Materials Literature
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Highly biocompatible pH-sensitive diblock copolymer vesicles were prepared from the self-assembly of a biocompatible zwitterionic copolymer, poly[2-(methacryloyloxy)ethyl phosphorylcholine-block-2-(diisopropylamino)ethyl methacrylate], PMPC-b-PDPA. Vesicle formation occurred spontaneously by adjusting the solution pH…
We present a model applicable to ultrasound contrast agent bubbles that takes into account the physical properties of a lipid monolayer coating on a gas microbubble. Three parameters describe the properties of the shell: a buckling radius, the compressibility of the shell, and a break-up shell tension. The model prese…
Methods extracting fast all the peak intensities from a complete powder diffraction pattern are reviewed. The genesis of the modern whole powder pattern decomposition methods (the so-called Pawley and Le Bail methods) is detailed and their importance and domains of application are decoded from the most cited papers ci…
Abstract Halloysite clay minerals are ubiquitous in soils and weathered rocks where they occur in a variety of particle shapes and hydration states. Diversity also characterizes their chemical composition, cation exchange capacity and potassium selectivity. This review summarizes the extensive but scattered literature…
Single-crystalline and uniform nanopolyhedra, nanorods, and nanocubes of cubic CeO2 were selectively prepared by a hydrothermal method at temperatures in the range of 100-180 degrees C under different NaOH concentrations, using Ce(NO3)3 as the cerium source. According to high-resolution transmission electron microscop…
O objetivo principal deste trabalho é apresentar uma pesquisa bibliográfica sobre a aplicação de supercapacitores. Supercapacitor é o termo usado para descrever os capacitores eletroquímicos de dupla camada. Este dispositivo de armazenamento de energia possui elevado valor de capacitância e baixa resistência série equ…
The crystal structures of three isotypic orthorhombic dihydrogendiphosphates, namely dipotassium copper(II)/nickel(II)/zinc(II) bis(dihydrogendiphosphate) dihydrate, K2M(H2P2O7)2.2H2O (M = Cu, Ni and Zn), have been refined from single-crystal data. The M2+ and K+ cations are located at sites of m symmetry, and the P a…
Abstract Tencel is a regenerated cellulose fiber produced using an environmentally‐responsible dry‐jet wet‐spinning process, which contributes to its excellent mechanical properties. In this study, the tensile properties of Tencel continuous filaments are characterized and the effect of twist on mechanical properties,…
Abstract The linear viscoelastic properties of copolypropylene (cPP)–clay nanocomposites (cPPCNs) prepared by melt intercalating with different amounts of clay were extensively examined by rheological measurements. Meanwhile, the clay effects on the cPP confinements were first estimated by calculating the activation e…
A substantial internal friction peak associated with grain boundary (GB) has been observed in pure aluminum bicrystals with ⟨100⟩ tilt GBs, which is similar to that observed for ⟨112⟩ tilt GBs in the previous work [Phys. Rev. B 71, 060101(R) (2005)]. The peak is suggested to be induced by GB sliding, but with differen…
In the torque created by an electric field, highly polarizable single-walled carbon nanotubes, suspended in dichloroethane, rotate and align with the field creating a transient induced birefringence (TEB). The magnitude of the birefringence, $\ensuremath{\Delta}n$, is followed in time by the switching of a square volt…
A method for more-accurate prediction of crystallization kinetics is greatly needed in the field of industrial crystallization. Traditional empirical correlations cannot give reliable predictions, because of the highly nonlinear behavior of crystallization kinetics, although they have been used for a long time. In thi…
A systematical and detailed nomenclature for dendritic species (“cascadane-nomenclature”) is developed which is based on the rules of naming dendrimers introduced by G. R. Newkome in 1993. As the importance and versatility of dendritic species in organic chemistry is increasing, it is to distinguish between different…
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…