Materials Literature
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Copolymers of 5,8-di(1H-pyrrol-2-yl)-2,3-di(thiophen-2-yl)quinoxaline (PTQ) in the presence of 2, 2'-bis(3,4-ethylenedioxythiophene) (BiEDOT) and 4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2-dodecyl-2H-benzo[1,2,3] triazole (BEBT) were synthesized via the potentiodynamic method in a tetrabutylammonium perchlora…
Zn2+ and Er3+ ions co-doped Gd2O3 nanophosphors were synthesized via a citric acid complexing method. The crystalline characterization shows that the Zn2+ doping induced a shrinking effect of the host cell by changing the lattice constant. Both Stokes photoluminescence and upconversion emission were significantly enha…
The proton conductivities of BaZr1-xYxO3-δ (BYZ) pellet samples with x = 0.06 to 0.4 were studied. The analysis showed that the optimum doping concentrations for bulk and grain boundary proton conductivity were at x = 0.1 and 0.2, respectively. The activation energies of the proton conductivity in bulk were between 0.…
We have obtained CCD UBVI KC photometry down to V ∼ 22.0 for the open clusters Hogg 12 and NGC 3590 and the fields surrounding them. Based on photometric and morphological criteria, as well as on the stellar density in the region, our evidence is sufficient to confirm that Hogg 12 is a genuine open cluster. NGC 3590 w…
近年来, 寻求环境友好型的污染土壤与污水净化高效修复剂成为国内外环境科学研究新的热点。随着环境分子科学的快速发展, 纳米材料在污染环境修复研究中的应用越来越受到重视, 纳米颗粒由于具有巨大的比表面积和微界面特征, 可以强化多种界面反应, 如对重金属离子及有机污染物的表面吸附、专性吸附及增强的氧化-还原反应等, 在重金属及有机污染物等污染土壤及污水治理中有望发挥重要作用。本文综述了目前国内外利用纳米材料进行污染土壤修复及污水净化的应用研究进展, 并展望了该研究领域的不足及研究前景, 以期为该研究领域的进一步深入拓展新的思路。
A comparative study of the solubilizing effect of polycyclic aromatic hydrocarbon (PAHs) on single-walled carbon nanotubes (SWCNTs) produced by the high-pressure decomposition of carbon monoxide (HiPco) and the arc discharge (AD) method has been carried out with the aid of fluorescence and Raman spectroscopy. For this…
The electronic and redox properties of the title polyanions have been calculated by means of density functional theory (DFT). These were unrestricted open-shell systems with electronic configuration of d 1 of V. In this behalf, energies and compositions of α-LUMO, β-LUMO, α-HOMO, and β-HOMO were also analyzed. First o…
Abstract Europium borate fluoride, Eu 5 (BO 3 ) 3 F, was synthesised as a single‐phase crystalline powder starting from europium oxide, europium fluoride and boron oxide at 1370 K. Eu 5 (BO 3 ) 3 F crystallises in the space group Pnma . Optical spectroscopy (emission and absorption) on Eu 5 (BO 3 ) 3 F confirms the pr…
Lead scandium tantalate (PbSc 0.5 Ta 0.5 O 3 , or PST) ceramics with the addition of 0.5–10 wt% excess PbO were fabricated by the hot‐pressing method. The percent of perovskite PST and the long‐range order parameter S were quantitatively characterized by X‐ray diffraction analysis. The grain size was measured by scann…
As a possible replacement for lead bearing solders, metal filled isotropically conductive adhesives (ICAs) have shown a lot of potential recently. But still they have to come a long way and overcome their limitations like low impact strength and moisture instability. The current paper attempts to address the limitatio…
We report $^{75}\text{A}\text{s}$ nuclear magnetic resonance measurements of the spin-lattice relaxation in the superconducting (SC) state of ${\text{LaFeAsO}}_{0.9}{\text{F}}_{0.1}$ and As-deficient ${\text{LaFeAs}}_{1\ensuremath{-}\ensuremath{\delta}}{\text{O}}_{0.9}{\text{F}}_{0.1}$. The temperature behavior of $1/…
Polyesters, which are readily synthesized in the absence of solvent, are excellent candidates for a new generation of pressure sensitive adhesives (PSAs) due to their low cost and potential biodegradability. In this study, linear, all-aliphatic polyesters with low glass transition temperatures (Tg) were synthesized us…
Arrays of well aligned Ru nanowires and nanotubes were prepared by electrodeposition through porous anodic aluminum oxide membranes. It is shown that Ru nanowires are formed at low cathodic deposition overpotential, while nanotubes are prepared at higher cathodic overpotential. The inner diameter of the nanotube can b…
The initial growth stage of the single-crystalline Sb and Co nanowires with preferential orientation was studied, which were synthesized in porous anodic alumina membranes by the pulsed electrodeposition technique. It was revealed that the initial growth of the nanowires is a three-dimensional nucleation process, and…
Abstract In this work, kinetics data on adsorption of fibronectin (Fn) on passivated Ti surfaces (Ti quartz crystals) in phosphate buffered saline (PBS) solution were obtained from in situ investigations with electrochemical quartz crystal microbalance (EQCM): from experiments performed at 15 and 60 mg l −1 Fn solutio…
Abstract Films obtained using molecular‐beam deposition of SiO powder on c‐Si (111) substrates for the purpose of SiO 2 system formation with silicon nanocrystals were investigated before and after 900–1100 °C annealing by photoluminescence, ultrasoft X‐ray emission spectroscopy, X‐ray photoelectron spectroscopy, X‐ra…
$\hbox{Ga}_{0.51}\hbox{In}_{0.49}\hbox{P}\hbox{–}\hbox{Al}_{0.52}\hbox{In}_{0.48}\hbox{P}\hbox{–}\hbox{GaAs}$blue photovoltaic detectors using AlInP as a light absorption active layer and GaInP as a short wavelength limiting cap layer have been fabricated by using gas source molecular beam epitaxy, and their performan…
A force field model of the Keating type supplemented by rules to break, form, and interchange bonds is applied to investigate thermodynamic and structural properties of the amorphous ${\text{SiO}}_{2}$ surface. A simulated quench from the liquid phase has been carried out for a silica sample made of 3888 silicon and 7…
The SiO(2)/SiO(x)/SiO(2) strip-loaded waveguide on Si substrate with buried Si nanocrystals (Si-ncs) in SiO(x) layer is demonstrated to show the Si-nc dependent optical gain. The amplified spontaneous emission (ASE) spectrum at 750-850 nm is observed with central wavelength of 805 nm and 3dB spectral linewidth of 140…
The purpose of this study is to clarify corrosion mechanism of a duplex stainless steel (DSS) through dissolution behavior of a ferritic phase and austenitic phase, respectively. A single phase specimen ([α] or [γ] phase specimen) which has chemical composition of each phase of a DSS was prepared by preferential disso…