Materials Literature
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We showed directional adhesion on the superhydrophobic wings of the butterfly . A droplet easily rolls off the surface of the wings along the radial outward (RO) direction of the central axis of the body, but is pinned tightly against the RO direction. Interestingly, these two distinct states can be tuned by controlli…
The spectral and fluorescent properties of (bis-θ,θ′-dimethylaminopolyenyl)diketones were studied. It was found that the presence of two carbonyl groups in the diketone structure leads to a bathochromic shift of the absorption spectrum of the dye with respect to that of the corresponding compound with one carbonyl gro…
The grain growth kinetics of nanocrystalline copper thin film samples was investigated. The grain size of nanocrystalline copper samples was determined from the broadening of X-ray spectra. It was found that the grain size increased linearly with isothermal annealing time within the first 10 minutes, beyond which powe…
In this study we have characterized the mechanical and electrical properties of Bi 2 Te 3 thin films prepared by co-sputtering method. The film structure and morphology were revealed using the X-ray diffraction and scanning electron microscopy (SEM). Thickness of the deposited films was measured using SEM observation…
A novel coating technique, thermal pressure filtration of sol-gel paints (TPFSP), has been developed to prepare nano-/micro-composite ceramic coatings with controllable thickness, structure, and excellent high temperature properties. In this paper, the fabrication of two typical coatings, nano-/micro- Al 2 O 3 - Y 2 O…
The production of Equids in Europe is oriented towards sports and races which constitute the main economic activity. However, the preservation of old draft breeds of local horse populations and the growth in the population of asses in recent years are emerging fields. The main reason for this situation is the very dee…
Abstract Photoemission electron microscopy is used to probe photon‐induced oxygen vacancies generated on TiO 2 (110)‐(1×2) surfaces. An increased oxygen vacancy concentration within the irradiated region leads to an increase of local photoelectron emission. The local oxygen deficient region can be compensated by expos…
Abstract For the fabrication of ZnO NWs, we have used Si wafers as smooth surface substrates. Gold was deposited on to the substrates with an electron beam evaporator, since it is known that gold particles can serve as the catalyst to grow ZnO NWs on substrates in Vapor‐Liquid‐Solid (VLS) method. In the VLS method, th…
Concentrated regenerated silk fibroin (RSF) aqueous solutions with concentration close to that of the native silk fibroin (15.5%, 25.5% and 31%) were prepared. The effect of storage time and concentration on the conformational transition of the concentrated RSF aqueous solution was studied by Raman spectroscopy and ci…
Abstract We have studied the phase transition of bipolarons in Ti 4 O 7 by means of Raman spectroscopy. It is found that on warming across the phase transition, the Raman spectrum shows distinct changes, i.e., broadening of the linewidths, decrease in the phonon frequencies, and appearance of the fine structure. These…
The electronic properties of ${\mathrm{Y}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}\mathrm{Ti}{\mathrm{O}}_{3}$ $(x<0.2)$ solid solution are described using the state-of-the-art $\mathrm{LDA}+\mathrm{DMFT}$ method. It is shown that both structural distortions and multiorbital electron interactions are key aspects toward…
Abstract EPR spectra on a colorless single crystal of anatase titanium dioxide have sextuplet signals under irradiation of ultra violet (uv) light at temperatures of 100‐40 K. The sextuplet is assigned to a paramagnetic species of S = 1/2 interacting with I = 5/2. The angular dependence of the sextuplet signals reveal…
Macroscopic behavior of ferromagnetic materials can be considered as the resultant of three phenomena: hysteresis, eddy current, and excess loss. Hysteresis is the behavior of the material under quasi-static variation of magnetic field. Eddy-current and excess losses are dependent on the rate of field variation and ar…
A method to control magnetization reversal in magnetic films with perpendicular magnetic anisotropy was demonstrated in this study. Alloys of rare earth-transition metals (RE-TM) with their extremely large anomalous Hall coefficient and relatively large magnetostriction constants were suitable to observe the stress in…
A series of polycrystalline samples of ${\mathrm{Sr}}_{x}{\mathrm{CoO}}_{2}$ $(0.15\ensuremath{\le}x\ensuremath{\le}0.40)$ have been prepared by a low-temperature ion exchange technique. These ${\mathrm{Sr}}_{x}{\mathrm{CoO}}_{2}$ samples are isomorphic to ${\mathrm{Na}}_{x}{\mathrm{CoO}}_{2}$ with the hexagonal struc…
The photoluminescence intensity from ion-implanted silicon can be quenched by the radiation damage implicit in the implantation. Annealing is then required before the intensity of the luminescence from a defect center is approximately proportional to the concentration of that center. Data from positron annihilation an…
A lift-off method has been developed for the fabrication of polymer dispersed liquid crystal (PDLC) displays. A polymer matrix template can be prefabricated by lifting off a PDLC film from a fluorosilanized antisticking substrate. Desirable liquid crystal can then be backfilled/infiltrated into the template. Applying…
Transparent cobalt doped MgO–Ga2O3–SiO2 nano-glass-ceramic composites were prepared from Si, Ga, Mg, and Co molecular precursors by a sol-gel method. X-ray diffraction patterns and transmission electron microscopy showed that the resulting material is composed of an amorphous silicate network that encloses nanocrystal…
Abstract A new procedure for the derivation of the approximations for temperature integral from its derivatives is presented. This procedure can produce a series of the approximations, including some published and some new ones. By combining the different order derivatives of temperature integral, a new approximation…
Magnesium ( Mg ) and its alloys are being used as structural components in industry because of their high strength-to-weight ratio and relatively high stiffness. A shortcoming of Mg based alloys is their poor corrosion and wear resistance. Therefore, coatings or surface treatment are needed for protection purpose. Thi…