoethane. The deproton…
Abstract A novel mononuclear zinc(II) complex [ZnL(DMSO)] (1) with chelating bisoxime ligand 4,4′‐dinitro‐2,2′‐[ethylenedioxybis(nitrilomethylidyne)]diphenol (H 2 L) was synthesized and structurally characterized by X‐ray crystallography. The complex crystallizes in the triclinic system, space group P‐1, with unit cel…
The present work is aimed at studying the impact of high-speed draw frame and its preparatory on fibre orientation parameters (evaluated using Lindsley technique) of cotton sliver. The process variables chosen are card draft, coil diameter of card and delivery speed of breaker draw frame. A three-variable factorial de…
Charged, nonwetting colloids with a contact angle theta=180 degrees are attracted to an oil-water interface due to image charge forces. Near the interface, the attractive image charge forces are balanced by repulsive van der Waals forces, and thus the colloids are trapped at a finite distance from the interface. Elect…
The contrast-to-gradient (CG) resolution has been defined as a weighted harmonic mean of the local resolution, i.e. the length defining the object's local fine structure at each pixel position. The newly defined resolution Res is defined as 2 sigma/ sqrt 2, where 2 sigma is a sharpness factor of the image pattern obta…
A novel series of amphiphilic polyphosphazenes (PNIPAm/AA-PPP) containing hydrophilic oligo-( N -isopropylacrylamide) (oligo-NIPAm) and various hydrophobic aliphatic amines as co-substitutes was synthesized via a two-step substitution reaction. The extraction and solubilization of water-soluble substances such as fluo…
The angular dependence of the spin-flop transition in ${\mathrm{Gd}}_{5}{\mathrm{Ge}}_{4}$ has been examined by magnetization measurements of a single crystal. When the magnetic field vector is tilted away from the antiferromagnetic easy axis ($c$ axis) toward the $b$ axis, the spin-flop transition always remains firs…
ZnO/Mg 0.2 Zn 0.8 O multiple quantum wells (MQWs) were grown on a c -plane sapphire (Al 2 O 3 ) substrate by plasma-assisted molecular beam epitaxy. Both the spontaneous and the stimulated emission properties at room temperature (RT) in MQWs were studied under lower and higher excitation densities. The strong emission…
The polymer reference interaction site model theory is used to investigate phase separation in star polymer nanocomposite melts. Two kinds of spinodal curves were obtained: classic fluid phase boundary for relatively low nanoparticle-monomer attraction strength and network phase boundary for relatively high nanopartic…
The morphology of human hair was extensively discussed in the last century, except for hair medulla, mainly because it was believed to have little or no influence on any useful hair property. Early SEM results showed that medulla is formed by unorganized fibrilar material that could be macrofibrils randomly located in…
Abstract Several ZnO nanoarchitectures have been selectively prepared through hydrothermal method including urchin‐shaped, flower‐shaped, butterfly‐shaped, and cacti‐shaped microstructures. The influence of reaction temperature and the concentration of amphiphilic copolymer on the morphologies and shapes of ZnO sample…
High Resolution Image Download MS PowerPoint Slide The N 2 adsorption occurring at temperatures around room temperature is a particularly surprising phenomenon given by the copper ion-exchanged MFI-type zeolite (CuMFI). However, the assignment of the active sites for N 2 adsorption on CuMFI at room temperature is cont…
Abstract Multiwall CN x nanotubes have been grown in the result of acetonitrile decomposition over Fe catalyst (CVD method). The random nanotubes samples have been produced by classical technique using catalyst nanoparticles formed by iron bimaleate thermolysis. The aligned nanotubes have been synthesized by aerosol a…
Abstract The optical properties of single‐wall carbon nanotube sheets in the far‐infrared have been investigated with THz time‐domain spectroscopy. Over a wide frequency range from 1 THz to 40 THz, the complex dielectric function of the nanotube sample has been derived. Our data can be excellently reproduced by a Drud…
This paper describes a new method for yarn hairiness evaluation that calculates the hair densities at varying distances from the yarn core using an image processing technique. The method is based on integrating the number of pixels for distances incremented by a pixel size from the yarn core edge. The experiments with…
Electron transfer (ET) reactions from the S(1) and S(2) states of some porphyrins and phthalocyanines to the axial ligand have been investigated by means of femtosecond laser flash photolysis. As the axial ligand, which acts as an acceptor, we synthesized an asymmetric pyromellitic diimide (PI) compound that has an al…
ZrO2 : Pr films were synthesized by the ultrasonic spray pyrolysis process. X-ray diffraction studies, as a function of the deposition temperature, indicate a tetragonal crystal structure of zirconia as the substrate temperature was increased. Luminescence (photo- and cathodoluminescence) properties of the films were…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStable Aqueous Dispersion of Conducting Polyaniline with High Electrical ConductivityJing Luo, Hongming Zhang, Xianhong Wang, Ji Li, and Fosong WangView Author Information State Key Laboratory of Polymer Physics and Chemistry, Chang…