Materials Literature
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Abstract Microspheres of 5‐fluorouracil‐loaded poly(ϵ‐caprolactone) (PCL) were prepared by spray‐drying procedure. The degradation characteristics and 5‐fluorouracil release in vitro as well as in vivo were investigated. The average molecular weight, weight loss, crystallinity, and morphology of microspheres were dete…
Surface flashover is a major consideration in a wide variety of high-voltage applications, and yet has not been studied in great detail for atmospheric conditions, with modern diagnostic tools. Environmental conditions to be considered include pressure, humidity, and gas present in the volume surrounding the dielectri…
Abstract The electrochemical and electrochromic properties of layer‐by‐layer nanoarchitectures of V 2 O 5 /chitosan and V 2 O 5 alternated with a blend of poly(ethylene oxide) (PEO) and chitosan have been examined. Using a blend was important, since multilayers of PEO/V 2 O 5 could not be built. The number of electroc…
ZnO‐based varistor ceramics were sintered under various conditions to optimize their mechanical strength. For highest strength, the optimum sintering temperature was 1070°C or below. At higher maximum temperature, the strength decreased because of grain coarsening and the increasingly inhomogeneous distribution of sec…
Understanding the process of self-assembly of peptides has been important in various biomedical engineering applications. This work focuses on the effect of peptide concentration on the molecular self-assembly of an ionic-complementary peptide, EAK16-I (AEAKAEAKAEAKAEAK), in aqueous solution. The surface tension and s…
Dielectric materials are frequently used in satellite structures for substantial savings in weight. Their dielectric nature and the effect of different forms of radiation encountered in space combine to accumulate electrical charges resulting in the occurrence of electrostatic discharges which cause harmful interferen…
Abstract A novel and effective protocol for the preparation of superparamagnetic immunomicrospheres has been developed. First, micro‐size magnetic poly (methacrylate‐divinylbenzene) (PMA‐DVB) spheres were prepared by a modified suspension polymerization method. The oleic acid coated magnetite (Fe 3 O 4 ) nanoparticles…
Thermodynamic properties of the following phase reactions in the Ag-Au-S system have been investigated via electromotive force (EMF) measurements in solid-state galvanic cells with Ag 4 RbI 5 as a solid electrolyte: Ag(cr) + Ag 3 AuS 2 (cr) = 2Ag 2 S(cr) + Au(cr) Ag(cr) + 2AgAuS(cr) = Ag 3 AuS 2 (cr) + Au(cr) Ag(cr) +…
This work discusses with the impact of corona on the long-term performance of nonceramic insulators. The aging mechanism of insulating materials and the partial discharges measurement (PD) on insulating materials is also discussed. In this measurement the rise of surface temperature of some solid insulating materials…
Small-angle X-ray scattering (SAXS) was used to study the size-dependent two-body solvent-mediated interparticle interactions between dodecanethiol-coated gold nanocrystals (2−6 nm in diameter) in dilute toluene dispersions. Using a modified Zimm analysis of concentration-dependent X-ray scattering data, the second vi…
The tensile deformation and rotating-bending fatigue properties of a highelastic thin wire, a superelastic thin wire and a superelastic thin tube, all made of NiTi alloys, were investigated experimentally. The results obtained are summarized as follows: (1) The stress-strain curve of the highelastic thin wire is appro…
Abstract A systematic analysis of the melt rheological behavior of a commercial starch‐based (MaterBi®) matrix composite reinforced with short sisal fibers is presented. The effects of shear rate, temperature, fiber content and treatment were analyzed by parallel‐plate rheometry, and classical non‐Newtonian models wer…
Abstract Grain boundary (GB) self-diffusion in iron of 99.9938 and 99.97 wt.% purity was studied in B-type kinetics in the temperature range of 772 to 1050 K. For identical temperatures, the measured values of the product δ × Dgb are systematically lower for the less pure material than for the more pure one (here δ an…
The biobased epoxy nanocomposite materials containing functionalized vegetable oils (FVOs), such as epoxidized linseed oil (ELO) and epoxidized soybean oil (ESO), were processed with organomontmorillonite and silanized alumina nanowhiskers. The certain amount of diglycidyl ether of bisphenol F (DGEBF) was replaced by…
A series of novel poly(imino ketone)s (PIK) have been synthesized via palladium-catalyzed polycondensation (Hartwig−Buchwald reaction) of aromatic dichloro or dibromo ketones with various aromatic diamines. The influence of the halogen-containing monomers, concentration, temperature, and catalyst ligands on the polyco…
We present a systematic study of mobile nanoparticles (NP) and their effect on phase separation dynamics in polymer blend films. Starting with a homogeneous dispersion of silica NP in PMMA:SAN films, the NP are observed to partition into the PMMA-rich phase and stratify during phase separation. The correlation length…
This paper presents new findings on ultrasonic spray pyrolysis of zirconium hydroxyl acetate precursor drops whose sizes were precisely measured using laser light diffraction technique. Precursor concentration plays a predominant role in determination of product particle size. At 0.01 wt% precursor concentration, conv…
We report an experimental study of enhanced optical birefringence in silicon thin films on glass substrates. Form anisotropy is introduced as an atomic-scale morphological structure through dynamic control of growth geometry. The resulting birefringence is large compared with naturally anisotropic crystals and is comp…
Laboratory experiments were carried out to investigate the mechanisms of electrochemical (EC) wastewater disinfection. Artificial wastewater contaminated by Escherichia coli (E. coli) culture, and which contained different salts of NaCl, Na2SO4, and NaNO3, was used as the test medium. The experimental results do not f…
Design, synthesis, and multifunctionality of p-octiphenyl beta-barrel pores with external LRL triads and internal HH dyads are described. Molecular recognition of anionic fullerenes > calixarenes > pyrenes by guanidinium arrays at the outer pore surface is shown to result in pore opening, whereas alpha-helix recogniti…