Materials Literature
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Abstract The effects of media viscosity, mixing speed, and injection time on catalyst average particle size (APS), particle size distribution (PSD), and morphology in both conditions, with and without emulsifier, were investigated. Supports were prepared using a so‐called recrystallization method; then they were catal…
Recent developments in studies on the structure of surfaces based on ion beam triangulation are discussed. We will outline recent experimental progress in the application of this method, which is closely related to the detection of the number of emitted electrons per incident ion during scattering under surface channe…
Abstract We fabricated 222 nm AlGaN multi‐quantum well (MQW) deep‐ultraviolet (DUV) light emitting diode (LED) on high quality AlN buffers grown by ammonia (NH3) pulse‐flow multilayer growth method on sapphire substrate. We obtained remarkable enhancement of emission intensity of 220 nm‐band DUV LED by introducing thi…
Abstract Schottky barrier photodiodes based on AlN, AlxGa1–xN, GaN, and InyGa1–yN were fabricated with different compositions. In addition, novel types of UV detectors with narrow spectral bandwidths were developed by combining AlxGa1–xN Schottky barrier photodiodes and optical entrance windows made of AlyGa1–yN havin…
In this paper we examine the elastic (c′ and c44) and magnetostrictive (λ100 and λ111) behaviors of Fe100−xGex for 4
Abstract Nano‐sized epoxy oligosiloxanes (EO) were prepared by condensation reaction between 3‐glycidoxypropyltrimethoxysilane (GPTS) and Diphenylsilandiol (DPSD). Through a composition change of GPTS and DPSD, EO of various structure and sizes were obtained. The molecular structure and size of EO synthesized were inv…
Abstract We report on the morphological, structural and optical properties of a ‐plane GaN grown on r ‐plane sapphire using an AlN buffer layer grown at high temperature via MOVPE. Growth of smooth layers has been shown with the potential for device application. Atomic Force Microscopy showed submicron features and cr…
A glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWCNT) and polymer/MWCNT composite was used to study the voltammetric behaviour of three common insecticides namely cypermethrin (CYP), deltamethrin (DEL) and fenvalerate (FEN). The modified electrode surface was characterised by scanning ele…
Abstract Polycrystalline samples of CuGaSe2‐related defect compounds (DC) have been prepared by Chemical Close‐Spaced Vapour Transport (CCSVT) (thin films) and elemental synthesis (powder) respectively. In the latter case a homogenisation step was introduced during the preparation, including mechanical intermixing and…
Fourier syntheses are always affected by series-termination errors, which generate sets of positive and negative ripples around each main peak in the map. The interaction among the ripples distorts the profile of the map and moves peaks away from their correct positions. In a previous paper [Altomare et al. (2008). Ac…
Abstract Collagen‐based composite nerve conduit scaffold was prepared by freeze‐drying steam‐extrusion method and modified chemically with glutaraldehyde (GTA) by adding chitosan into collagen. Fourier transform infrared spectroscopy showed that the collagen and chitosan are certainly crosslinked through GTA. It was o…
We have calculated the adsorption energies for different hydrogen dimers adsorbed at the surface of zigzag single-walled carbon nanotubes (SWCNs) (n,0) (for n = 6-28) to identify the range of nanotube structural parameters that provide optimal adsorption energetics. We determined that, for H(2) gas in equilibrium with…
The tensile properties of poly(ethylene oxide)-based segmented block copolymers were studied in the dry and wet state. The hard segments were made up of monodisperse crystallisable tetra-amide segments (T6T6T) comprising terephthalate (T) and hexamethylenediamine (6) groups. The length of the segments making up the so…
A family of poly(propylene amine) dendrimers, decorated at their periphery with 4, 16, and 32 dansyl units and a molecular clip, composed of two anthracene sidewalls and a disulfate benzene bridging unit, show intense UV absorption and strong fluorescence in the visible region when in a CH(3)CN/CH(2)Cl(2) (1:1, v/v) s…
Lapachol (2-hydroxy-3-(3-methyl-2-butenyl)-1,4-naphtoquinone) (HLap, C(15)H(14)O(3)) reacts with Mn(2+) producing a novel polymeric complex with formula: [Mn(Lap)(2)](n). Two ligands chelate the metal through their ortho oxygen (O1, O2) moiety while two para oxygens, from other Lap ligands, complete the octahedral coo…
D: -2-Hydroxyglutaric aciduria (D: -2-HGA) is a neurometabolic disorder characterized by elevated levels of D: -2-hydroxyglutarate (D: -2-HG) in physiological fluids. Recent findings revealed that mutations in the D2HGDH gene, encoding D: -2-hydroxyglutarate dehydrogenase, cause D: -2-HGA. So far, a functionalenzyme a…
Transport properties of the edge region of RFPs are characterized by complicated mechanisms further entangled by the complex magnetic topology. Recently on RFX-mod (Sonato 2003 Fusion Eng. Des. 66–68 161) the use of an efficient feedback system for MHD control allowed the achievement of an unprecedented plasma current…
Abstract The poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV)/montmorillonite(MMT) nanocomposites were investigated by wide‐angle X‐ray scattering (WAXS). The aim of the investigation was solution intercalation of MMT with PHBV. Beside the usual orthorhombic unit cell, a stable pseudohexagonal β‐structure of PHBV w…
The electron paramagnetic resonance spectra of Cu(II) doped MgO single crystals have been re-examined in detail within the framework of a dynamic Jahn-Teller effect. The experimental 1.8 K X-band spectra can be modeled in terms of a cubic spin Hamiltonian operating within the set of four Kramers doublets corresponding…
Samarium doped cerium oxide (SDC) thin films were deposited onto optical quartz (SiO2) and Alloy 600 (Fe-Ni-Cr) substrates by e-beam evaporation of Sm0.15Ce0.85O1.95 nanopowder. The influence of electron gun power and temperature of substrate on film thickness, porosity, refractive index and crystallite size was studi…