Materials Literature
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The anisotropic nature of the permittivity of tetragonal BaTiO 3 has been investigated by means of first-principles calculations using density-functional perturbation theory and constrained-force approaches. Our calculations suggest that the origin of the anisotropy is the presence of a soft mode with very shallow dou…
Alkaloids extract of Aspidosperma album was tested as corrosion inhibitor for C38 steel in 1 M HCl by using polarization and electrochemical impedance spectroscopy (EIS). Potentiodynamic polarization curves indicated that the plant extract behaves as mixed-type inhibitors. Impedance measurements showed that the double…
Abstract Medium‐chain‐length polyhydroxyalkanoates (mcl‐PHAs) are biodegradable, biocompatible polyesters produced by many bacteria as intracellular storage compounds of energy and carbon. They have gained great attention as a new green alternative to petrochemical plastic such as polypropylene. The present study was…
Carboxylated nitrile rubber (XNBR) composite containing organic filler was fabricated on lab-scale, two-roll mill. The organic filler originated from the olive husk powder (OHP). The work has two aims. The first is the role of the OHP as a co-curing agent for XNBR vulcanizate based on the fact that it is a nitrogen-co…
This study describes unpublished research on improving the solubility of benznidazole by the formation of an inclusion complex. The cyclodextrins selected were αCD, βCD, γCD, HPβCD, RMβCD and SBβCD. All complexes were obtained in solution, presenting 1:1 stoichiometry according to the phase solubility diagram. The hig…
Abstract Poly(ethylene terephthalate)/organo-modified-montmorillonite (o-MMT) nanocomposites were prepared via melt compounding. A polyester ionomer was used as a compatibilizer to increase the interaction between the nanoclay and PET. The nominal o-MMT content was 2 wt.% and the ionomer/organoclay (mass ratio) was 3:…
The boronising behaviour of pure iron and Fe–Mn alloys (1, 2, 4, 8, 12 and 16 wt-%Mn) was investigated by ‘pack boronising’ at 1100°C for 3 h to determine the effect of Mn. FeB and Fe 2 B polyphase exist on all the boronised Fe–Mn alloys, and Fe–16 wt-%Mn alloy also has MnB 2 phase in the boride layer. The usual crack…
Novel excited-state intramolecular proton-transfer (ESIPT) compounds were designed and synthesized. These compounds give aggregation-induced emission enhancement (AIEE) phenomena when their aggregate nanoparticles are formed in aqueous solution. The mechanism for the AIEE of the molecules has been studied. Because of…
Poly(2-hydroxyethyl methacrylate) (pHEMA) has been widely used in many biomedical applications due to its well-known biocompatibility. For tissue engineering applications, porous scaffolds that mimic fibrous structures of natural extracellular matrix and possess high surface-area-to-volume ratios are highly desirable.…
We demonstrate the generation of a persistent conductivity increase in vanadium dioxide thin films grown on single crystal silicon by irradiation with 1 GeV 238U swift heavy ions at room temperature. VO2 undergoes a temperature driven metal-insulator-transition (MIT) at 67 °C. After room temperature ion irradiation wi…
A novel supramolecular thixotropic gel based on low-concentration aqueous solutions of L -cysteine and silver nitrate is synthesized. Self-organization and gel formation in the system of interest is studied by means of UV and IR spectroscopy, transmission electron microscopy, dynamic light scattering, and rotational v…
Multiferroic materials such as YMnO3, which uniquely exhibit ferroelectricity and magnetism simultaneously, have been extensively studied for spintronic device applications. However, the origin of multiferroicity remains poorly understood. In this study, the structural phases of YMnO3 ceramics and their lattice distor…
Abstract The previous paper (No. 2, Vol. 12-2011) [1] were analyzed the weave and construction parameters of high density woven fabric and their influence on the pore morphology, which directly effects the functional properties such as permeability and retention. The analysis encompassed physical and optical methods o…
Prostate cancer is the most prevalent cancer in men over the age of 50 years. Prostate-specific antigen is limited as both an early detection and prognostic biomarker. Prostasomes are unique microvesicles of endocytic origin with a unique lamellar membrane composed of cholesterol and phospholipids known to be capable…
Many types of microsystems and microelectromechanical systems (MEMS) devices exhibit improved performance characteristics when operated below room temperature. However, designers rarely pair such devices with integrated cooling solutions because they add complexity to the system and often have power consumption which…
Inverter-fed motors may experience premature failures due to the abnormal (if compared with 50/60 Hz sinusoidal voltage) stress profiles that voltage impulses induce in the insulation system. This paper will briefly recall the reasons for these failures, focusing on the key role of partial discharges in wire-wound ins…
This study describes the development of a preparation technique for silver nanoparticles useable as antimicrobial material which is especially useful for textile treatment to realize antimicrobial fabrics. The silver particles need to be prepared by reduction of AgNO 3 under moderate conditions and with a moderate and…
Thermal properties of oxygen-, phosphorus-, and halogen-free dimethylgold(III) diethyldithiocarbamate complex (CH 3 ) 2 AuS 2 CN(C 2 H 5 ) 2 (gold, dimethyl(diethylcarbamodithioato -S,S′)-) having excellent storage stability and the mechanism of its decomposition to elemental gold were studied. Saturated vapor pressur…
Hydrophobic surfaces created by the adsorption of a monolayer of surfactants, such as CTAB or DODAB, to mica display long-range mutual attraction when placed in water. Initially, this attraction was considered to be due to hydrophobic interaction, but more careful measurements using AFM showed that the surfactant mono…
In this paper, PIMNT/epoxy 1-3 composites with different volume fractions were prepared by the dice-and-fill method for application in ultrasonic transducers. The theoretical and experimental properties at different volume fractions and the temperature stability of the electromechanical property were investigated. The…