Materials Literature
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Abstract The nonlinear self‐organizing kinetics that occur during the electrosynthesis of porous anodic alumina (PAA) are investigated. It is first found that the ordered PAA nanoarray forms through the self‐organization of aluminum hydroxide colloids, rather than the traditional pitting‐corrosion mechanism. There is…
Inorganic electroluminescent (iEL) thin films are used in light-emitting devices and are functional under alternating current conditions only. Stable luminescent light has yet to be obtained under direct current conditions. We postulated that thin-film iEL light emission occurs when an injected electron occupies the e…
Improvement in hemocompatibility of highly oriented pyrolytic graphite (HOPG) by formation of nanostructured surface by oxygen plasma treatment is reported. We have showed that by appropriate fine tuning of plasma and discharge parameters we are able to create nanostructured surface which is densely covered with nanoc…
The process of self-assembly is universal and lies at the heart of biological structures and function. Peptide aggregation, while considered a nuisance in peptide chemistry, soon gained interest with the discovery of pore-forming peptide toxins and had been an area of intense research during last century and even to d…
The method of synthesis of oligoetherols with purine ring and boron was presented based on reaction of hydroxyethyl derivative of uric acid with boric acid and alkylene carbonates. Their physical properties and structure were established. The obtained oligoetherols were suitable reactants to obtain polyurethane foams.…
Hybrid materials of carbon nanotubes (CNTs) coated with nickel-cobalt (Ni-Co) oxide nanoparticles were synthesized using electroless plating. Transmission electron microscopy images showed that Ni-Co oxide nanoparticles were dispersively distributed on the external surface of CNTs. The composites of Ni-Co oxides modif…
A new development of equal channel angular pressing method to fabricate wire-formed samples has been proposed and experimented. In this approach, wire-formed specimen, which is inserted inside a polyurethane rubber pad material, has been pressed using conventional equal channel angular pressing die. Commercial pure co…
We have fabricated intergrain nanobridge junctions from a Ba0.6K0.4Fe2As2 film and observed their weak coupling effects. We prepared the junction by patterning a nanobridge across a natural grain boundary by using a focused ion beam etching technique and studied their superconducting transition properties. The resisti…
Single-crystalline epitaxial SrFeO 2 thin films were grown on perovskite substrates with various lattice parameters by combining pulsed laser deposition method with solid-phase reduction using CaH 2 , and these structural and transport properties were investigated. The highly crystalline films prepared on lattice-matc…
The light-induced smectic C (SmC) to bicontinuous cubic (Cub(bi)) phase transition was investigated using grazing-incidence X-ray diffraction (GI-XRD) and Fourier transform infrared (FT-IR) spectroscopy to elucidate the mechanism at the molecular level. The sample was a binary mixture of 4'-n-docosyloxy-3'-nitrobiphen…
The simultaneous manipulation of both charge and spin has made diluted magnetic semiconductors (DMS) a potential material for the fabrication of spintronic devices. We report DMSs based on ZnO doped with Cr in wurtzite (WZ) and zinc-blend (ZB) geometries. The injection of Cr impurities at a concentration of 6.25% has…
Single crystals of a metal organic complex (C5H12N)CuBr3 (C5H12N = piperidinium, pipH for short) have been synthesized, and the structure was determined by single-crystal X-ray diffraction. (pipH)CuBr3 crystallizes in the monoclinic group C2/c. Edging-sharing CuBr5 units link to form zigzag chains along the c axis, an…
This letter presents the fabrication and characterization of freestanding circular GaN gratings on a GaN-on-silicon platform. Optical modes propagate within the freestanding GaN membrane and their number decreases as the thickness of GaN membrane is reduced. Backside thinning of freestanding GaN membranes is used to o…
This paper describes the use of microtubules (MTs) as nanoscale templates for the biologically directed growth and assembly of cadmium sulfide (CdS) nanotubes. CdS is a wide bandgap semiconductor with valuable optical, electronic, and chemical properties, and the organization of CdS nanostructures is critical to their…
We review the way to fabricate large-scale, high-quality and single crystalline graphene epitaxially grown on Ru(0001) substrate. A moiré pattern of the graphene/Ru(0001) is formed due to the lattice mismatch between graphene and Ru(0001). This superstructure gives rise to surface charge redistribution and could behav…
This paper presents a novel set-up designed to investigate plastic deformation of a metal at high strain rates. The set-up is similar to conventional split Hopkinson pressure bar but the striker bar is eliminated and instead of it a spherical projectile, accelerated to high velocity with a two-stage light-gas gun, imp…
In the current investigation, TEM in-situ heavy ion (1 MeV Kr2+) irradiation with helium pre-injected at elevated temperature (400 °C) was conducted to simulate in-reactor neutron irradiation induced damage in CANDU spacer material Inconel X-750, in an effort to understand the effects of helium on irradiation induced…
We investigated the capability of molecular triads, consisting of two strong fluorophores that were covalently linked to a photochromic molecule, for optical gating. Therefore we monitored the fluorescence intensity of the fluorophores as a function of the isomeric state of the photoswitch. From the analysis of our da…
Scatterometry is an indirect optical method for the determination of photomask geometry parameters from scattered light intensities by solving an inverse problem. The Bayesian approach is a powerful method to solve the inverse problem. In the Bayesian framework estimates of parameters and associated uncertainties are…
Biodegradable nanocomposites comprising of organically modified montmorillonite-reinforced polylactic acid (PLA) and polyhydroxybutyrate (PHB) were assessed. This study investigates different nanocomposites mixing techniques as methods of achieving exfoliation. The incorporation of reverse flow mixing sections resulte…