Materials Literature
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In this paper, the temperature dependence of the hysteretic processes of Co nanowires, squarelly ordered in an array prepared by electrodeposition in nanopores of alumina membranes was analyzed. Both the magnetostatic interactions induced in the nanowires arrays and the thermal stresses (radial, azimuthal and axial st…
Abstract Gelatin multilayers were assembled on PLLA substrate at pH 3, 5, and 7, which was below, around, and above the isoelectric point of the amphoteric polymer, using the layer‐by‐layer assembly technique. The multilayer deposition on the PLLA substrate was monitored by X‐ray photoelectron spectroscopy (XPS) and w…
Piliostigma reticulatum (DC) Hoechst (Leguminosae) is an evergreen shrub reputed to possess a number of medicinal properties. The methanolic extract of Piliostigma reticulatum root (Leguminosae) was evaluated for anti-diarrhoeal activity in rats using castor oilinduced diarrhoea and fluid accumulation and activated ch…
Fundamental understanding of the role of Ni additives in promoting the dehydrogenation mechanism of hydrogen desorption in zinc borohydride [Zn(BH4)2] is a key factor for using this material in hydrogen storage. A systematic theoretical study of the energetics and hydrogen dynamics was carried out to understand this d…
Abstract Complex cubic compounds Zn 6 Sc and Cd 6 M (M = Yb, Ca, Y, rare earth) are approximant crystals of Zn- and Cd-based quasicrystals. A low-temperature structural transition has been observed for these compounds universally and is considered to be due to orientational ordering of an atomic shell in the icosahedr…
This paper provides information on laboratory performance of 15 and 35 kV premolded joints from three manufacturers. Data on partial discharge, ac and hot impulse voltage breakdown tests, and dissection of breakdowns are presented for joints that were tested immediately after their assembly and after one year aging im…
Abstract A novel poly(aryleneethynylene), in which the main chain and the tetrathiafulvalene (TTF) side chains are coplanar, has been prepared and characterized. The polymer can self‐assemble in tetrahydrofuran (THF) and the π‐extended coplanar backbones adopt good face‐to‐face stacking, which is confirmed by X‐ray di…
A novel processing method, that is, solid state shear milling (S3M), was adopted to compound high loading inorganic flame-retardant magnesium hydroxide with polyamide 6 by using our self-designed pan-mill equipment. S3M can effectively pulverize PA6, increase the interfacial interaction of the resin and magnesium hydr…
We suggest, based on the principle of causality and for a material exhibiting adjacent absorptive and gain resonances, that there can be an intervening frequency where perfect imaging is in theory possible. At this frequency, both the dielectric constant and the permeability are negative, leading to a negative refract…
Her mit den kleinen InP-Partikeln! Eine Coreduktion liefert InP-Nanokristallkolloide hoher Qualität. Die Synthese nutzt PCl3 als Phosphorquelle und Superhydrid als Reduktionsmittel. Mit HF angeätzte nicht vorbehandelte Nanokristalle zeigen eine effiziente Photolumineszenz. Das Verfahren kann auf andere Pnictogenhaloge…
A straightforward and inexpensive solution-based method to coat cylindrical microcavities with silicon nanocrystals is described. By using this method, high-quality films of oxide-embedded silicon nanocrystals (Si-ncs) were formed on the inner wall of hollow glass fibers. The resulting films were uniform and crack-fre…
Abstract We report on a DC magnetic field sensor that utilizes magnetoelectric (ME) laminate composites. It consists of a ring‐dot piezoelectric transformer laminated to a magnetostrictive disc. When a constant voltage is applied to the ring section of the piezoelectric layer at resonance, a stress is induced in the d…
Many studies on the thin film/substrate structure and its failure mechanism were reported in recent years. The direct experimental results of thin film/substrate structure by scanning electron microscopy presents an intriguing problem: there exists a buckling failure mechanism at the lateral edge of metal film under p…
Multilayered metal-insulator-metal structures with BiFeO3 and Ba0.25Sr0.75TiO3 thin films were fabricated by chemical solution deposition to reduce the leakage current through the capacitor stack. The Ba0.25Sr0.75TiO3 layer does not influence the crystalline structure of BiFeO3 and was recognized as rhombohedral by Ra…
In this letter, the excitonic emissions from ZnO epilayers were studied by depth-resolved cathodoluminescence (CL) microanalysis. An excellent agreement between the redshift of the experimental depth-resolved CL emission and theoretically simulated values was observed, which clearly identified its origin to be the str…
The conductor and ground shield layers of shielded distribution cable provide a smooth interface between conductors and insulation. Their semiconducting nature causes attenuation of high frequencies which propagate down the cable, as the high frequency displacement current flows through the shield layers and, in the c…
Deutlich schneller als bei thermischer Aktivierung verläuft die cis-trans-Isomerisierung eines Azobenzolderivats nach Anlegen eines schwachen statischen elektrischen Felds (siehe Bild). Dazu muss die Verbindung in einer Flüssigkeit (im Beispiel Benzonitril) oder einem Flüssigkristall gelöst sein, der Zusatz eines Hilf…
By the study of a series of molecular liquids of fragilities covering almost the entire known range by the mechanical spectroscopy of quantitatively monitoring the healing of stress-induced microcracks recently developed by W. H. Wu et al. [Appl. Phys. Lett. 92, 011918 (2008)], we show that the cracking healing temper…
The corona pattern from porcelain insulator strings on high voltage (HV) transmission lines has been investigated for inspecting faulty insulators on-line. Corona patterns from HV conductive line, metal accessory, and discharge patterns from bad connection, power stations, have also been studied for background pulse n…
MgO is an important inorganic material, which can be used in many aspects, such as catalyst, toxic-waste remediation agent, adsorbent, and others. In order to make use of MgO, nano-MgO was prepared by ultrasonic method using Mg (CH3COO)2.2H2O as precursor, NaOH aqueous solution as precipitant in this paper. Effect fac…