Materials Literature
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In recent years, there has been growing interest in the design of electron accelerators in order to reduce beam emittance and to increase photon brilliance (from third-generation synchrotron sources to free electron lasers). This has increased the coherent properties of the beam and has opened up new branches of micro…
This paper reports the fabrication of conductance-based gas sensors based on horizontal, dense carbon nanotube (CNT) arrays directly integrated between metal electrodes via a selective and directional catalytic growth process performed insitu and at the wafer-scale. We originally propose to use a functionalization str…
Chemistry and nuclear physics represent one of possible options of large area for practical data mining applications. Radio-active nuclides are related with many sectors, such as medicine or industry. Successful detection and identification of radio-nuclides allows the realization of specific safety precaution and the…
Abstract The complexes of poly(ethyl methacrylate-co-N-vinyl-2-pyrrolidone) (P(EMA-co-VP)) gel with poly- (ethylene glycol) (PEG) stabilized by the hydrogen bonds were prepared. It was found that both the concentration and the molecular weight of PEG have a strong effect on the P(EMA-co-VP) gel. When PEG was introduce…
Abstract The paper presents the results of the synthesis of 2,6-dimetyhlphenol (26DMP) from o-cresol. The target compound is an important substrate for polymer chemistry. Due to a large amount of o-cresol which is generated as a by-product, during the synthesis of 2,6-dimethylphenol from phenol, the methylation of o-c…
Resistive switching properties of multiferroic BiFeO3and YMnO3thin films grown by pulsed laser deposition technique have been investigated. Both material systems sandwiched between Au top and Pt/Ti bottom electrodes reveal nonvolatile resistive switching upon application of an electric field. BiFeO3is switching in bip…
Superabsorbent polymer from waste polystyrene-graft-polyacrylamide was synthesized through emulsion polymerization technique using acrylamide as a monomer and potassium persulphate as an initiator in the presence of N,N-methylenebisacrylamide (NMBA) as a crosslinking agent. The effects of acrylamide loading was invest…
An experimental study of oxidation of nano aluminum (Al) powders in CO2 and O2 is described. The oxidation is studied using thermogravimetric (TG) measurements from room temperature to 1500°C. Partially oxidized samples are recovered and their compositions are analyzed using X-ray diffraction. The oxidation product mo…
sup>57Fe-enriched BiFeO3 (BFO) thin films were fabricated on SiO2/Si substrates from a stoichiometric precursor solution by chemical solution deposition process. The Bi/Fe molar ratio of the thin films decreased from 0.95 to 0.80 with increase in the sintering temperature. A perovskite phase and flat surface were obta…
Xiangyang Shi and co-workers show on page 1267 that the unique combination of dendrimer chemistry and carbon nanotubes allows the generation of multifunctional nanodevices for high-payload encapsulation of a model anticancer drug doxorubicin with pH-responsive release behavior and targeting specificity, providing an e…
In power microelectronics, the trends towards miniaturization and higher performances result in higher power densities and more heat to be dissipated. For large systems, the associated thermal architecture is becoming more and more complex and costly. In most electronic assembly, thermal interface materials (TIM) help…
The three magnetization modes in which the magnetization region is shifted according to load based on a linear torque equation are proposed. Efficiency comparison test of the proposed method and a voltage PWM control method is conducted with a real system.
New coordination compounds of Cu(II) and hydrazones of nicotinic and isonicotinic acids have been prepared. The complexes isolated have been studied by elemental analysis, thermogravimetric analysis, magnetic susceptibility measurements, IR, diffuse reflectance, and EXAFS spectroscopy. The geometry of the compounds ha…
Pneumatic splice makes use of high-speed compressed air as the driving force to complete the yarn splicing, noticing that the change of the vent pressure has a significant effect on yarn splicing. This paper studies the impact of vent pressure on the quality of yarn splicing when twisting and untwisting. Modeling, ana…
There have been tremendous researches on carbon nanotubes (CNTs) and CNTs reinforced composites due to their excellent mechanical, electromagnetical and thermal properties. Radially aligned multi-walled CNTs grown in situ on the surface of carbon fiber or its woven fabric by the chemical vapor deposition method not on…
Extraction with ionic liquids joined with adsorption and catalytic oxidation composed with commercially available tungsten carbide, 30% H2O2 and 1-n-octyl-3-methylimidazolium hexafluorophosphate ([omim]PF6) could achieve the ultra-deep removal of dibenzothiophene (DBT) in model oil. In the case of the system increased…
A diamond polycrystalline composite material with improved physico-mechanical characteristics has been obtained at high pressure and temperature using nickel and cobalt powders and tungsten carbide nanopowder as sintering aids. Samples of this material reinforced with CVD polycrystalline diamond at high pressure and t…
A tunable narrow band filter based on a Bragg grating with surface plasmon polaritons is developed and investigated numerically by using the finite-difference time-domain method. A defect state with narrow transmission peak (about 15 nm) is shown to appear in the bandgap by introduction of a defect into the Bragg grat…
The formation of guest-host complexes of a gaseous radical TEMPO with cyclodextrins bound to the silica microspheres (MSs) either covalently with a chemical linker or by physical adsorption has been investigated. For the former complexes, two conformational states with strongly different rotational mobilities have bee…
A new approach was developed to predict the statistical distribution of residual flexural strength of composite structures subjected to low velocity impact. Based on the assumption that the flexural strength of unimpacted structures follows the two-parameter Weibull distribution, the model was formulated as a function…