Materials Literature
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We synthesized a low band gap, solution processable oligothiophene derivative functionalized with a diketopyrrolopyrrole core, which is a highly absorbing chromophoric group. This design leads to optical absorption that extends to 720 nm in solution and to 820 nm in the film. Cyclic voltammetry shows quasireversible o…
Viability, cell cycle effects, genotoxicity, reactive oxygen species production, and mutagenicity of C(60) fullerenes (C(60)) and single-walled carbon nanotubes (SWCNT) were assessed in the FE1-Mutatrade markMouse lung epithelial cell line. None of these particles induced cell death within 24 hr at doses between 0 and…
This letter reports normally-off operation of an AlGaN/GaN recessed MIS-gate heterostructure field-effect transistor with a high threshold voltage. The GaN-based recessed MIS-gate structure in conjunction with negative polarization charges under the gate allows us to achieve the high threshold voltage, whereas the low…
Amyloid refers to the abnormal fibrous, extracellular, proteinaceous deposits found in organs and tissues. Amyloid is insoluble and is structurally dominated by beta-sheet structure. Unlike other fibrous proteins it does not commonly have a structural, supportive or motility role but is associated with the pathology s…
Beams of electrons and ions are now fairly routinely focused to dimensions in the nanometer range. Since the beams can be used to locally alter material at the point where they are incident on a surface, they represent direct nanofabrication tools. The authors will focus here on direct fabrication rather than lithogra…
Alkannin and shikonin (A/S) are potent pharmaceutical substances with a wide spectrum of biological activity like wound healing, antimicrobial, anti-inflammatory and anticancer [1,2]. A/S comprise the active ingredients of pharmaceutical preparations in several forms, such as powder form (A/S or a mixture of isohexeny…
Using a combination of atomic-resolution high-angle annular dark-field (HAADF) Z-contrast imaging and ab initio calculations, atomic models of clusters 2 nm in diameter and 0.8 nm in height are proposed for the Al–Co–Ni pentagonal quasicrystal. This quasicrystal has 5-fold symmetry (the so-called 5f state) without sup…
This work has derived the dielectric tensor of a carbon nanotube media using a microscopic model of interaction between the lattice of the nanotube and the electromagnetic field. Since the derivation is achieved within the linear oscillator formalism, a direct quantization procedure for the above formulation is straig…
Abstract The foam index test can be useful for predicting air-entraining admixture (AEA) dosage in concrete or for evaluating AEA interaction with other mixture ingredients. The test is sensitive to several factors including container type and fullness, volume of materials, agitation, pipette precision, and others. Th…
The problem of analytical description of the space-time nucleation of the crystal phase is solved using the theory of nonuniform and nonstationary fluctuations of density and temperature and the method of deterministic chaos.
A simple model, which reflects the main features of the phase equilibria between austenite, ferrite, and cementite, is proposed to study the growth kinetics of pearlite-type eutectoid colonies. The previously developed microscopic theory of diffusional phase transformations in alloys developed earlier is used to simul…
Catalysis of cure reaction between N‐methylaniline‐blocked polyisocyanate and hydroxyl‐terminated polybutadiene was investigated using a variety of tertiary amine and organotin catalysts. The catalytic activity of amine and organotin compounds was determined from the cure‐time results. It was found that the activity o…
A twin type thermal conduction calorimeter has been specially designed and constructed for absolute measurement of tritium, and then its performance was examined using two kinds of tritium samples, i.e., ZrNi alloy powders loaded with a given amount of tritium. Total amounts of tritium in the ZrNi alloy powders were p…
The left-handed metamaterials have the negative permittivity epsiv and permeability mu simultaneously. These provide the left-handed metamaterials with various new properties in comparison with the traditional right-handed (RH) materials. Many applications for the left-handed metamaterials are possible. A new type of…
This work investigates on the interplay between the Jahn-Teller effect and spin state in Co 2+ (3d 7 configuration). High-pressure optical absorption experiments were carried out in the 0 - 50 GPa range in CoCl 2. This system is attractive since pressure increases the crystal-field splitting between e g and t 2g level…
Carbon nanotubes (CNTs) deposited by electrophoresis on a free-standing thin metal film edge are demonstrated. These CNTs act as electron field emitter which was integrated on the cathode of the field-emission vacuum diode. This diode exhibits a low reverse leakage current (-11) with high on-off ratio of 106. Owing to…
The formation of radiation defect clusters as interstitial dislocation loops in pyrographite irradiated by 20-MeV carbon ions in a cyclotron has been studied by means of synchrotron radiation scattering. The experimental data are interpreted in terms of the Krivoglaz model and the model of deformation domain formation…
For ten years French Tritium laboratories have been using metal hydride storage beds with LaNi4Mn for process gas (HDT mixture) absorption, desorption and for both short and long term storage. This material has been chosen because of its low equilibrium pressure and of its ability to retain decay helium 3 in its latti…
Large blast furnace Electric furnace Fluid gas recovery Continuous casting Coal power injection Top
Ultravoilet (UV) photodetectors have been fabricated by rf magnetron sputtered ZnO films. The average grain size of ZnO films were 15-20 nm. Photo-response (Ion/Ioff) of as-grown ZnO film of thickness 100 nm was maximum (3.8 times 103) having relatively small response time ~90 ms for UV intensity of 140 muW/cm2(lambda…