Materials Literature
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We report on the cooperative energy transfer process in RE 3+ -Yb 3+ (RE=Pr, Tm and Tb) codoped transparent glass-ceramics containing CaF 2 nanocrystals, which are capable of splitting a visible photon absorbed by RE 3+ into two near infrared photons emitted by Yb 3+ . The formation of CaF 2 nanocrystals in the glass-…
We investigated the potential of symplocomoside (1) and symponoside (2), glycosides isolated from the bark of Symplocos racemosa to inhibit thymidine phosphorylase (TP) activity and associated angiogenesis. Compound 1 was a reversible, noncompetitive inhibitor of deoxythymidine binding to TP (IC(50) = 65.45 +/- 5.08 m…
The elemental and ionic quantitative analyses of the synthetic lanthanide borosilicate glass (Al-B-Gd-Hf-La-Nd-Pu-Si-Sr-O) are performed using the characteristics of the X-ray photoelectron spectra of the outer-shell and inner-shell electrons in the binding energy range 0–1000 eV. The oxidation states of the metal ion…
TiO 2 nanoparticles were treated in a fluidized reactor by introducing Hexamethyldisiloxane (HMDSO) plasma monomer. The organic HMDSO-polymer vapor was condensed on the nanoparticles and lowered their surface energy. This plasma treatment was harmless to the crystal lattice of the TiO 2 nanoparticles. The treated nano…
new industrial revolution has already begun around nanotechnologies, letting us anticipate major scientific breakthroughs that will affect each economic activity sector and whose expected global economic impacts will exceed $1000 billion annually by 2012. Simultaneously, many studies reveal that nanoparticles represen…
The effective-medium model has been generalized within the dipole approximation, with allowance for the shape anisotropy and dynamic depolarization of semiconductor nanoparticles. The calculations revealed nonmonotonic dependences for the birefringence and dichroism on the nanoparticle size. Comparison of the measured…
In this paper, electron-doped La0.8Te0.2MnO3 film has been prepared on SrTiO3 (100) substrate by pulsed laser deposition method, and the photoinduced resistivity change and colossal magnetoresistance effect have been investigated. The results show that the film has a high metal-insulator transition temperature TMI of…
Phase diagrams of three sections of the four-component system PbTiO 3 -PbZrO 3 -PbNb 2/3 Mg 1/3 O 3 -PbGeO 3 are plotted (at 20°C) and electrophysical properties of solid solutions are studied. It is found that morphotropic areas, in which dielectric, piezoelectric, and elastic properties are extreme, have a wider con…
The solid-state diffusion of Al in ZnTe through an Al oxide layer was examined for the fabrication of ZnTe-based light-emitting diodes (LEDs). By changing the thickness of the Al oxide layer deposited on a clean ZnTe surface, the Al concentration at the surface of ZnTe can be adjusted. The excellent uniformity of the…
Catalytic properties in relation to the hydrogen oxidation reaction and thermal stability of materials based on the nanocomposite amorphous Al 2 O 3 -nanocrystalline ZrO 2 were studied.
Abstract The crystal structures of tetrachloroferrate(III) complexes having stoichiometry (BH) + [FeCl 4 ] − (where B = iso quinoline and 4‐aminopyridine) were determined at 100 K. While weak interactions, particularly N–H···Cl hydrogen bonds, are evident in the structures, distances between the Fe(III) centers are qu…
Polyaniline (Pani) films containing CdTe, CdSe, and both nanoparticles were deposited using spin coating technique. Pani was chemically synthesized by oxidation method, whereas surfactant free CdTe and CdSe nanoparticles were prepared using solvothermal method. Binanoparticle films showed an increase in the absorption…
This paper is the continuation of part (I), which completes the derivations of the 3D global wave modes solutions, yields the stability criterion and, on the basis of the results obtained, demonstrates the selection criterion of pattern formation.
We studied the elastic properties of ZnO nanofilms (NFs) and nanowires (NWs) terminated by either (101¯0) or (112¯0) surfaces, based on the empirical Buckingham-type potential. It is found that the Young’s moduli of ZnO NFs increase as the thicknesses decrease and that of (101¯0)-surface terminated NFs are systematica…
The effect of multi-reprocessing on the phase structure and characteristics is studied for thermoplastic elastomers based on recycled high-density polyethylene (HDPE), ethylene-propylene-diene rubber (ternary copolymer of ethylene, propylene, and 5-ethylidene-2-norbornene) (EPDM), and recycled ground tire rubber (RGTR…
The population of an unknown naviculoid diatom from Lake Vrana in Croatia was identified as Navicula hedinii, a species described in 1922 from a small lake in eastern Turkestan (China). This species has some similarities with Navicula pseudocrassirostris, a marine species found in European coastal waters. Based on the…
While the surface effect can be ignored in macroscale structures, it plays an important role in nanoscale structures. Molecular dynamics (MD) simulation is a useful method to evaluate this effect, but is not applicable to mesoscale problems due to the excessive computing time required. Therefore, it is necessary to de…
An alternative method has been developed for fabricating high-density products from ceramics based on self-bonded silicon carbide. The product blanks are formed by slip molding of thermoplastic mixtures under pressure. The composition of the polyfractional mixture has been defined and new temporary binders, whose rheo…
Behavior of oscillating bubbles is of fundamental study for acoustic cavitations, and is of great importance for medical field. For example, angiographic and diagnosis of cancer of liver. We focused on behavior of multiple air bubbles exposed to ultrasonic wave. The bubbles were injected into the static water from a v…
We discuss the available experimental data for light-induced phase separation (LIPS) in the spin-crossover crystal [Fe(ptz) 6 ](BF 4 ) 2 . They are found in qualitative agreement with a spinodal instability process decribed by a macroscopic mean-field master equation. Sizable discrepancies with the model are discussed…