Materials Literature
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The five quaternary compounds Ba 3 Gd 2 [P 4 S 16 ] ( 1 ), Ba 3 Tb 2 [P 4 S 16 ] ( 2 ), Ba 3 Dy 2 [P 4 S 16 ] ( 3 ), Ba 3 Ho 2 [P 4 S 16 ] ( 4 ), and Ba 3 Er 2 [P 4 S 16 ] ( 5 ) were synthesized at elevated temperatures in carbon-coated quartz tubes. The isostructural compounds crystallize in the orthorhombic space gr…
Abstract Nonaqueous synthesis of nanosilica in diglycidyl ether of bisphenol‐A epoxy (DGEBA) resin has been successfully achieved in this study by reacting tetraethoxysilane (TEOS) directly with DGEBA epoxy matrix, at 80 °C for 4 h under the catalysis of boron trifluoride monoethylamine (BF 3 MEA). BF 3 MEA was proved…
The relative activities of a low-surface crystalline and high-surface amorphous LaOCl, further denoted as S1 and S2, have been compared for the destructive adsorption of CCl4. It was found that the intrinsic activity of S2 is higher than that of S1. Both samples were characterized with X-ray diffraction (XRD), X-ray p…
Coupled equations of radial and translational motions of a spherical bubble, accounting to the first order for the compressibility of the surrounding liquid, are derived using an energy approach. It is shown that the compressibility corrections appear only in the radial equation, while the translational equation keeps…
Treatment of the octahedral Ru(II) complex [trans,cis,cis-RuCl(2)(DMSO-O)(2)(CO)(2)] with an equimolar amount of 5,10-bis(3'-pyridyl)-15,20-diphenylporphyrin (3'-cis-DPyP) yielded, upon selective replacement of the DMSO ligands, the neutral 2 + 2 metallacycle 2. NMR spectroscopy provided unambiguous evidence that only…
The coupled neutron diffraction and Mossbaüer study of the layered oxide Sr 3 NdFe 3 O 9 shows for the first time the possibility of anionic vacancies ordering in an oxygen-deficient related Ruddlesden−Popper- (RP-) type ferrite leading to an original intergrowth of brownmillerite and K 2 NiF 4 -type layers. The antif…
We demonstrate that changes in electrolyte composition and applied potential during aqueous electrodeposition can be used to tune the magnetic hysteresis response of thin-film Fe3O4 (magnetite) on polycrystalline metal substrates. X-ray diffraction data confirmed that magnetite formation in electrolytes containing KCH…
Abstract Poly(2,4‐dimethyl‐1,4‐phenylene oxide) (PPO), poly(benzo[1,2‐ d :5,4‐ d ′]bisoxazole‐2,6‐diyl‐1,4‐phenylene) (PBO) and poly(benzo[1,2‐ d :4,5‐ d ′]bisthiazole‐2,6‐diyl‐1,4‐phenylene) (PBZT), which are polymers with extended conjugated structures, undergo a self‐sensitized photo‐induced electron‐transfer react…
7-(Dimethylamino)-1-methylquinolinium tetrafluoroborate ( 2 ), a stable color shifting mobility sensitive fluorescent probe, was employed for investigating physical aging in amorphous polymers. A linear correlation between the emission wavelength of 2 and the specific volume of the polymer was found in polycarbonate (…
Zinc oxide single crystals implanted at room temperature with high-dose (1.4×1017cm−2) 300 keV As+ ions are annealed at 1000–1200 °C. Damage recovery is studied by a combination of Rutherford backscattering/channeling spectrometry (RBS/C), cross-sectional transmission electron microscopy (XTEM), and atomic force micro…
The ternary molecular nanoclusters [Zn(x)Cd(10-x)Se4(SePh)12(PnPr3)4] (x = 1.8, 1 a; x = 2.6, 1 b) were employed as single-source precursors for the synthesis of high-quality hexagonal Zn(x)Cd(1-x)Se nanocrystals. The tellurium clusters [Zn(x)Cd(10-x)Te4(TePh)12(PnPr3)4] (x = 1.8, 2 a; x = 2.6, 2 b) are equally conven…
Both quantitative and qualitative knowledge of strain and strain distributions in quantum dots are essential for the determination and tailoring of their optoelectronic properties. Typically strain is estimated using classical elasticity and then coupled to a suitable band structure calculation approach. However, clas…
In this work, we address the issue of controlled modification of the surface topography of polydimethylsiloxane (PDMS) when subjected to oxygen-based plasma treatments, and we investigate the resulting enhanced surface area as a means of controlling the surface wetting properties. We fabricate wavy structures of contr…
Structures of surface hydroxyl groups arranged on a reduced TiO2(110) surface that had line oxygen vacancies were studied using noncontact atomic force microscopy (NC-AFM). NC-AFM results revealed that by increasing the density of oxygen vacancies on the TiO2(110) surface, line oxygen vacancies were formed by removal…
Abstract Living anionic surface‐initiated polymerization on flat gold substrates has been conducted to create uniform homopolymer and diblock copolymer brushes. A 1,1‐diphenylethylene (DPE) self‐assembled monolayer was used as the immobilized precursor initiator. n ‐BuLi was used to activate the DPE in tetrahydrofuran…
The $\mathrm{Y}{\mathrm{Fe}}_{2}{({\mathrm{H}}_{y}{\mathrm{D}}_{1\ensuremath{-}y})}_{4.2}$ compounds $(y=0,0.64,1)$ crystallize in the same monoclinic structure with a linear increase of the cell volume reaching 0.80% between the hydride and the deuteride. These compounds undergo a first-order magnetovolumic transitio…
The crystallization temperature of Bi1.5Zn0.5Nb1.5O6.5 (BZN) films was reduced by a combination of conventional heating and irradiation with a pulsed KrF excimer laser. Both the energy density and substrate temperature affect the properties of laser-annealed BZN films. It was found that the crystallinity and dielectri…
Highly birefringent liquid-crystalline polymers (LCPs) containing an azobenzene group directly connected to a tolane moiety (azotolane moiety) were synthesized. Attention was focused on the effect of the position of the tolane moiety in the mesogenic azotolane group and the donor−acceptor substituent on photochemical…
[structure: see text] The synthesis of the multistate photochromic switch 3 is described. This switch contains three dihydropyrene (DHP) units in the most conjugated fully closed form 3-c,c,c. The thermally stable form has the central DHP unit open and is 3-c,o,c. NMR and laser flash photolysis experiments were used t…
When an electrical potential is applied to silica glass at 250 °C, there is a residual electrical field after the applied potential is removed. The profile of this field with distance is modeled as resulting from interdiffusion of sodium and hydronium ions; the shapes of the measured and calculated profiles of electri…