Materials Literature
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Microgel particles with a soft repulsive interaction potential are investigated with particle tracking methods to study the phase behavior of soft-sphere systems. The use of poly(N-isopropylacrylamide) particles allows the effective volume fraction of a sample to be tuned via thermal modulation without altering the pa…
Purpose This paper aims to present a 3D numerical analysis of the load noise generation associated with large, oil immersed three‐phase power transformers. Design/methodology/approach After studying the mechanical behavior of the winding structures of transformers, the results of coupled magneto‐mechanical simulations…
Abstract A modified clay was used to prepare poly( L ‐lactic acid)/clay nanocomposite dispersions. X‐ray diffraction and transmission electron microscopy experiments revealed that poly( L ‐lactic acid) was able to intercalate the clay galleries. IR spectra of the poly( L ‐lactic acid)/clay nanocomposites showed the pr…
Crystallization of two-dimensional spherulitic calcium carbonate films was performed on planar films of chitosan in the presence of poly(acrylic acid) (PAA). PAA, electrostatically bound to the chitosan substrate, increased the local concentration of calcium at the surface, thereby promoting CaCO 3 crystallization the…
Purpose – The paper presents an application of the scaling theory in a description of energy losses in soft magnetic materials in order to improve an agreement between measurements and theoretical models.
Abstract Novel cofacial bismetallophthalocyanines and theirwater‐soluble derivatives were prepared. The precursor4,4′‐(2‐phenyl‐1,3‐dioxane‐5,5‐diyl)bis(methylene)bis(oxy)diphthalonitrile 3 was obtained by the reaction of [5‐(hydroxymethyl)‐2‐phenyl‐1,3‐dioxan‐5‐yl] methanol 1 and 4‐nitrophthalonitrile 2 with K 2 CO 3…
Tetraazaperopyrene and a range of derivatives have been synthesised and their photophysical and redox-chemical properties studied. The parent compound, 1,3,8,10-tetraazaperopyrene (1), was prepared by treating 4,9-diamino-3,10-perylenequinone diimine with triethyl orthoformate, whereas the 2,9-disubstituted derivative…
Growth of carbon nanotubes (CNTs) by metal-catalyzed thermal chemical vapor deposition (CVD) upon flat silicon substrates is studied as a function of growth temperature. It is found that the CNT growth rate at a given temperature is constant for a certain amount of growth time, after which growth ceases; the product o…
Abstract A method for the preparation of well‐defined crystallites of MgCl 2 ‐supported Ziegler‐Natta catalysts on Si wafers has been developed. This has been achieved by the spin‐coating of a MgCl 2 solution onto a flat Si wafer, followed by controlled crystal growth to give well‐defined MgCl 2 · n EtOH crystallites.…
The authors have investigated the dynamic properties of liquid nickel near the melting point by means of first principles molecular dynamics simulations in the framework of the density functional theory. Single-atom as well as collective dynamic properties are determined and transport coefficients are deduced. The cal…
A range of fullerenes (C60) functionalized with long alkyl chains have been synthesized and inserted into single-walled carbon nanotubes. The impact of the alkyl chain length and of the type of linker between the addend and the fullerene cage on the geometry of molecular arrays in nanotube has been studied by high-res…
Abstract We have systematically studied the thin film morphologies of asymmetric polystyrene‐ block ‐poly(ethylene oxide) (PS‐ b ‐PEO) diblock copolymer subjected to solvent vapors of varying selectivity for the constituent blocks. Upon a short treatment in neutral or PS‐selective vapor, the film exhibited a highly or…
The structural features of the ferroelectric compound Sr 2 NaNb 5 O 15 have been carefully studied. A detailed investigation has been performed by means of room temperature (RT) and high temperature (HT) powder X-ray diffraction (XRD), selected area electron diffraction (SAED), high resolution electron microscopy (HRE…
A top-down/bottom-up approach has been developed to fabricate mesoporous silica with well-aligned mesochannels of controlled orientation by means of cooperative assembly of an amphiphilic triblock copolymer (P123) and silica species within lithographically designed confined nanospaces. Some mesochannel patterns that c…
Abstract L,L ‐lactide (LA) and ε ‐caprolactone (CL) block copolymers have been prepared by initiating the poly( ε ‐caprolactone) (PCL) block growth with living poly( L,L ‐lactide) (PLA*). In the previous attempts to prepare block copolymers this way only random copolyesters were obtained because the PLA* + CL cross‐pr…
Clewlike ZnO superstructures were synthesized using a copolymer-controlled self-assembly method in the presence of urea. The structural properties were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and selected-area electron diffraction techniques. It was observe…
Some of the studies on the dynamics of cavitating bubbles often consider simplified submodels assuming uniform fluid properties within the gas bubbles, ignoring chemical reactions, or suppressing fluid transport phenomena across the bubble interface. Another group of works, to which the present contribution belongs, i…
Anthracene hydrogenation in aqueous micellar solutions is catalyzed at room temperature by ionic-surfactant-protected gold and silver nanoparticles (NPs) with well-controlled particle sizes. When sodium borohydride was used as the hydrogen source in the presence of these NPs, the only product obtained in the reaction…
A method is presented for the preparation of hyaluronic acid derivatives obtained through triazine-activated amidation. A number of amines were successfully reacted with hyaluronic acid carboxyl groups using 2-chloro-4,6-dimethoxy-1,3,5-triazine as an activating species in a mixture of water and acetonitrile under neu…
For the first time, sorghum leaves and stems have been used to produce natural cellulose fibers with properties suitable for composite, textile, and other high-value fibrous applications. The leaf and stems fibers produced are multicellular and have similar cellulose contents. The breaking tenacity and elongation of t…