Materials Literature
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By using metal nitrates as starting materials and citric acid as a complexing agent, Y2Si2O7:Re3+ (Re=Eu, Tb) phosphors were prepared by a sol-gel method. X-ray diffraction was employed to characterize the resulting samples. The results of XRD indicate that the -Y2Si2O7 nanocrystal with size of 27 nm is obtained at 10…
Single phase W-type barium hexaferrite nano crystals of radar absorbing material (RAM) i.e., BaMe2Fe16O27 (Me2+=Fe2+) were synthesized by a modified flux method that combines the controlled chemical co-precipitation process for nucleation and complete uniform growth during in-situ annealing with NaCl flux under vacuum…
The temperature dependences of the long diagonals dMn–O of the MnO6 octahedron and the magnetic susceptibility χ of Nd2∕3Ca1∕3MnO3 in the temperature interval 100–290K are investigated. The functions dMn–O(T) and χ(T) are found to have anomalies in the charge-ordering range (Tco≈212K). The sharp decrease of the diagon…
We investigate switching characteristics of a vertical alignment (VA) liquid crystal (LC) cell doped with minute amounts of carbon nanotubes (CNTs). The doped CNTs increase the effective elastic constant of the LC–CNT mixture, decreasing the fall time of the cell. However, the doped CNTs disturb the LC alignment, gene…
The structural variations of synthetic zircon (ZrSiO 4 ) single crystals irradiated at room temperature by 280 keV Pb + ions (with fluences up to 1 × 10 15 ions/cm 2 ) were investigated using infrared (IR) spectroscopy. Like metamict zircon whose crystal structure is damaged and amorphized by naturally occurring α-dec…
Abstract Bamboo charcoal coated with silver (BC/Ag) was prepared by activation and chemical reduction processes at different AgNO 3 contents (10‐30 wt.%). The spectroscopic characterizations of the formation processes of BC/Ag composites were studied using X‐ray diffraction, scanning electron microscopy and transmissi…
We investigate functional capabilities of large arrays of gold and silver nanorods as elements of plasmonic devices. The samples were fabricated by electron beam lithography and lift-off techniques on glass substrates. The areas patterned by the nanorods or other nanoparticles can be large, with dimensions of up to ab…
Rich polymorphism has been found in a new series of lactic acid derivatives. The length of a non‐chiral n‐alkyl chain plays an important role in changing the sequence and temperature range of phases. Except for one homologue with the shortest chain, all compounds exhibit a rather wide antiferroelectric chiral smectic…
Abstract The kinetics of interaction of benzotriazole (BTAH) with the surface of copper were studied using an electrochemical quartz crystal microbalance (EQMB) and electrochemical impedance spectroscopy (EIS). Upon injecting BTAH into the electrolyte, three regions appear in the time response of the microbalance. Reg…
The critical-dimension scanning electron microscope (CD-SEM) is an essential tool for semiconductor fabrication process control because of its high resolution and high precision. However, in ArF lithography, the CD of resist changes during CD-SEM measurement due to shrinkage caused by the electron beam irradiation. Th…
The fluorescence of CdSe/ZnS nanorods in liquid-crystal and anisotropic polymer composites is studied. A high degree of the fluorescence anisotropy is shown. It is found that a solubilizer strongly affects the CdSe/ZnS orientation, which opens new possibilities for creating electrically controlled liquid-crystal compo…
Abstract The effect of enzymatic degradation on poly( ε ‐caprolactone) (PCL) films and sponges was investigated at 37 °C using Pseudomonas lipase. Film samples were prepared by the solution casting method, while sponges were obtained by the freeze extraction method. The porosity was 17 and 60% respectively. Weight los…
The lattice vibrations of a periodic silicon crystal are simulated by a molecular dynamics simulation. The history of atomic displacements and velocities obtained is used to compute the amplitudes of all phonon modes supported by the lattice. The phonon amplitude autocorrelation coefficients are found to decay exponen…
Nanocrystalline vanadium oxide thin films have been deposited by reactive DC magnetron sputtering onto glass substrates under different processing conditions. Structural analysis and phase identification have been carried out by means of X-ray diffractometry (XRD). The surface morphologies of the different films have…
The integration of biomaterials with skin is necessary to enable infection-free access to vasculature and body cavities. Also, integrating plastics and metals with skin increases options for the reconstruction of surgical and traumatic defects and enables the permanent implantation of robotic and electronic devices. U…
In order to propose a new dilute magnetic semicoductors (DMS) other than II–VI and III–V semiconductor based DMS, magnetism of CuAlO 2 based DMS is investigated by the Korringa–Kohn–Rostoker method combined with the coherent potential approximation within the local spin density approximation and Monte Carlo simulation…
Abstract The long-term photolysis of [iPrNH3]6[Mo7O24]·3H2O in aqueous solutions at pH 5–6 is found to provide the formation of anti-tumoral [H2MoV12O28(OH)12(MoVIO3)4]6− species (1a), the core of which is a well-known ε-isomer ({ε-MoV12}) of the Keggin anion showing edge-shared MoVO6 octahedra in the arrangement of s…
Theory-inspired design of organic electro-optic materials is explored for three classes of materials: (1) chromophore/polymer composites; (2) chromophores covalently incorporated into polymers, dendrimers, and dendronized polymers; and (3) chromophores doped into chromophore-containing host materials. Correlated quant…
Urea fertilizer is a major source of nitrogen, which is one of the essential nutrients for plant growth. Due to its uncontrollable release, this chemical can be wasted easily by leaching and volatilization that can adversely cause the contamination to the environment. In this work, a controlled-release material for ur…
CaMnO 3 systems are known to exhibit excellent thermoelectric (TE) performance at high temperature in air and are, therefore, good candidates for the n-type legs of TE oxide devices. In previous studies, however, several CaMnO 3 system legs have fractured easily after the power generation test. The fractures were prob…