Materials Literature
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Using synchrotron-based x-ray diffraction we have studied the behaviour of two different preparations of the super hard material AlMgB14 at pressures up to 41 GPa. Analysis of lattice parameter data from the high-pressure x-ray measurements provides a bulk modulus (K) of 196 GPa and a pressure derivative of the bulk m…
This study employs a facile method to selectively fabricate a pair of ZnO films on glass slide with controllable transparency and conductivity. The resultant surfaces both show static superhydrophobicity with alike contact angles of 155° and 158° but exhibit a significant difference under dynamic conditions. The slidi…
Compósitos poliméricos com fibras naturais vêm sendo bastante estudados nas duas últimas décadas com algumas aplicações já bem estabelecidas, principalmente no setor automotivo. No entanto, suas aplicações são limitadas pelo seu baixo desempenho mecânico e alta absorção de umidade, comparado aos compósitos com fibras…
Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containing quinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared by melt blending and the formation of nanocomposites was characterized using X-ray diffraction (XRD) and transmission electron microsco…
Increasing research interest in the new and unusual properties of nanotechnology-related pharmaceuticals and medical devices has led to international and national reviews of safety regulation. Significant considerations emerging here are the relative paucity of metrological and toxicological data, as well as the absen…
GaPd 2 ,orthorhombic, Pnma (no. 62), a =5.4829(8) , b =4.0560(4) , c =7.7863(8) , V =173.2 3 , Z =4, R gt(F) =0.022, wRref(F) =0.029, T =295 K.
Despite the unparalleled mechanical properties of carbon nanotubes (CNTs), experiments have revealed large scattering which could be attributed to structural defects. How two neighboring defects may interact and influence the mechanical properties of CNTs is still unclear. Here, interactions between a Stone-Wales (SW)…
An intensive electrocaloric effect in the uniaxial ferroelectric NH4HSO4 near the second-order phase transition (T 1 ≈ 271 K) is studied. A high electrical conductivity of the NH4HSO4 crystal is revealed, and its temperature dependence is investigated. The results obtained are analyzed together with the data available…
It has been established that deviations from stoichiometry during the growth of ZnSe crystals result in point defects, which influence its electronic properties. We report on detailed photoluminescence results and their systematic analysis for ZnSe nanowires. We studied photoluminescence from vapor-phase grown undoped…
A normal coordinate analysis on nitrazepam has been carried out with a set of symmetry co-ordinates following Wilson's F-G matrix method. The potential constants evaluated for the molecule are found to be in good agreement with literature values thereby conforming the vibrational assignments. To check whether the chos…
The electronic structure of shandite Co 3 Sn 2 S 2 was determined by photoelectron spectroscopy and compared with ab initio band structure calculations. Presented results give evidence that this compound has half-metallic ferromagnetic properties.
An Al-Co-Ce alloy system has been developed with three important protection abilities when deployed as a metal coating over high-strength aerospace alloys such as AA2024-T351 (UNS A92024). These alloy coatings can serve as a local corrosion barrier with tunable anodic properties, act as a sacrificial anode (i.e., its…
ABSTRACT The in vitro and in vivo research results show very low corrosion rate of Ti bioalloys. Among different sources of corrosion, the general and localized corrosion in vitro and fretting corrosion in vivo are the most expected degradation processes. Three possible mechanisms of dissolution of Ti biomaterials inc…
We demonstrate five methods of arranging smectite clay tactoids into layered arrangements as a part of the quest for the biomimetic simulation of nacre. Provided the clay is not fully exfoliated, the tactoids retain sufficient rigidity for alignment and we present micrographs which demonstrate these ordered structures…
The present experimental and theoretical study investigates the effect of nickel on the phase balance and resulting properties of a 22Cr duplex stainless steel. The decrease in nickel was balanced by nitrogen and manganese additions. It was found that a minimum nickel content was required to maintain mechanical and co…
This paper presents a Monte Carlo (MC) modeling of heat conduction in heavily doped (p+ and n+) porous silicon (PS) films known as mesoporous silicon (meso-PS). A three-dimensional pore network generator is developed to better reproduce the structure of low porosity (fv<50%) meso-PS. The submicron scale heat co…
Degradation products of titanium implants include free ions, organo-metallic complexes, and particles, ranging from nano to macro sizes. The biological effects, especially of nanoparticles, is yet unknown. The main objective of this study was to develop Ti-protein antigens in physiological solutions that can be used i…
Abstract The crystal structures of the mendipite series Pb 3 O 2 Cl 2 —Pb 3 O 2 Br 2 have been solved by direct methods. The structures are based upon [O 2 Pb 3 ] 2+ double chains of edge-sharing OPb 4 tetrahedra. There are three symmetrically independent Pb 2+ cations. The number of nonequivalent halogen sites is two…
Abstract. Ultra thin platinum films were grown by dc magnetron sputtering on thermally oxidized Si (100) substrates. The electrical resistance of the films was monitored in-situ during growth. The coalescence thickness was determined for various growth temperatures and found to increase from 1.3 nm for films grown at…
Quantification of quantum dots (QDs) is essential to the quality control of QD synthesis, development of QD-based LEDs and lasers, functionalizing of QDs with biomolecules, and engineering of QDs for biological applications. However, simple and accurate quantification of QD concentration in a variety of buffer solutio…