Materials Literature
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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…
Orthorhombic HoMnO3 films with well-aligned crystallographic orientations were deposited on LaAlO3(110) single crystal substrates by using pulsed laser deposition. The nearly perfect b-axis-oriented films provide the opportunity of investigating the orientation-dependent physical property of this material. The tempera…
Abstract A new type of polymeric hybrid coating is created by layer‐by‐layer deposition of polyelectrolyte multilayers (PEM) onto nano‐patterned polymer brushes (NPB). The PEM is a hydrogen‐bonded multilayer consisting of poly(acrylic acid) and poly(acrylamide) and the NPB is derived from a surface reactive rod‐coil b…
Abstract In the present study, an icosahedral single phase bulk quasicrystalline material based on Al 62 Cu 25.5 Fe 12.5 has been synthesised by a spray forming route. Microstructural characterization showed an average grain size of 10 μm. The oversprayed fine powder showed the presence of β - and λ -phases, whereas,…
Abstract A simple 5‐chloro‐7‐iodo‐8‐quinolinolato‐manganese(III) complex with the feature of pH‐regulated molecular switches was conveniently synthesized and found to be a novel and highly efficient catalyst for the epoxidation of olefins with aqueous hydrogen peroxide in water‐acetone media containing ammonium acetat…
A method is proposed to modulate phase using variant square holes in a metallic film based on a fundamental mode approximation model. Phase retardation through square holes in a subwavelength scale in a thin metal film has been analyzed and calculated. Based on the model, a structured lens with a numerical aperture of…
Abstract A water‐soluble chitosan derivative namely, N ‐(2‐hydroxy) propyl‐3‐trimethylammonium chitosan chloride (HTCC) was synthesized by the reaction of chitosan with glycidyltrimethyl ammonium chloride in a neutral aqueous condition and solution blended with polyacrylonitrile (PAN) in an organic solvent. Polymeric…
Monitoring the kinetics of hydrolysis and condensation of γ-glycidoxypropyltrimethoxy-silane (γ-GPS) was carried out by NMR spectroscopy (29Si–, 13C–, and 1H–). The course of these reactions was followed in 2 wt% aqueous dilution conditions (26% D2O/74% H2O), pH 5.4, and temperatures of 26, 50, and 70°C. At ambient te…
Abstract The present work provides a critical review of polymer crystallization studies using SALS; experimental methods, analysis techniques, observations and their relations with respect to other techniques are discussed. Furthermore, the fact that nucleation might be accompanied by large scale density fluctuations…
We herein report an anomalous thermal hysteresis in dielectric permittivity in CaCu3Ti4O12. The anomalous behavior was well explained in terms of the low-temperature Maxwell–Wagner relaxation induced by frozen carriers. A multirelaxation mechanism, i.e., the coupling of the dipole relaxation to the frozen carrier-indu…
The stress evolution in nanocrystalline diamond (NCD) films deposited at different temperatures (from 800to400°C) was investigated. Results showed that the intrinsic stress gradually changed from tensile to compressive with decreasing deposition temperature. Most importantly, the intrinsic stress can be tailored to ze…