Materials Literature
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A high triplet energy (ET = 3.2 eV) electron transporting/hole blocking (ET/HB) material, 1,2,4,5-tetra(3-pyrid-3-yl-phenyl)benzene (TemPPB) with a super twisted structure and high thermal stability has been synthesized. An external quantum efficiency (EQE) of 19.6% was achieved by using TemPPB as the ET/HB material i…
Hydrosilylation provides a route to form substituted silanes in solution. A similar reaction has been observed in the formation of covalent organic monolayers on a hydrogen-terminated silicon surface and is called thermal hydrosilylation. In solution, the mechanism requires a catalyst to add the basal silicon and satu…
A macrocyclic exTTF host for fullerenes offers control over the electronic coupling between an electron donor and an acceptor, and stabilizes the charge separated state lifetimes into the range of 500 ps.
La nanoindentation est une technique de caractérisation bien adaptée pour déterminer les propriétés mécaniques des couches minces. Cependant, pour des couches d’épaisseur de quelques centaines de nanomètres, le substrat et les couches sous-jacentes sont sollicités et les mesures ne sont pas reliées de façon simple aux…
Influence of substrate bias voltage on temperature conditions, formation stages, structure formation processes and prevailing orientation of titanium nitride films in the course of electric-arc evaporation was investigated. Increase in substrate bias voltage was found to accelerate considerably the formation stages of…
We propose a microsystem integration technique that is ideal for low-cost fabrication of vibration energy harvesting sensor nodes. Our approach exploits diverse uses of sol-gel deposited lead zirconate titanate, effectively combining fabrication of several microsystem components into a single process and significantly…
The difference in corrosion behavior between alumina-spinel and alumina-magnesia castables in a steel slag was investigated with emphasis on the composition of spinel phase. The spinel primarily-added to the alumina-spinel castable had the stoichiometric composition, whereas the spinel forming secondarily in the alumi…
Perfect absorbing metamaterial based on model of metallic dendritic cell is fabricated. A S-wave band microstrip antenna with perfect absorbing metamaterial substrate is proposed. The results show that compared to the conventional microstrip antenna, the performance of the novel microstrip antenna with perfect absorbi…
Abstract: The purpose of this work was to obtain samples of CL-20 by precipitation process in a solvent/nonsolvent system, under variable process parameters such as: antisolvent kind, time of nonsolvent addition, stirrer speed, mass of seeded crystals of ε-CL-20. Received samples were studied in the aspect of their se…
The problem of the additional phonon modes (APM) of the far infrared spectra in the range of 100-115 cm -1 for the Hg1-xCdxTe alloys has been discussed for the last forty years. The model of two well potential of the mercury atoms in the Hg1-xCdxTe lattice is proposed for interpretation of these APM. Analysis was perf…
The synthesis of metal nanoparticles using biological systems is an expanding research area due to the potential applications in nanomedicines. Nanoparticles synthesized by chemical method is not eco-friendly. The biological synthesis of silver nanoparticles is convenient and extracellular method, which is environment…
This paper presents the voltage-quality requirements set by the Swedish energy regulator. Requirements have been set for harmonics, unbalance, slow voltage variations, voltage dips, voltage swells and rapid voltage changes, which are all discussed in this paper. This paper further discusses recommended measurement met…
The calculations of electrical field distribution and the interface pressure are the foundation of high voltage cable accessories design.The accuracy of the calculations will impact the performances of the designed cable accessories.There are many interfaces in all kinds of cable accessories.Among these interfaces,the…
The effect of addition of Nb and Ti also cold rolling and annealing treatment on mechanical properties and microstructure of a twinning induced plasticity (TWIP) steel have been investigated. The results indicated that addition of Nb and Ti enhances strength. Also it is considered in the case that deformation twinning…
The inductance and the flux linkage excited by the permanent magnet(PM) are largely influenced by the saturation of permanent magnet synchronous motor(PMSM),and the air gap flux excited by the PM often contains large amount of space harmonics.However,the traditional linear mathematic model of PMSM cannot reflect the e…
Helicobacter pylori infection is virtually always associated with duodenal, peptic and gastric ulcers and promotion of gastrointestinal cancer. Some of medicinal plants traditionally have been used for gastrointestinal problems. In the present work, the inhibitory effect of the essential oils of some medicinal plants…
Recent development of Electrically-Assisted Manufacturing processes proved the advantages of using the electric current, mainly related with the decrease in the mechanical forming load and improvement in the formability when electrically-assisted forming of metals. The reduction of forming load was formulated previous…
Fullerenes are closed−cage carbon molecules formed by 12 pentagonal and n/2 – 10 hexagonal faces, where n is the number of carbon atoms. Patrick Fowler in his lecture in MCC 2009 asked about the Wiener index of fullerenes in general. In this paper we respond partially to this question for an infinite class of fulleren…
In this paper, constraint effect on ductile fracture initiation and propagation has been studied. Three-dimensional finite element analyses of mismatched welded joints made of high strength steel, have been performed for centre-cracked tensile (CCT) specimens. Different weld widths and material mismatching ratios have…
To meet the demands of increasing freight axle loads and cumulative gross tonnages, and high-speed passenger rail development in North America, the performance and service life of concrete railway crossties must be improved. According to a railway industry survey conducted by the University of Illinois at Urbana-Champ…