Materials Literature
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We use spatially resolved micro-PL imaging at low temperature to study optical properties of two sets of CdS nanowires grown using 20 nm and 50 nm catalysts. We find that low temperature PL of single nanowires is an ideal technique to gauge the quality of a given growth run, and moreover enables the collection of deta…
The problem of the physicochemical synthesis of diamond spans more than 200 years, involving many giants of science. Many technologies have been discovered, realized and used to resolve this diamond problem. Here the origin, definition and cause of the diamond problem are presented. The Resolution of the diamond probl…
We calculate the P-shell--to-S-shell decay lifetime τ(P->S) of electrons in lens-shaped self-assembled (In,Ga)As/GaAs dots due to Auger electron-hole scattering within an atomistic pseudopotential-based approach. We find that this relaxation mechanism leads to fast decay of τ(P->S)~1-7 ps for dots of different sizes.…
We find that nearly monodisperse copper oxide nanoparticles prepared via the thermal decomposition of a Cu(I) precursor exhibit exceptional activity toward CO oxidation in CO/O2/N2 mixtures. Greater than 99.5% conversion of CO to CO2 could be achieved at temperatures less than 250 degrees C for over 12 h. In addition,…
The development of printed and flexible (opto)electronics requires specific materials for the device's electrodes. Those materials must satisfy a combination of properties. They must be electrically conducting, transparent, printable, and flexible. The conducting polymer poly(3,4-ethylenedioxythiophene)− poly(styrenes…
Within a tight-binding approach we investigate how the electronic structure evolves from a single graphene layer into bulk graphite by computing the band structure of one, two, and three layers of graphene. It is well known that a single graphene layer is a zero-gap semiconductor with a linear Dirac-like spectrum arou…
Nephrogenic systemic fibrosis is a new, rare disease of unknown cause that affects patients with renal failure. Single cases led to the suspicion of a causative role of gadodiamide that is used for magnetic resonance imaging. This study therefore reviewed all of the authors' confirmed cases of nephrogenic systemic fib…
View Cases T-69/00, <i>FIAMM and FIAMM Technologies</i>, T-151/00, <i>Le Laboratoire du Bain</i>, T-301/00, <i>Fremaux</i>, T-320/00, <i>CD Cartondruck AG</i>, T-383/00, by Anne Thies - Common Market Law Review
The adsorption and the growth of ZnO on -Al2O3(0001) surface at various temperatures were theoretically calculated by using a plane wave pseudopotentials (USP) method based on density functional theory. The average adsorption energy of ZnO at 400, 600 and 800 C is 4.160.08, 4.250.11 and 4.050.23 eV respectively. Tempe…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Two-nanosecond molecular dynamics simulations of the crystal lattice of an active complex of pT160-CDK2 kinase/cyclin A/ATP-Mg 2+ /substrate were performed. The simulations showed that the structures of the wild-type CDK2 complex and the mutant CDK2 complex involving the substitution G16S-CDK2 corresponding to the yea…
In this work the influences of chain stiffness, solution concentration, and preparation methods on the formation and efficiency of highly oriented polyimide alignment layers are investigated. To quantify the performance of the alignment layers in liquid-crystalline (LC) cells, the orientation of a calamitic bis-azo dy…
Abstract A static strength analysis finite-element model has been developed using the ANSYS computer code in order to simulate the axial compression in CANDU type fuel bundle subject to hydraulic drag loads, deflection of fuel elements and stresses and displacements in the end plates. The validation of the finite-elem…
Rapid heating and cooling are commonly encountered events in integrated circuit processing, which produce thermal shocks and consequent thermal stresses in wafers. The present paper studies the heat transfer in sapphire wafers during a thermal shock as well as the dependence of the wafer temperature on various process…
In this paper the electric and magnetic field distribution is investigated in solid toroidal cores with rectangular cross section. An analytical method is used in which the field distribution is calculated by means of orthogonal expansion. Based on the results, the influence of various parameters, such as frequency an…
Pure zirconium oxide nanocrystalline particles of the size range 6–140 nm in diameter are fabricated from ultrafine metallo-organic complexes by thermal hydrolysis at 120°C and heat treatment at 125 to 1025°C. X-ray powder diffraction for nearly monodispersed nanocrystallites reveals that the critical size of the ferr…
With the use of light scattering and viscometry, as well as the employment of various aprotic solvents for the polymer synthesis, the molecular characteristics of two poly(amic acids), namely, poly[4,4′-bis(4″- N -phenoxy)diphenylsulfone]amic acid of 1,3-bis(3′,4-dicarboxyphenoxy)benzene and poly[4,4′-bis(4″- N -pheno…
A technique to determine the cross-linked fraction or gel content of polyethylene materials using a differential scanning calorimeter (DSC) is presented. The difference between the onset time of the melt peak of a neat sample and a cross-linked sample of the same material can be related to the gel content of the sampl…
Pregnane glycosides constitute a class of compounds widely distributed in the plant kingdom. Many of them have shown either anticarcinogenic or cancer inhibitory properties, besides other useful biological activities. New chromatographic techniques and advances in spectroscopic and spectrometric methods have accelerat…
X-ray studies of TmFeO3 single crystals in the spontaneous spin-reorientation region demonstrate the absence of lattice distortions and no lowering of the symmetry of the crystal from rhombic to monoclinic and thus confirm the purely magnetic nature of the Γ2–Γ24–Γ4 spin reorientation in orthoferrites.