Materials Literature
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The thermodynamical stability of complex transition metal hydrides M 2 FeH 6 is investigated by first-principles density-functional calculations. In addition to the reported alkaline-earth compounds (M = Mg, Ca, and Sr), hypothetical Mn 2 FeH 6 and Zn 2 FeH 6 are considered to examine chemical trends. Some double-cati…
In this paper, high-density carbon nanotube (CNT) are grown on an oxidized Si substrate by thermal chemical vapor deposition (CVD). CNT are synthesized by thermal CVD at 700°C in a C2H2atmosphere and used to fabricate a gas sensing-device. The average length and diameter of the CNTs are ~ 4.52 μm and 45 nm, respective…
Macroscopically, a polymer-stabilized blue phase liquid crystal (BPLC) is assumed to be an optically isotropic medium. Our experiment challenges this assumption. Our results indicate that the optical rotatory power (ORP) of some nano-scale double-twist cylinders in a BPLC composite causes the polarization axis of the…
Four new charge-transfer (CT) complexes have been formed in the reaction of the topical antiseptic agent acriflavine (Acf) with the acceptors quinol (QL), picric acid (PA), tetracyanoquinodimethane (TCNQ) and dichlorodicyanobenzoquinone (DDQ). The reactions have been studied spectrophotometrically in methanol and the…
Here, the phase behaviors of polystyrene- block -poly( l -lactide) (PS–PLLA) diblock copolymers are studied, and network phases can be found. In addition to conventional double gyroid phase with double networks, a single network phase (an Fddd phase with orthorhombic network) can be found, as evidenced by small-angle…
We reported a controllable way of removing excess Fe in Fe 1+ y Te 0.6 Se 0.4 by annealing in a fixed amount of O 2 . Compared with the weak superconductivity induced by dilute acids, O 2 annealing can successfully induce bulk superconductivity. Proper O 2 annealing changes the temperature dependence of resistivity at…
Co/ZnO and Co/ZnAlO films were prepared by depositing ultrathin cobalt layers and semiconductor layers on glass substrates at room temperature. The films consist of metallic Co particles, semiconductor matrix, and an interfacial magnetic semiconductor with the substitution of Co(2+) for Zn(2+) in the ZnO lattice at th…
The present work investigates the morphological and electrochemical behavior of hot-dip galvanized (HDG) steel substrates that were pre-treated with 3-glycidoxypropyltrimethoxysilane (GPTMS) and bisphenol A (BPA) modified with cerium ion-activated CeO2 nanoparticles. The morphology of the coatings before and after the…
Integrating polymers with inorganic nanostructures is difficult due to wetting and surface energy considerations. In this paper, we developed an electropolymerization method to grow conformal polymers on high aspect ratio nanostructures. Our method is shown to improve the polymer filling rate inside the nanostructures…
The perfect crystalline nature along with a defect ridden surface controls the electrical and magnetic properties of ZnOnanowires. Herein, a soft chemical approach is presented to grow ZnOnanowires in powder as well as highly oriented nanowirefilm form. Photoluminescencemeasurements reveal high surface defects in as-g…
Visions about the use of nanotechnologies in the city, including in the design and construction of built environments, suggest that these technologies could be critically important for solving urban sustainability problems. We argue that such visions often overlook two critical and interrelated elements. First, conjec…
The deformation-DIA apparatus (D-DIA) coupled with synchrotron X-rays allows investigating materials elastic and plastic properties at high pressure. Most D-DIA deformation cells use alumina pistons that can also be used for measurement of the differential stress in the compression column by in situ X-ray diffraction.…
Abstract Several detailed studies have been done on the characterization of organoclays and the type of structures developed when they interact with alkylammonium molecules. Few published contributions exist, however, on the distribution of surfactant within the organoclays and the mechanism by which they are intercal…
In the present study the chemical modification of Ficus carica bast fiber with acrylic acid using ceric ammonium nitrate and nitric acid was done in aqueous medium. The raw and modified fibers were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric…
A small amount of Graphene and Multi walled carbon nanotubes (MWCNT) by direct mixing were employed to disperse these nanoparticles into a mono-component epoxy system and used as matrix for advanced composites with woven Glass and Carbon fiber reinforcements. These nanoparticles were added directly into the hosting sy…
Abstract Heterogeneous TiO 2 /Cu 2 O nanocomposite was synthesized for photocatalysis through surface impregnation in conjunction with the environmentally friendly soft chemical reduction strategy. The detailed structural, compositional, optical and photoelectrochemical properties of the obtained products are analyzed…
Over 40 months of low field BEOL TDDB data obtained on different test vehicles with spacings ranging from 90-30nm and OSG low-k dielectrics with k-values ranging from 3.22.0 are summarized. For the dielectrics with k≥2.5, a simultaneous maximum likelihood fit with a fixed acceleration factor and varying distributional…
We demonstrate a capability in combining two kinds of nanosize and microsize particles of core-shell Al@Al2O3@SiO2 with aluminum cores to form multilayer coating structures as fillers in polyimide matrix for electronic applications. The core-shell Al@Al2O3@SiO2 structure can effectively adjust the relative permittivit…
A simple method was applied to prepare coated silver nanoparticles with polymerizable surfactants. In this respect, Noigen R-N10 was modified by esterification with maleic anhydride. The produced surfactant was used as dispersing agent for silver nanoparticles, which prepared from AgNO3. The size and the morphology of…
Abstract The stabilities of possible Y (R 3+ + R 2+ + Li + ) clusters around the W anion (O1 site) of the tourmaline structure were checked using the bond-valence approach. Arrangements involving R 3+ = Al 3+ or Fe 3+ and R 2+ = (Fe, Mn, Mg) 2+ were all found to be stable. Structural data show a strong linear correlat…