Materials Literature
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A study of single injection space-charge-limited current flow in insulator with two sets of traps distributed in energy is presented for a particular situation in which the energy separation of the two sets of traps is too small to give rise a current-voltage characteristic with maximum structure. The current-voltage…
The present paper reports on the fabrication of In2O3 layers by oxidation of InN thin films deposited on n-type silicon substrate by magnetron reactive sputtering. The subsequent solar cells using the resulting In2O3/Si heterojunctions exhibit an ideality factor, deduced from current-voltage (I – V) characteristics of…
1-Phenyl-3-p-fluorophenyl-5-p-chlorophenyl-2-pyrazoline has been synthesized and characterized by elemental analysis, IR, UV-Vis and X-ray single crystal diffraction. Density functional calculations show that B3LYP/6-311G** method can reproduce the structural parameters. The electronic absorption spectra have been pre…
Abstract Theophylline was encapsulated in polyurethane prepared with hexamethylene diisocyanate (HMDI), polycaprolactone (PCL) ( M W = 530 and 2000 g/mol) diols, and starch as polyols and butanediol as chain extender. Polyurethane microspheres were prepared in two reactors; after polyurethane preparation by mixing PCL…
The slow secondary (beta) process of 1,1'-bis (4-methoxyphenyl) cyclohexane and phenolphthalein dimethylether has been investigated by dielectric spectroscopy. New experimental results about the pressure dependence of the two processes are reported, as well as new data about the dependence of the characteristic relaxa…
Abstract In this work, the influence of polyaniline (PAni) doped with both camphorsulfonic acid (PAni‐CSA) and dodecylbenzenesulfonic acid (PAni‐DBSA) on polyurethane (PU)/PAni blends was studied by rheological and morphological analyses. The effect of doped polyaniline on the attenuation of incident microwave radiati…
The orientational dynamics of thermotropic liquid crystals across the isotropic-nematic phase transition have traditionally been investigated at long times or low frequencies using frequency domain measurements. The situation has now changed significantly with the recent report of a series of interesting transient opt…
The authors report the fundamentals and technology of the linear light down-conversion process, which is based on the possibility of enhancing thermal emission of semiconductors in the spectral range of intraband electron transitions (midinfrared and long-wave infrared) by the shorter wavelength interband excitation.…
Abstract H 3 PO 4 doped polyaniline was synthesized by a single‐step chemical polymerization method using ammonium persulfate as an oxidizing agent. The material characterization was done by SEM, UV–vis spectroscopy and thermogravimetric analysis (TGA). The pellets of the synthesized material were used to study the el…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTHelix Induction in Poly(phenylacetylene)s Bearing Achiral Oligoglycine Pendants by Chiral Oligopeptides in WaterKatsuhiro Maeda, Hitoshi Tsukui, Yasuaki Matsushita, and Eiji YashimaView Author Information Department of Molecular Design and Engineering, Graduate School of Engine…
Abstract Both viscoelastic behavior and plastic deformation in compression were investigated on new polythiourethane networks based on diisocyanates and tri‐ or tetra‐thiols. Dynamic mechanical analysis was used to characterize the mechanically‐active α and β relaxations as a function of crosslink density and nature o…
Atom transfer radical polymerization (ATRP) has been used to prepare a core–shell hybrid nanostructure successfully: a hard core of single-crystalline lanthanum hydroxide nanowires and a soft shell of polystyrene (PS) brushes. Transmission electron microscopy (TEM) images indicated that the resulting products presente…
Clear imaging for stable phases of encapsulated fullerenes has been easily obtained only in double-wall carbon nanotubes (DWNTs) and triple-wall carbon nanotubes (TWNTs) due to the high structural stability of the host nanotubes and the encapsulated fullerenes, suggesting that investigation on DWNT- or TWNT-peapods mi…
We have studied the optical properties of silicon quantum dots (QDs) embedded in a silicon oxide matrix using photoluminescence (PL) and time-resolved PL. A broad luminescence band is observed in the red region, in which the time evolution exhibits a stretched exponential decay. With increasing excitation intensity a…
This article experimentally investigates the thermal performance of thermoelectric air-cooling module which comprises a thermoelectric cooler (TEC) and an air-cooling heat sink. The influences of input current and heat load are determined. And performances under each situation are quantified by thermal resistance anal…
In this paper, we discuss nanotube diameter selectivity in DNA wrapping of single-walled carbon nanotubes (SWNTs) under high-shear sonication and present Raman evidence for the selective wrapping. The DNA wrapping induces an upshift (an increase in wavenumber) of the radial breathing mode (RBM) bands in the Raman spec…
Response to "Will Dialysis Prevent the Development of Nephrogenic Systemic Fibrosis After Gadolinium-Based Contrast Administration?"Dale R. Broome, Alfred C. Cottrell1 and Emanuel Kanal2Audio Available | Share
ZnS nanostructures of different morphologies, i.e., nanowires and nanobelts, have been ion implanted with Mn and subsequently annealed to obtain ${\mathrm{Zn}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{S}$ nanostructures. The Mn content $x$ was adjusted to lie in the range from $4\ifmmode\times\else\texttimes\fi{}{10…
We introduce an approach towards the design of metamaterials where the dielectric and magnetic activity is caused by resonances in dielectric nanocavities embedded in metal. The simplest implementation of this concept is a rectangular nanoaperture in a thin metallic stripe. We show that the electromagnetic field of th…
Abstract A water‐dispersible conducting polyaniline/ nano‐SiO 2 composite, with a conductivity of 0.071 S cm −1 at 25°C, was prepared by the oxidative polymerization of aniline in the presence of amorphous nano‐SiO 2 particles. And the structure, morphology, thermal stability, conductivity, and electroactivity of this…