Materials Literature
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For Notch Filters, Rugate designs with a small index contrast and apodisation are well known in the literature. The required deposition of gradient index layers or so called flip flop structures is very complicated and difficult to manufacture. Higher order H/L stacks of coating materials with high index contrast resu…
The interplay of the electron transfer integral and lattice elastic energy in ${A}_{1\ensuremath{-}x}{A}_{x}^{\ensuremath{'}}{\text{CoO}}_{3}$ is investigated by neutron diffraction and the pair density function analysis. By effectively widening the bandwidth with Ca, Sr, and Ba substitutions at the $A$ site, evidence…
In this work lipase was found to be an effective catalyst for the polycondensation of a diester with a diamine to form a polyamide. The reaction is relatively mild and can be achieved at a high yield at relatively low temperatures. The resulting polyamide is amenable to derivatization reactions, thereby generating str…
Dynamic self-consistent field theory and Navier-Stokes equation are coupled to study hydrodynamic effects on the disorder-to-order transition of diblock copolymer melts. Simulations are performed for different values of the viscosity and the results are compared with those without the hydrodynamic effects. The lower t…
Abstract Flammability of polypropylene/ethylene–propylene‐diene copolymer (PP/EPDM) filled with melamine phosphate (MP) and pentaerythritol phosphate (PEPA) was studied by limiting oxygen index (LOI), UL 94, and cone calorimetry. The thermal degradation of the composites was investigated using thermogravimetric analys…
Nephrogenic Systemic Fibrosis and Gadolinium: A Perfect StormPatrick M. Colletti1Audio Available | Share
The transport of an infinitely thin, hard rod in a random, dense array of point obstacles is investigated by molecular dynamics simulations. Our model mimics the sterically hindered dynamics in dense needle liquids. Transport becomes increasingly fast at higher densities, and we observe a power-law divergence of the d…
We studied the photoluminescence (PL) and photovoltaic current-voltage characteristics of the three-junction InGaP/InGaAs/Ge solar cells by depositing Au nanoclusters on the cell surface. The increases of the PL intensity and short-circuit current after incorporation of Au nanoclusters are evident. An increase of 15.3…
We synthesized hybrid materials by sol-gel process, using: methyltriethoxysilane, tetraetylorthosilicate and vinyltriethoxysilane, in the presence of Rhodamine 6G. It was synthesized as well organic-inorganic hybrids with addition of tetraisopropyl orthotitanate and maleic anhydride UV-VIS spectra of dye show two abso…
We report a method to synthesize amorphous hollow carbon spheres, with diameters ranging from 100 to 800 nm, which are dispersed among bent graphitized carbon nanotubes using radio frequency plasma-enhanced chemical vapour deposition in mixed CH 4 /H 2 gases. The products are characterized by techniques including scan…
BaTiO3 xerogel hollow fibers have been prepared firstly by co-electrospinning the sol precursor, and the polycrystalline BaTiO3 ceramic hollow fibers were obtained after calcination at 1000°C. The obtained hollow fibers made up of well-crystallized nanocrystals were about 400 nm to several micrometers in outer diamete…
Abstract Immiscible blends of high molecular weight commercial poly( p ‐dioxanone) (PPDX) and poly(ε‐caprolactone) (PCL) were prepared by melt mixing in a wide composition range. The materials were exposed to a hydrolysis medium (phosphate buffer kept at a constant pH of 7.2) at 37°C during 36 weeks. The change in wei…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPseudo-Single-Crystalline Self-Assembled Structure Formed from Hydrophilic CdSe and Hydrophobic Au Nanoparticles in the Polystyrene and Poly(4-vinylpyridine) Blocks, Respectively, of a Polystyrene-b-poly(4-vinylpyridine) Diblock Cop…
A nonlinear theory is developed for a heat-conducting viscoelastic composite which is modelled as a mixture consisting of a microstretch Kelvin–Voigt material and a microstretch elastic solid. The strain measures, the basic laws and the constitutive equations are established and presented in Lagrangian description. Th…
Abstract Poly(lactic acid)–poly(ethylene glycol)–poly(lactic acid) (PLA‐PEG‐PLA)/SiO 2 hybrid material is prepared by sol–gel method using tetraethoxysilane (TEOS) and PLA‐PEG‐PLA as raw material. From Fourier transform infrared spectroscopy (FTIR) and X‐ray photoelectron spectroscopy (XPS) spectra, the hydroxyl group…
The constrained optimization approach is applied to the design of quasi-rugate optical coatings. These coatings are defined as multilayers with no thin layers where refractive index profiles resemble rugate-type refractive index profiles and where spectral properties are typical for rugate filters. It is shown that al…
Using the method of direct integration, we found continuous and integrable solutions of the differential equations for plane elasticity and thermoelasticity in a semi-plane with the traction, displacement, or mixed type boundary conditions. We established the one-to-one relations between the tractions and displacement…
Abstract The method used in the past 30 years for describing the swelling of polymers by solvents is mainly based on the Hansen three‐dimensional solubility parameters. However, the subjectivity of its implementation as well as its limited success for several polymers, and in particular elastomers, which constitute ch…
Aligned carbon nanotubes have great potential for advanced nanotube transistors and integrated circuits. In this article, we studied the carbon nanotube alignment mechanism using a chemical vapor deposition growth on a-plane sapphire substrates. We synthesized carbon nanotubes of different diameters by controlling the…
Abstract A gel‐spinning process was used in an attempt to prepare a gelatin fiber with a high level of drawability. A gel fiber prepared by extrusion of 15 wt % gelatin in dimethyl sulfoxide into methanol at −20°C was drawn to sixteen times the original length. After extraction of the dispersion medium, the mechanical…