Materials Literature
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Cobalt ferrite nanoparticles of different sizes are prepared by varying the concentration of Co 2+ metal ions using precipitation approach. The average crystallite size, coercivity ( H C ), and saturation magnetization ( M S ) increases from 11 to 16 nm, 0.12 to 0.8 kOe, and 28 to 52 emu/g, respectively, as Co 2+ ion…
Shape-memory alloys, such as Ni-Ti and Cu-Zn-Al, show a large reversible strain of more than several percent due to superelasticity. In particular, the Ni-Ti-based alloy, which exhibits some ductility and excellent superelastic strain, is the only superelastic material available for practical applications at present.…
A new synthetic route to mononitrated oligothiophenes is described, as well as the preparation of halogenated derivatives (Br, I) thereof. An unusual deep red colour is observed and explained, with the aid of DFT calculations, as arising from a significant quinoidal contribution to the molecular structure. The crystal…
Shape Memory Alloys (SMA) have proven to be a lightweight, low cost alternative to conventional actuators for a number of commercial applications. Future applications will require a more complex shape changes and a detailed understanding of the performance of more complex SMA actuators is required. The purpose of this…
Both discrete and continuous approximations are employed to determine the join structure involved in the novel carbon nanostructure formed from a C60 fullerene and a carbon nanotube, namely a nanobud. First, following the methodology of the authors' previous work, using a least squares minimization procedure, discrete…
Supramolecular biomaterials were prepared based on the formation of partial inclusion complexes between alpha-CD and poly(epsilon-caprolactone) (PCL). Enzyme-catalyzed degradation of these partial alpha-CD-PCL inclusion complexes was investigated at 37 degrees C in the presence of lipase from pancreas porcine. The bio…
Abstract Structural dynamics of the layered CuCrS 2 is investigated for the first time by using the Raman scattering method in 78–295 K temperature range on the samples synthesized by different methods. The Raman and IR spectra of CuCrS 2 were simulated within the valence force field model with the LADY program. The r…
Polarization gratings can be realized by polarization holographic recording in photoanisotropic materials. In this paper, we study two types of polarization gratings. One is recorded with two orthogonally circularly (OC) polarized beams and the other one with two orthogonally linearly (OL) polarized beams. The interfe…
A study on the direct gas phase oxidation of benzene to phenol over a Pt-VO x /SiO 2 catalyst was carried out in both a conventional fluidized bed reactor (FBR) and a two-zone fluidized bed reactor (TZFBR). For this purpose, Pt-VO x /SiO 2 catalyst was synthesized by a method based on two consecutive impregnations. In…
Spiders spin a variety of task-specific silk fibers, each composed of one or more unique proteins synthesized within specialized glands in the spider's abdomen. Tubuliform glands are the source of the large diameter silk fibers used by many species in the construction of egg cases. Unlike other silk glands that synthe…
Carbon nanotubes (CNTs) have many potential applications due to their unique structural, physical and electronic properties. Arc-discharge in liquid method is developed to synthesize many kinds of nanocarbon structures. This technique is considered a low-cost method. Here, a full-automatic arc-discharge set-up was use…
Redox-Induced Reversible Conformational Switching of Poly(aniline sulfonic acid) with Transition Metals in Aqueous Solution
We report a new patterning method for single-walled carbon nanotubes (SWCNTs) films on flexible, transparent poly(ethylene terephthalate) using electrochemical etching in an aqueous electrolyte solution. Electrochemical etching of the SWCNT films patterned with photoresist polymer was accomplished in a three-electrode…
Due to their robust structure, low and constant starting current, constant torque, and smooth and noiseless operation, small- and medium-sized power rating hysteresis motors are commonly employed in high-speed applications. However, hysteresis motors, in general, have a comparatively low power factor, efficiency, and…
Poly( N -methylaniline)/Zn 0.6 Mn 0.2 Ni 0.2 Fe 2 O 4 (PNMAn/ZMNFO) composites were prepared by in situ polymerization. The structure, morphology, and electromagnetic properties of the samples were characterized by X-ray diffractometer, thermal analyzer, infrared spectrometer, scanning electron microscopy and transmis…
The atomic and electronic structures of the (010) surface of the $\mathrm{T}{\text{-Al}}_{3}$(Mn,Pd) complex metallic alloy is investigated by means of low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), x-ray and ultraviolet photoelectron spectroscopy (XPS and UPS), x-ray photoelectron diffra…
Local lattice and electronic structures in the Fe-As layer of ${\text{SmFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ superconductors were studied by x-ray absorption spectroscopy, the $\text{Fe}\text{ }K$-edge and the $\text{As}\text{ }K$-edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-struc…
A rapid and simple approach to fabricate a large area of nanostructured substrate for surface-enhanced Raman scattering (SERS) is reported. Gold nanoparticles ranging from 10 to 40 nm in diameter uniformly distributed on a silicon substrate were obtained by annealing the gold film precoated on the silicon substrate wi…
All conventional viewing angle switchable liquid crystal displays with pixel division have drawback in light efficiency because the sub-pixel that controls viewing angle does not transmit the incident light at normal direction. In this paper, we propose new viewing angle controllable homogeneously aligned liquid cryst…
Alternating meta - and para -phenylene-linked oligoarylamines are considered as promising molecular parts for the molecule-based electronics and/or spintronics due to their intriguing electronic and magnetic properties. From the magnetic viewpoint, a -meta -phenylene linker plays a crucial role in ensuring the effecti…