Materials Literature
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Using classical molecular dynamics simulation together with the quantum-corrected Sutton-Chen many-body embedded-atom model, we study the rheology of several liquid fcc metals (Pb, Pt, Ir, Ag, and Rh) at ambient pressure and at four temperatures ranging from 5% below the melting temperature to 75% above the melting te…
We study the elastic properties of argon confined in mesoporous Vycor glass with a mean pore diameter of 8 nm. For this purpose volumetric adsorption and desorption measurements are combined with simultaneous ultrasonic measurements. Therewith we obtain the effective shear modulus as a function of the pore filling ref…
We consider the motion of a contact line between a fluid, gas, and solid, as it occurs when a drop advances over a solid surface. This motion is controlled by a microscopic length scale near the contact line, such as a slip length or the precursor thickness. The capillary profile inside the drop is linked to the conta…
In hot stamping operations, the primary deformation mode of plain woven textile composite is shear deformation between yarns. In-plane picture frame test is an effective method to characterize the material's shear behavior. By proposing theoretical models based on our experimental study [19,20], the present article es…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
The single-crystal diffraction study of Ce10W22O81 and powder X-ray diffraction (XRD) experiments on Ce10W22O81 and Nd10W22O81 show that the true space group of these phases is Pbnm, contrary to the previous literature reports of the space groups Pbcn and Pbcm for the rare-earth tungstates (RE = La, Ce, Pr, Nd) with t…
In the present paper we developed a model for calculating the energy of single-wall carbon nanotubes of arbitrary chirality. This model, which we call as the liquid surface model, predicts the energy of a nanotube with relative error less than 1% once its chirality and the total number of atoms are known. The paramete…
The electronic structure of GaAs and InAs quantum dots (QDs) containing a single substitutional Mn impurity is investigated in the envelope-function formalism. The Mn impurity in these compounds is known to be a shallow acceptor in the configuration ${d}^{5}+h$ and characterized by a strong antiferromagnetic $sp\text{…
Transparent conducting SnO 2 –ZnO films were fabricated by employing an inexpensive, simplified spray technique using a perfume atomiser at relatively low substrate temperature (360±5°C) compared with the conventional spray pyrolysis method. The structural studies reveal that the films are crystalline in nature with p…
The aim of this paper is to design initial salt screening procedures for manufacturing ibuprofen. Salt forms of a pharmaceutical acid racemic (R,S)-(+/-)-ibuprofen and their "developable" synthetic routes were ferreted out simultaneously through the screening of seven bases of sodium hydroxide, potassium hydroxide, L-…
The x-ray mass-attenuation coefficient of copper was measured at 108 energies between 5 and $20\phantom{\rule{0.3em}{0ex}}\mathrm{keV}$ using synchrotron radiation. The measurements are accurate to between 0.09 and 4.5 %, with most measurements being accurate to better than 0.12%. The imaginary component of the form f…
We present results of piezoresponse force microscopy studies on “uniaxial” relaxors Sr x Ba1− x Nb2O6 (SBN) and on “cubic” relaxors Pb[Mg1/3Nb2/3]1− x Ti x O3 (PMN-PT). The chosen compositions exhibit a spontaneous transition from the ergodic relaxor into the ferroelectric state. In both materials static regions of no…
The thermal stability and hydroxyl coverage of aluminum salt of 12-tungstophosphoric acid, AlPW 12 O 40, was studied by X-ray diffraction and solid-state NMR spectroscopy in comparison with the pure H 3 PW 12 O 40 heteropoly acid. The most important differences of these materials consist in the higher thermal stabilit…
Shape-controlled crystallization and self-assembly of high-ordered CaCO 3 architectures were realized by using soluble starch as structure directing agents in aqueous solution. Mushrooms, dumbbells, spheres, and truncated-octahedron CaCO 3 crystals composed of spindly microcrystals were obtained by tuning the experime…
We demonstrate the effect of surface passivation of cadmium selenide quantum dots (CdSe QDs) (~5–7 nm) by tri-n-octylphosphene-oxide (TOPO) and oleic acid (OA) on the structural and optoelectronic properties of their respective polymer : CdSe composites by dispersing them in poly(2-methoxy-5(2-ethylhexyloxy)-1,4-pheny…
Mossbauer spectra studies were used to determine the temperatures of magnetic phase transitions in some Fe-containing perovskite multiferroics and their solid solutions. In compositionally disordered materials the temperature TN of antiferromagnetic phase transition depends linearly on Fe3+ content. Partial ordering o…
Quantitative characterization of carbon nanotube (CNT) dispersions is critical for developing various CNT-based applications, e.g., transparent conducting thin films, CNT thin film transistors, CNT-reinforced composites, etc. Using both of the preparative ultracentrifuge and absorption spectrum measurements, this pape…
The biocompatibility of implanted materials and devices is governed by the conformation, orientation, and composition of the layer of proteins that adsorb to the surface of the material immediately upon implantation, so an understanding of this adsorbed protein layer is essential to the rigorous and methodical design…
Abstract Thermal processing of as‐made fluorozirconate glasses which were additionally doped with neodymium and chlorine ions leads to enhanced upconversion fluorescence intensities. The samples were annealed between 240 °C and 290 °C and the optimum value of upconversion intensity was found for the 270 °C sample. The…
A new type of hybrid semiconductor co-templated by both organic cations and inorganic polyiodide anions has been synthesized and structurally characterized. The Z-scan technique indicates that it also exhibits good third-order nonlinear optical activity.