Materials Literature
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The possibility to design novel functional materials with desired and controlled characteristics demands a thorough understanding of the electronic structure of the building molecules and of the derived molecular materials. Phthalocyanines are versatile molecules, suitable for a variety of technological applications.…
This report describes a flexible and stretchable superhydrophobic surface on an elastomer silicone rubber by one-step laser treatment for the future flexible and wearable electronics. Previously, there are some studies about the fabrication of superhydrophobic surface on silicone rubber by forming micro- or nanostruct…
Abstract Quantum chemical calculations have been performed to study the molecular geometry, 1H and 13C NMR chemical shifts, conformational, natural bond orbital (NBO) and nonlinear optical (NLO) properties of the 2-chloro-5-(2-hydroxyethyl)-4- methoxy-6-methylpyrimidine molecule in the ground state using DFT and HF me…
In dielectrics with high steady leakage of conductivity, the frequency–temperature dependences of the dielectric loss tangent generally allow us to determine the relaxation time and activation energy of relaxation process only when they are strong. With weak relaxation processes, there are no extrema in the frequency…
Microwave-assisted hydrothermal synthesis of nano-Nb doped BaTiO 3 was performed at 150°C for 2 hours, using C 16 H 36 O 4 Ti, Ba(OH) 2 · 8H 2 O, NbCl 5 and NaOH as starting chemicals. The resulting powder deposited on to Al 2 O 3 substrates with print screen method and were sintered by Microwave Sintering (MS) of 2.4…
Due to its lithium ion intercalation capability, vanadium pentoxide is extensively studied for applications such as electrode material for pseudocapacitors, electrochromic devices, and cathodes in high capacity lithium ion batteries. Vanadium oxide has a layered structure and, in order to enhance lithium ion intercala…
The phase transitions of Pb1−xSrx(Al1/3Nb2/3)0.1(Zr0.52Ti0.48)0.9O3 (Sr-modified PAN-PZT) ceramics with Sr compositions of x = 2%, 5%, 10% and 15% have been investigated using X-ray diffraction (XRD), temperature dependent dielectric permittivity and Raman scattering. The XRD analysis show that the phase transition oc…
Electron beam evaporation was employed in order to fabricate Al- and Tb-codoped Si oxide multilayers via the delta-doping approach. This methodology permits the control of the rare-earth (RE) separation along the growth direction with nanometric resolution. To investigate the control of the RE separation in the growth…
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Polycrystalline Zn1 − x Fe x O (0 ≤ x ≤ 0.075) solid solutions with the wurtzite structure, which belong to the class of diluted magnetic semiconductors, have been synthesized by the precursor method using a mixed formate of the composition Zn1 − x Fe x (HCOO)2 · 2H2O as a precursor. It has been found that the iron co…
Abstract Caffeine is well known alkaloid chemical compound belonging to the methyl-xanthines group. It is an active substance that is found in many cosmetic products, as it has a stimulating action on both the central nervous system and the metabolism. Commercially available topical formulations normally contain 3% of…
The Ho3+/Yb3+ co-doped α-NaYF4 single crystal was grown successfully for the first time by a modified Bridgman method in which KF was used as assisting flux and a large temperature gradient (70–90 °C/cm) of solid-liquid interface was adopted. Upconversion emissions at green ∼544 nm, red ∼657 and ∼751 nm were obtained…
Magnetic cooling technology, originally developed by Small and Medium Enterprises (SMEs) some years ago, is currently under evaluation by different global appliance manufacturers. Their intent is the direct application of it in the domestic refrigeration market for the construction of future products. - The aim of thi…
In this work, composite ceramic was produced to base Al2O3 reinforced with 35% weight TiO2 and variation 0-2% La2O3, were evaluated properties to study their microstructural characteristic and mechanical properties as applicable cutting tools. The ceramic composites were produced by thermo-mechanical process. It was o…
Compared to other conventional reflectors, better Radar Cross-Section (RCS) can be efficiently produced by the Luneburg Lens reflector. In this paper, a compact Ku-band Luneburg Lens reflector composed of metamaterial-based unit cells has been designed, simulated and characterized. By adjusting the dimension of the un…
Small amounts of Cu and Al-K substitution on the A and B site of BaTiO3, respectively resulting a solid solution of the type Ba1-xCuxTi1-x(AlK)xO3 (BCTAK) [x = 0.05, 0.10, 0.15, 0.20] have been investigated. The compositions have been prepared in the nanocrystalline range by chemical route. X-ray diffraction revealed…
We developed high contrast flexible blue phase LCD with polymer walls by UV irradiation through a photo mask. We clarified that both polymer walls and BP stabilization can be achieved by only one time UV irradiation and the polymer walls can suppress the distortion of the alignment of blue phase LC in a bending state.
Micromachined terahertz metamaterial with polarization insensitive switching for both inductive-capacitive and dipolar resonances is experimentally demonstrated. Eight microcantilevers placed at each corner of an octagon ring provides the desired rotational symmetry and out-of-plane actuated electrostatic microcantile…
We have demonstrated FETs with L down to 80 nm on single-crystal 1L CVD-grown MoS2, with electrical properties comparable to (or better than) 1L exfoliated MoS2and record current density. Such promising characteristics are realized in part through large-grain crystalline films with improved contacts. These results are…
In the present study three systems of carbon steel (1008) are evaluated, which were provide of two corrosion control methods, barrier and cathodic protection (painted and galvanized respectively) commonly used in the construction industry. They were evaluated under accelerated conditions exposed in fog chamber, accord…