Materials Literature
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The authors have performed the synthesis and grain growth of pure calcium copper titanate (CaCu 3 Ti 4 O 12 or CCTO) compound and its derivatives by substituting silicon CaCu 3 Si x Ti 4−x O 12 (CCSTO) to determine the effect on dielectric properties and resistivity. The authors observed significant increase in the re…
0.14 at% Mn-doped 0.95(Na 1/2 Bi 1/2 )TiO 3 -0.05BaTiO 3 (0.95NBT-0.05BT) lead-free single crystals were grown by a top-seeded solution growth method (TSSG). X-ray powder diffraction measurement showed that the as-grown single crystals exhibit rhombohedral perovskite structure with apparent distortion. With the increa…
The spin-orbit splitting of graphene $\ensuremath{\pi}$ states can be strongly enhanced by external influences such as corrugation or proximity to heavier atoms. Here we investigate experimentally and theoretically whether such strong enhancement is possible for graphene on SiC(0001). By spin- and angle-resolved photo…
Three new gallium selenites, Rb3HGa2(OH)2(SeO3)4, Rb3Ga5(SeO3)8(HSeO3)2·0.5H2O, and RbGa(SeO3)2·H2O, have been synthesized by hydrothermal reactions using Rb2CO3, Ga(NO3)3·xH2O, and SeO2 as reagents. Rb3HGa2(OH)2(SeO3)4 consists of unidimensional corner-linked chains of GaO4(OH)2 that are connected by a SeO3 group, wh…
The electron drift velocities and the effective ionization coefficients have been measured with a pulsed Townsend apparatus for the SF 6 –N 2 O mixtures (1–75% SF 6 ) over the combined density-normalized electric field strength, E / N , from 130 to 420 Td (1 Townsend = 10 −17 V cm 2 ). Strong electron detachment effec…
Purpose The purpose of the research was as follows. In situ modified urea formaldehyde resins were prepared from clay (montmorillonite) and organoclay in the presence of base catalyst. Different clay contents (1 wt%, 3 wt%, 6 wt%) were used to produce clay modified nanocomposite resins. These nanocomposites were chara…
The nonlinear (NL) optical properties of glassy xBi2O3-(1−x) GeO2 with x = 0.72 and 0.82 were investigated. The experiments were performed with lasers at 800 nm (pulses of 150 fs) and 532 nm (pulses of 80 ps and 250 ns). Using the Kerr gate technique, we observed that the NL response of the samples at 800 nm is faster…
Morphology manipulation: Epitaxial bonding is created electrochemically between yttrium-stabilised zirconia (YSZ) nanoparticles and micrometre-scale Ni particles to effectively reduce the interfacial energy, which can be used to advance the fabrication of well-known Ni/YSZ metal–oxide interfaces. By unlocking wettabil…
A Periodic Mesoporous Organosilica (PMO) functionalized with sulfonic acid groups has been successfully synthesized via a sequence of post-synthetic modification steps of a trans-ethenylene bridged PMO material. The double bond is functionalized via a bromination and subsequent substitution obtaining a thiol functiona…
The pyrophosphate K 2 NiP 2 O 7 has been synthesized by the classic ceramic method and characterized by X-ray diffraction, solid-state 31 P magic angle spinning (MAS) NMR, and IR and electrical impedance spectroscopy. The solid-state 31 P MAS NMR, performed at 121.49 MHz, shows two isotropic resonances at −17.66 and −…
Graphyne, a new type of carbon allotropes, has attracted considerable attention in recent years. Using molecular dynamics simulations, we investigate the mechanical properties of four different graphynes (α-, β-, γ-, and 6,6,12-graphynes) functionalized with hydrogen. The simulations results show that hydrogenation ca…
Polycrystalline sol–gel‐derived SrTiO 3 / Na 0.5 Bi 0.5 TiO 3 / SrTiO 3 ( ST / NBT / ST ) thin films were designed to achieve the electrical isolation of the NBT , and to mediate the temperature dependency of the dielectric properties. Proper thermal annealing of particulate phase enabled us to achieve compositionally…
The effect of hypochlorite treatment on the layer thickness and conductivity of a state-of-the-art high conducting poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated as a function of exposure time and hypochlorite concentration. Because of overoxidation by the hypochlorite the PEDOT:P…
In order to know more about the surface state of GaAs(100) epitaxial wafer during a storage period of two years, the XPS analysis was carried out four times on the surface, respectively polished by chemical etching, stored in desiccator for half a year, one year and two years. The results indicated that even after cle…
Understanding the dynamics of the glass transition ofpolymers and molecular liquids has been a goal of physicists for more than a half-century. The nature of this transition is directly linked to the heterogeneity of the dynamics, reflected in spatial and temporal correlations of molecular motions, as well as a distri…
This research identified and characterized factors that influenced nanomaterial bioavailability to three aquatic plants: Azolla caroliniana Willd, Egeria densa Planch., and Myriophyllum simulans Orch. Plants were exposed to 4-, 18-, and 30-nm gold nanoparticles. Uptake was influenced by nanoparticle size, the presence…
Pipe connectors can significantly influence galvanic corrosion between lead and copper pipes by distancing the lead from copper pipe, introducing a third metal, and forming crevices. In this study, the effects of distance, connector material, and crevices on galvanic corrosion were examined, and bench‐scale comparison…
Nowadays, the use of calixarenes and nanotubes are widely spread in the field of drug delivery. In this work, interaction between p-sulphonatocalix[4]arene and nanotube(6,6)with Fluorouracil drug is investigated. Density function theory (DFT) calculations have been performed using the Gauss view and Gaussian03 by B3LY…
PURPOSE: The purpose of this study is to evaluate if the differential exchange rates with bulk water between amine and amide protons can be exploited using chemical exchange saturation transfer magnetic resonance (CEST-MR) to monitor the release of glutamate induced by carboxypeptidase G2 (CPG2), an enzyme utilized in…
Reasonably high oxygen permeation fluxes, ∼4 × 10 −2 μmol.cm −2 .s −1 , were obtained from surface decoration with La 0.8 Sr 0.2 CoO 3-δ (LSC 113 ) or LaSrCoO 4±δ (LSC 214 ) on La 0.8 Sr 0.2 Ga 0.8 Mg 0.115 Co 0.085 O 3-δ (LSGMC) and Ce 0.8 Sm 0.2 O 2-δ (SDC) membranes at 700°C. Promoting surface exchange kinetics at…