Materials Literature
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To reduce polarization of electrochemical capacitor based on carbon nanotube, titanium oxide nanoparticles were deposited by ultrasound. The pore distribution of <TEX>$TiO_2$</TEX>/CNT nanoparticle exhibited surface area of <TEX>$341\;m^2g^{-1}$</TEX> when <TEX>$TiO_2$</TEX> content was 4 wt %, which was better than t…
The ultraviolet (UV) laser irradiation (248 nm) of monocrystalline wurtzite ZnO with 450 fs pulses results in surface modification. A formation of two orthogonal ripple structures with a period of 400-500 nm was observed oriented parallel and perpendicular to the laser beam polarization. The UV exciton emission obtain…
Hot pressed coupons of composition ZrB -20 v% SiC -5 v% TaSi 2 and ZrB 2 -20 v% SiC -20 v% TaSi were oxidized in stagnant air at temperatures of 1627 and 1927°C for one, five and ten 10-minute cycles. The oxidation reactions were characterized by weight change kinetics, x-ray diffraction, and SEM/EDS. Detailed WDS/mic…
Purpose The purpose of this paper is to show that a new size labelling system based on the data gathered by [TC] 2 in the S ize USA, Let's Size up America survey would better serve the female population than the system currently in use. Design/methodology/approach Based on previous research conducted on [TC] 2 data an…
Purpose The purpose of this paper is to present short characteristics of shape memory alloys (SMA) and shape memory polymers (SMP) and some examples of application of these materials in industrial sealing technology. Design/methodology/approach In this paper, short characteristic of shape memory materials and design e…
<title/>Copper is widely used in many applications such as heat exchangers, condensers, heating and air conditioning systems, electricity, electronic circuitry and ornamental parts. This paper reviews the issue of copper corrosion in different environments and applications. Special attention is paid to the influence o…
A series of pyridine based Schiff bases (3-MAPDHB, 4-MAPDHB, and 6-MAPDHB) which differ from each other by the position of methyl group were synthesized. Obtained Schiff bases were converted to their polyphenol species (P-3-MAPDHB, P-4-MAPDHB, and P-6-MAPDHB) by oxidative polymerization reaction (OP) using NaOCl as th…
Specimens of sensitized type AISI 304 stainless steel were subjected to constant load and exposed to an aqueous sodium thiosulphate solution . Intergranular stress-corrosion cracking was monitored simultaneously for electrochemical noise, acoustic emission , and specimen elongation. A section of the gauge length was m…
We present a theory for surface polaritons on ferroelectric-antiferromagnetic materials with canted spin structure. Canting is assumed to be due to a Dzyaloshinkii-Moriya interaction with the electric polarisation and weak ferromagnetism directed in the plane parallel to the surface. Surface and bulk modes for a semi-…
Auf Wunsch Entspiegelung: Die Entspiegelungseigenschaften eines nanoporösen Überzugs, der aus Nanopartikel aus einem schichtförmigen Doppelhydroxid und Polyanionen aufgebaut wurde, ändern sich reversibel beim Schalten zwischen porösem und nichtporösem Zustand durch Kalzinieren und Rehydratisieren.
The anomalous Hall effect (AHE) around the flux state in square double-exchange model is investigated. By introducing the lattice distortion and local chirality, the system can break the parity symmetry and time-reversal symmetry spontaneously, and thus generate a topological nontriviality in the band structure associ…
Charge ordering phenomena in overdoped La1-xCaxMnO3 (LCMO) manganites with x>or=0.5 are generally believed to be associated with the formation of charge stripes composed of alternating Mn3+ and Mn4+ charges. However, a number of recent experiments indicate that instead of stripes the charge in these systems is spatial…
We discuss glass as an engineered material in its traditional role to control the propagation of and to spectrally modify light in the performance of optical functions. Next, we consider fluorescence, which provides the capability to convert absorbed light of a particular frequency to emitted light of a lower frequenc…
The structural and electronic properties of poly(3,4-phenylenedioxythiophene) and poly(3,4-ethylenedioxythiophene) have been studied using quantum mechanical methods. Calculations have been performed considering a series of oligomers up to 12 repeating units in the neutral and cation states, results being used to extr…
Toward obtaining a more detailed understanding of the influence of SO x poisoning on the mechanism of NO x uptake on a NO x storage and reduction (NSR) catalyst, we have performed a model study under ultrahigh vacuum (UHV) conditions. A supported model catalyst based on a thin well-ordered alumina film grown on a NiAl…
This article covers a method for synthesizing biodegradable high-alkali magnesium oleate detergent with a total base number (TBN) value of 256 mg KOH/g. The biodegradable, environmentally friendly high-alkali magnesium oleate detergent was synthesized using oleic acid and magnesium oxide (Light) as raw materials. Reac…
The kinetics of thermal desorption of five soot-bound nonvolatile (C(22), C(24)) polycyclic aromatic hydrocarbons (benzo(ghi)perylene (BghiP), indeno(1,2,3-cd)pyrene (IdP), anthanthrene (Antha), dibenz(ah)anthracene (DBahA), dibenzo(ae)pyrene (DBaeP)) identified in laboratory-generated kerosene soot were studied over…
Abstract Polarized Fourier transform‐infrared (FT‐IR) reflectance spectra and powder Raman spectra have been measured for 1,3‐dinitrobenzene crystal in order to revise the assignments of bands by means of the oriented gas model reinforced with quantum chemical [density functional theory (DFT)] calculations. Longitudin…
The properties of nanocomposite materials depend on the dispersion of the nanoparticles/nanofibers within the matrix. The addition of surfactants and varied processing techniques are used to increase the dispersion of the nanoparticles in the final composite. A method for the quantitative prediction of the interaction…
The present work investigates the implementation of molten carbonate fuel cells (MCFCs) for power generation from landfill biogas, coupled to the on-site production of hydrogen for vehicle-fueling purposes. The system modeling of the plant has been performed in steady-state conditions, with the aim of assessing the ov…