Materials Literature
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Quasielastic neutron scattering and molecular dynamics simulation data from poly(ethylene oxide) (PEO)/poly(methyl methacrylate) (PMMA) blends found that for short times the self-dynamics of PEO chain follows the Rouse model, but at longer times past t(c) = 1-2 ns it becomes slower and departs from the Rouse model in…
Make way for a superlattice! A crystalline 3D superlattice of 2.3 nm molecular CdS nanoclusters was prepared from a convenient mononuclear cadmium thiophenolate precursor. HRTEM and STEM tomography show highly crystalline repetition of monodisperse frameworks. This combined with elemental and thermogravimetric analyse…
The proposed homogenization theory—a major extension of the recently published methodology [J. Opt. Soc. Am. B28, 577 (2011)]—yields an extended second-order material tensor consolidating the usual 36 local material parameters and additional ones that rigorously quantify nonlocality. The local part of th…
The temperature-dependent dynamic properties of [Cu(II)(2)(ADCOO)(4)(DMF)(2)]⋅(DMF)(2) (1) and [Cu(II)(2)(ADCOO)(4)(AcOEt)(2)] (2) crystals were examined by X-ray crystallography, (1)H NMR spectroscopy, and measurements of the dielectric constants and magnetic susceptibilities (ADCOO = adamantane carboxylate, DMF = N,…
The publisher regrets that there is a typographical error on page 2 of this article. The fourth sentence of section 3 should read as follows: The lines characteristic of B–H–B (1700–2000 cm -1 ) and B–H (2550–2650 cm -1 ) bonds of decaborane were not found in the Raman spectra of the crystals (figure 3) that confirms…
We present clear evidence that the global (macroscopic) transport from/to mesoporous materials is significantly affected by the interactions between the mesoporous host and the guest molecules. The problem is considered in a most general way so the solutions apply for a variety of cases such as the release of a guest…
Abstract Polymethylmethacrylate/starch (PMMA/starch) composites were prepared by emulsion polymerization method using potassium persulphate (KPS) as the radical initiator. The interaction of starch with polymethylmethacrylate was evidenced by ultraviolet–visible (UV–visible) spectroscopy and Fourier transform infrared…
The elaboration of spin crossover crystalline nanoparticles of [Fe(Htrz)2(trz)](BF4) (Htrz = 1,2,4-1H-triazole) by confined growth in surfactant based matrices, notably reverse microemulsions and reverse hexagonal liquid crystal phases, as templates is comparatively reported. The ability of the reverse microemulsions…
We present a density-functional-theory study of chromium-chain-embedded graphene and carbon nanotubes with a line defect consisting of octagonal and pentagonal carbon rings. It is shown that chromium atoms can be spontaneously adsorbed at octagonal sites and form an atomic chain along the line defect in graphene and c…
We present for the first time a biomolecule-recognition gating system that responds to small signals of biomolecules by the cooperation of biorecognition cross-linking and polymer phase transition in nanosized pores. The biomolecule-recognition gating membrane immobilizes the stimuli-responsive polymer, including the…
Low-symmetric complexes {[Co(μ(2)-L)(H(2)O)(2)]·H(2)O}(n) (1) and {[Co(μ(3)-L)(H(2)O)]·0.5H(2)O}(n) (2) and corresponding nanocrystals were obtained, which exhibit structural recurrence behaviour at various temperatures as well as changes of chiral, nonlinear optical and ferroelectric properties.
The reactions of iron(II) sulfate, 4-amino-3,5-di-2-pyridyl-4H-1,2,4-triazole (abpt), and pentacyanidonitrosylferrate(II) or hexacyanidoplatinate(IV) resulted in the formation of one-dimensional iron(II) spin-crossover compounds [Fe(abpt)(2)(μ-Fe(CN)(5)(NO))](n) (1) and [Fe(abpt)(2)(μ-Pt(CN)(6))](n) (2) with the spin-…
The tetra-n-butylammonium (TBA) salts of [((i)PrO)TiMo(5)O(18)](3-) 1 and [((i)BuO)TiMo(5)O(18)](3-) 2 were prepared by hydrolysis of mixtures of (TBA)(2)[Mo(2)O(7)], (TBA)(4)α-[Mo(8)O(26)] and Ti(OR)(4) (R = (i)Pr or (i)Bu) in acetonitrile. Treatment of (TBA)(3)1 with alcohols ROH afforded primary and tertiary alkoxi…
The phase transformations of Mg 1.4 Pr 0.6 Ni 4 and Mg 1.0 Pr 1.0 Ni 4 during hydrogenation and dehydrogenation were investigated using in situ X-ray diffraction (XRD). Both alloys showed the cubic MgCu 4 Sn type structure with space group F 4̅3 m before hydrogenation. The hydride β-Mg 1.4 Pr 0.6 Ni 4 H ∼3.6 had the s…
Preparation and characterization of vanadium-containing polyphosphomolybdates supported on ionic liquid-modified MCM-41, MCM-41-Im, are reported. The catalyst, [PVMo@MCM-41-Im], was characterized by elemental analysis, X-ray diffraction, scanning electron microscopy and also FT-IR, and UV-Vis spectroscopic methods. Th…
The degradation kinetics and micro-scale structure change of microcrystalline cellulose during anaerobic biodegradation were investigated. A modified Logistic model was established to properly describe the kinetics, which showed good fitness and wide applicability for cellulose degradation. A maximum degradation rate…
A universal, simple, robust, widely applicable and cost-effective aqueous process is described for a controlled oxidative dissolution process of micrometer-sized metal powders to form high-purity aqueous dispersions of colloidally stable 3-8 nm metal oxide nanoparticles. Their utilization for making single and multila…
Keggin-type mono Co(II)-substituted phosphotungstate was synthesized from 12-tungstophosphoric acid and cobalt chloride tetrahydrate. The obtained complex was systematically characterized in solution as well as solid by various physicochemical techniques. A single-crystal X-ray analysis shows that the complex crystall…
Abstract Polysulfone (PSU)/multiwalled carbon nanotubes (MWCNTs) nanocomposites containing 0.5–3 wt% of MWCNTs were prepared by solution casting technique. To understand the dispersion behavior of MWCNTs inPSU matrix, high resolution transmission electron microscopy (HRTEM) and field emission scanning electron microsc…
Abstract Abundance and species composition of non-marine benthic diatom assemblages were studied from surface sediments samples of 11 streams distributed in Socotra Island, located in the northwest Indian Ocean. A total of 145 diatom species, representing 44 genera, were identified. The overall diatom communities appe…