Materials Literature
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The electrochemical properties of esters of p-hydroxybenzoic acid, called parabens, were investigated on a carbon fiber microelectrode and on a glassy carbon macroelectrode in glacial acetic acid containing 20 % acetonitrile (v/v) and sodium acetate as a supporting electrolyte. The anodic oxidation of parabens in this…
We have synthesized a partially nitridated Ca 13.7 Eu 0.3 Mg 2 Si 8 O 32 ( CMSN : Eu 2+ ) using Si 3 N 4 with a conventional solid‐state reaction and successfully determined the structural parameters by a combined Rietveld refinement method. The partial nitridation of Ca 13.7 Eu 0.3 Mg 2 Si 8 O 32 ( CMS : Eu 2+ ) led…
Abstract A novel flame retardant (SDPS) containing POSi bands was synthesized by a condensation polymerization of diphenylhydroxysilane and spirocyclic pentaerythritol di(phosphate monochloride). The structure of SDPS was confirmed by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance (…
Abstract Prepolymers prepared by reactions of 1,1′‐(methylenedi‐4,1‐phenylene)bismaleimide (BMI) with myrcene (Myr) and limonene (Lim) in 1,3‐dimethyl‐2‐imidazolidinone (DMI) at 150°C were compressed at 250°C to produce crosslinked Myr/BMI [molar ratio = 2:2–2:5 (MB22–MB25)] and Lim/BMI [molar ratio = 1:1 (LB11)] resi…
Exciton states and related optical properties of a single-walled carbon nanotube are reviewed, primarily from a theoretical viewpoint. The energies and wavefunctions of excitons are discussed using a screened Hartree-Fock approximation with an effective-mass or k·p approximation. The close relationship between a long-…
In a powder diffraction pattern one measures the intensity of Miller-indexed Bragg peaks versus the wavevector transfer sinθ/λ. With increasing wavevector transfer the density of occurrence of Bragg peaks increases while their intensity decreases until they vanish into the background level. The lowest possible backgro…
We present the results of combined theoretical and experimental investigations of the TiO${}_{2}$/Al${}_{2}$O${}_{3}$ interface. High-quality rutile films are grown on sapphire substrates and characterized by XRD and pole figures analysis. The epitaxial relations established by experiment agree well with those reporte…
We studied peculiarities of the structural reconstruction within holographically recorded gratings on the surface of several different amorphous azobenzene-containing polymers. Under illumination with a light interference pattern, two processes take place in this type of polymer. The first process is the light-induced…
Environmentally-friendly, biodegradable, “green” composites were fabricated from starch-based matrix and bagasse (sugar cane waste) fibers. Native corn starch was mixed with glycerin and water, emulsified then added to the bagasse fibers previously prepared and treated by NaOH. The composite was preheated, then presse…
A technique to design and fabricate Au–Ag bimetal microtubes for the investigation of curvature-dependent localized surface plasmon modes is demonstrated. Highly surface-enhanced Raman scattering (SERS) is observed that illustrates the distribution of localized surface plasmon modes leading to an enhanced electromagne…
Internally Gd doped mesoporous nanoparticles have been prepared and exhibit unprecedented relaxivities that are retained on external biomodification. In tuning diffusive water access, image contrast can be reversibly switched in the presence of a specific protein target.
Abstract n-ZnO : Ga/p-GaN heterojunction light-emitting diodes with different interfacial layers are fabricated by pulsed laser deposition. All the devices demonstrate nonlinear rectifying behaviour. Due to the formation of Ga2O3 interfacial layers, n-ZnO : Ga/p-GaN exhibits strong ultraviolet emission centred at 382…
As research continues, the control on the polymorph and morphology of calcium carbonate ( CaCO 3 ) becomes a hot topic because its application is limited by these parameters. The polymorph and morphology control of CaCO 3 was successfully achieved via temperature and PEG ( M w = 6000) during the decomposition of Ca (…
Hexagonally ordered mesoporous molybdenum oxycarbide/carbon (MoC/C) nanocomposites were directly accessed by heat treatment of mesostructured poly(butadiene-block-2-vinylpyridine) (PB-b-P2VP) and molybdophosphoric acid. PB-b-P2VP serves as structure-directing agent and as carbon source. The high specific surface area…
The potential of UV imaging as a new small scale flow-through dissolution testing platform and its ability to incorporate biorelevant media was tested. Furosemide was utilized as a model poorly soluble drug, and dissolution media simulating conditions in the small intestine (5/1.25 mM and 40/10 mM bile salt/phospholip…
A simple approach for preparing gradient polymer network liquid crystal (PNLC) with a large refractive index change is demonstrated. To control the effective refractive index at a given cell position, we applied a voltage to a homogeneous cell containing LC/diacrylate monomer mixture to generate the desired tilt angle…
Abstract Producing single‐wall carbon nanotubes with a given structure, in terms of diameter and chirality, is still a difficult issue. In this context, understanding the physical and chemical properties of the catalyst nanoparticle during the chemical vapor deposition synthesis is fundamental. By using tight‐binding…
Abstract Nylon-sputtered nanoparticles were prepared using a simple gas aggregation cluster source based on a planar magnetron (Haberland type) and equipped with a nylon target. Plasma polymer particles originated in an aggregation chamber and travelled to a main (deposition) chamber with a gas flow through an orifice…
In this study, M19 steel and amorphous material asynchronous motors have been examined by finite elements methods with v/f controlling. Performances of the motors have been investigated by means of analysis. The losses of amorphous and M19 steel core motors are compared at higher and lower frequencies. If amorphous ma…
In this paper, we analytically investigate multi-component Cahn–Hilliard and Allen–Cahn systems which are coupled with elasticity and uni-directional damage processes. The free energy of the system is of the form ∫Ω½Γ∇c : ∇c + ½|∇z|2+Wch(c)+Wel(e,c,z)dx with a polynomial or logarithmic chemical energy density Wch, an…