Die Chemie übernimmt wieder
Abstract Seit Beginn des Jahres steigen Anzahl und Wert der Deals pro Quartal. Asiaten sind immer häufiger als Käufer oder Verkäufer bei grenzüberschreitenden Transaktionen vertreten.
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SSRL Sixth Annual School on Synchrotron X-ray Scattering Techniques in Materials and Environmental Sciences
Synchrotron-based X-ray scattering (SR-XRS) techniques offer the ability to probe nano- and atomic-scale structures that dictate the properties of advanced technological and environmental materials. Important materials studied at the Stanford Synchrotron Radiation Lightsource (SSRL) include organic and inorganic thin…
Determination and Analysis of the Order of Stress in a Homogeneous Field
In a structure the presence of a geometric discontinuity of order or material reduces significantly its lifetime. Indeed, it is at these areas that the stress field is strongly disturbed and can reach very high critical levels resulting a damage process. The analysis of these unique areas can not only achieve an optim…
Impact of initial conditions on hysteretic behaviour of the boost converter
The different steady-state responses of a boost converter are observed during measurements carried out on the physical model of the chosen boost converter. It is shown that by varying the input voltage only, the boost converter exhibits hysteretic behavior. The various set of steady-state responses are recognized by i…
Behavior of Formate Adsorbed on Cu(110) When Exposed to Hydrogen Gas
Abstract The behavior of formate adsorbed on Cu(110) surface exposed to hydrogen gas was investigated at 300–330 K. Although an exchange reaction from D–COO(a) to H–COO(a) was observed after exposing a DCOO(a)-covered Ni(110) surface to H2 in a previous report, this did not occur with Cu(110). The preadsorbed DCOO(a)…
Electrical Performance of Amorphous SiZnSnO TFTs Depending on Annealing Temperature
The dependency of annealing temperature on the electrical performances in amorphous silicon-zinc-tin-oxide thin film transistors (SZTO TFT) has been investigated. The SZTO channel layers were prepared by using radio frequency (RF) magnetron sputtering method with different annealing treatment. The field effect mobilit…
Effects of Substrate Temperature on the Properties of Silicon Oxide Films by PECVD
Under different growth conditions, silicon Oxide (SiOx) thin films were deposited successfully on Si (100) substrates and glass substrates by plasma enhanced chemical vapor deposition (PECVD). The thickness, refractive index and growth rate of the thin films were tested by ellipsometer. The effects of deposition tempe…
Quantum dots for lasers and light-emitting diodes
Self-organized quantum dots (QDs) applied to light-emitting devices extend their spectral range, temperature stability and allow new approaches including single photon emitters and multi-wavelength lasers and light-emitting diodes.
Microbump development on small bump pitch (50μM and lower)
Further miniaturization of electronic systems by 3D technologies has increased interest in the semiconductors community. Device scaling has become exponentially challenging. One of the challenges for fine pitch Cu/Sn stacking is to obtain high bump uniformity. Enhanced electroplating of microbumps is shown when platin…
The Microstructure and Performance Analysis of HRB400 Rebar Manual Arc Welding Joints with Rebar Materials in Civil Engineering
Manual arc welding is widely used in all kinds of welding material in the civil engineering because of their stable performance characteristics. Based on the analysis of the incision morphology, microstructure and hardness distribution of different kinds of welding joints by manual arc welding methods, how the differe…
The effectiveness of low-emissivity coating on a polymer film
This work describes the effectiveness of low-emissivity (low-E) coating on the polymer film with TiO2/ZnO:Ga/Ag/ZnO:Ga/TiO2structure and the results of heat monitoring. The characteristics of the coating which determine the reduction of heat loss by the low-E coating are given. Also the results of efficiency calculati…
Fabrication and characterization of Cu pellet using Powder Metallurgical method
Pure Cu is prepared using by Powder Metallurgical (PM) method in order to study the impact of different sintering environment (with vacuum, N2and N2+ H2) and at different temperatures (1010 °C and 1080 °C) towards its surface and inner morphology, crystal structure and electrical properties. These samples are compacte…
Nanopowders of lanthanide ferrites and aluminates for production of ceramics
Nanopowders of lanthanide aluminates and ferrites were obtained by aqueous combustion synthesis. Scanning electron microscopy and specific surface area measurement made clear that the morphology and size of powder particles depended on the glycine: nitrate ratio in the initial mixture. The obtained powders consisted o…
Morphology and performance of silane functionalized organoclay in polypropylene matrix
In this work the morphology and performance of silane functionalized organoclay in PP matrix was investigated. For this purpose MMT/Silane intercalates were prepared using the grafting method. First nanofillers were dispersed in a mixture of ethanol/water solution, and then different silanes were added into the mixtur…
Triggering characteristic of TVS and its application research in synthetic making test for high voltage circuit-breakers
Triggered vacuum switches (TVS), have found fast growing applications in the field of power system and pulse power. The key to perform synthetic making test at full rated voltage for high voltage switches is the making device of current source, so the chief aim of this research is to investigate the triggering feature…
Synthesis, structure and luminescence properties of lanthanide compounds grown from phosphate-molybdate molten systems
The main crystallization trends of complex oxide compounds of lanthanides from alkaline phosphate-molybdate (tungstate) melts have been studied in light of structure - luminescence properties relationships. The regions of formation MI3Ln(PO4)2, LnPO4, K2Ln(PO4)(MVIO4), MIMIII(MVIO4)2from self flux systems MI-P-Ln-O (M…
Polarization characteristics of extraordinary microwave transmission through conductive films
The polarization properties of extraordinary microwave transmission through perforated duralumin films are investigated both theoretically and experimentally. It is shown that resonance wavelength at which transmission efficiency reaches maximum value depends on the incident radiation polarization.
Infrared dielectric properties of the nonlinear optical crystal BaTeMo2O9
The dielectric function of the IR nonlinear optical crystal BaTeMo2O9is obtained by performing a Kramers-Kronig transformation from the measured infrared reflectivity. With the assistant of first principle calculation, the phonon modes are assigned, which is fundamental to confirming the SOJT distortions.
Computer simulation of carbon nanostructures
In the work we develop programs for computation of the system of atoms at every step and visualization of that data, also we research of thermodynamic properties and conditions of formation of different carbon nanostructures, try to predict existence of new materials. Nowadays we have two separate programs: one for co…
The Investigation of Metamaterials by Measuring the Power of Transmission in the Terahertz Regime
We present the design and fabrication of metamaterials, and investigated the power transmission properties of the metamaterials in the frequency ranging from 1.04THz to 4.25THz. The measured results reveal a global maximum transmission peak at 2.52THz. We compared measured power transmission performances of four types…