Materials Literature
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We report a study on multiferroic bismuth ferrite (BiFeO3, BFO)-ferromagnetic lanthanum strontium manganese oxide (La0.7Sr0.3MnO3, LSMO) epitaxial interfaces by scanning transmission electron microscopy-energy dispersive spectroscopy (STEM-EDS) and energy-filtered transmission electron microscopy (EFTEM). Epitaxial (0…
The purpose of this work is to experimentally investigate the effect of annealing treatment on the springback at room temperature for AZ31 magnesium alloy sheets, which were produced by rolling in a reversible warm mill after twin roll strip casting. Microstructure evolutions were investigated using optical microscopy…
Carbon Nanotubes (CNT) were synthesized by Chemical Vapor Deposition on Fe-Mo-MgO catalyst, by using ethanol (C 2 H 5 OH) as a carbon source and argon (Ar) as a carrier gas. The Reaction conditions are important factors that influence the yield and quality of carbon nanotubes. The effects of temperature, synthesis tim…
Undoped and La-doped ZnS thin films are prepared by chemical bath deposition (CBD) process through the co-precipitation reaction of inorganic precursors zinc sulfate, thiosulfate ammonia and La 2 O 3 . Composition of the films is analyzed using an energy-dispersive x-ray spectroscopy (EDS). Absorption spectra and spec…
The electrocatalytic reduction of hydrogen peroxide on a glassy carbon (GC) electrode modified with a ruthenium oxide hexacyanoferrate (RuOHCF) was investigated using rotating disc electrode (RDE) voltammetry aiming to improve the performance of the sensor for hydrogen peroxide detection. The influence of parameters s…
The chemical state of elements in enargite, Cu(3)AsS(4), has been traditionally interpreted assigning the monovalent (+1) state to copper, pentavalent (+5) to arsenic, and divalent (-2) to sulphur. However, there are some evidences that make this interpretation not fully satisfying. These uncertainties reflect on the…
Production of nanodiamond particles containing substitutional nitrogen is important for a wide variety of advanced applications. In the current work nanodiamond particles synthesized from a mixture of graphite and hexogen were analyzed to determine the presence of substitutional nitrogen using pulsed electron paramagn…
Atomistic computational methods such as molecular dynamics and the Green-Kubo method are employed to shed light on the transport behavior of thermal phonons in models of graphene-based nanophononic crystals comprising periodic arrays of holes. We calculate the phonon lifetime and thermal conductivity as a function of…
Thermal conductivity Λ P of solid cyclohexane is measured at a pressure P = 0.1 MPa in the temperature range from 80 K to the melting point, which covers the ranges of low-temperature orientationally ordered phase II and high-temperature orientationally disordered phase I. Thermal conductivity Λ V is measured at a con…
Ultralong zinc oxide nanotubes have been synthesized on glass substrate by a simple chemical bath deposition. The nanotubes are hexagonal with the core diameter about ~200 nm. The length of the nanotubes was about 10 μm. No specific alignment of the nanotubes on the glass substrate was observed. The morphology of the…
In this paper, we describe the size reduction and phosphorus doping of silicon nanocrystals (SiNCs) fabricated using a very high frequency (VHF) plasma deposition system. The size reduction of SiNCs is achieved by changing the VHF plasma power. The size of SiNCs changes from 10 to 5 nm. We discuss the relationship bet…
Abstract The mixing and de‐mixing properties of highly viscous fluids can be described as a diffusive system driven by an external velocity field. In order to analyze the micro‐morphological evolution with a diffusion theory of heterogeneous mixtures we apply a Cahn‐Hilliard phase‐field model, which is here extended b…
The chemical and structural effects of processing on the crystallization of nitrogen doped Ge2Sb2Te5 is examined via x-ray photoelectron spectroscopy (XPS), x-ray absorption spectroscopy (XAS), time resolved laser reflectivity, and time resolved x-ray diffraction (XRD). Time resolved laser reflectivity and XRD show th…
Transformer inrush currents have always been a concern in a power industry. Inrush currents generated by unloaded power transformer often reduce power quality on the system. Over the last decades, methods have been proposed to remove transformer inrush currents. To improve this situation, this paper proposes an active…
This work analyses the effect of boron additions (up to 195 ppm) in a directionally solidified high chromium white iron (17Cr–2·5C). Owing to its high level of segregation during solidification, boron additions have been able to change the solidification mechanism and hence to modify the microstructure of the iron. Mi…
In search of strategies to regulate the photochemical and photophysical properties of photochromic oxazines, we designed a multichromophoric compound incorporating 3H-indole, benzooxazine, and 2-(4-dimethylaminophenyl)ethynyl fragments. We synthesized this molecule in two steps in an overall yield of 51%, starting fro…
The species composition, cell concentration ( N ), and biomass ( B ) of the phytoplankton, as well as the chlorophyll a (Chl a ) concentration, primary production ( PP ), and the concentrations of the dissolved inorganic micronutrients (phosphorus, silica, nitrogen as nitrite), were estimated for Kandalaksha Bay (KB),…
Liquid crystals (LCs) and polymers are extensively used in various electro-optical applications. In this paper, normal mode polymer stabilized cholesteric LC film is prepared and studied. The effects of chiral dopant and monomer concentrations on the electro-optical properties, such as contrast ratio, driving voltage,…
A green process for the oxygen-free conversion of methane to high-concentration ethylene and hydrogen in a plasma-followed-by-catalyst (PFC) reactor is presented. Without any catalysts and with pure methane used as the feed gas, a stable kilohertz spark discharge leads to an acetylene yield of 64.1%, ethylene yield of…
The influence of silica nanoparticles on the properties of systems of the cement-sand-water type was investigated experimentally. Nanoparticles were separated from natural hydrothermal solutions according to the two-stage technological scheme including membrane concentration and cryochemical vacuum sublimation drying…