Materials Literature
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Polymer nanospheres were synthesized through polymerization of resorcinol/formaldehyde (RF) in the presence of a basic amino acid, l -lysine, as a catalyst. The diameters of the RF polymer nanospheres can be tuned in the range of 30−650 nm by adjusting the molar ratios of l -lysine/H 2 O and resorcinol/H 2 O in the pr…
A versatile method is proposed to generate configurations of coarse-grained models for polymer melts. This method, largely inspired by chemical "radical polymerization," is divided in three stages: (i) nucleation of radicals (reacting molecules caching monomers), (ii) growth of chains within a solvent of monomers and…
Solubilization of fluticasone propionate (FP) was effected using aqueous solutions of (i) different grades of poly(ethylene glycol) (PEG), (ii) methanol, and (iii) acetone to enable antisolvent crystallization by the addition of water. The solubility of FP in acetone was significantly higher than in PEG 400 or PEG 600…
Ultrathin films of cellulose were functionalized with iron protoporphyrin IX (FePP). Spin-coating allows the production of silylated cellulose films in a controlled way. Cellulose regeneration is achieved through the hydrolyzation of the silane groups, exposing the film to acidic vapors. To enhance the reactivity of t…
We present the magnetic properties and the 1 H nuclear magnetic resonance dispersion profiles of Mn-ferrites-based compounds, as possible novel contrast agents (CAs) for magnetic resonance imaging (MRI). The samples consist of nanoparticles (NPs) with the magnetic core made of Mn 1+ x Fe 2− x O 4 , obtained by the rap…
Light scattering by a spherical particle with radial anisotropy is discussed by extending Mie theory to diffraction by an anisotropic sphere, including both the electric and the magnetic anisotropy ratio. It is shown that radial anisotropy may lead to great modifications in scattering efficiencies and field enhancemen…
Solute drag in solute-strengthened alloys, caused by diffusion of solute atoms around moving dislocations, controls the stress at deformation rates and temperatures useful for plastic forming processes. In the technologically important Al–Mg alloys, the solute drag stresses predicted by classical theories are much lar…
Time-resolved Faraday rotation measurements in the ultraviolet have been performed to reveal the ultrafast spin dynamics of electrons in colloidal ZnO quantum dots. Oscillating Faraday rotation signals are detected at frequencies corresponding to an effective g factor of g = 1.96. Biexponential oscillation decay is ob…
Inorganic nanorod/conjugated polymer composites are advanced materials for photovoltaics. It is shown that a post-synthesis treatment of PbS nanocrystal/poly(2-methoxy-5-(2-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV) composites, synthesized by a low-temperature and surfactant-free method, results in the controlled…
Previous studies suggest that the solubility of Al in acid forest soils may be expressed as the log Al 3+ activity = − n pH + log K H‐Al + log Al p /C p concentration ratio, with Al p and C p representing pyrophosphate‐extractable Al and C, respectively, and K H‐Al is the binding constant of Al to protonated complexat…
Focused beam reflectance measurement (FBRM) has gained much popularity as a tool for particle system characterization both in crystallization research and in manufacturing. The precise interpretation of FBRM data, however, still remains an issue of some conjecture and dispute. This study examines the relationship amon…
Microspheres with tunable functional properties are prepared by controlled aggregation of nanoparticles in emulsion droplets. In particular, complex rutile-phase morphologies are obtained by heat treatment of anatase titania aggregates. The refractive index of the microspheres can be modulated by using mixtures of sil…
We report a very simple and efficient method to prepare LDHs of Mg−Al, Mg−Fe, and Zn−Al by simply mixing solid divalent metal oxide with trivalent metal chloride solution at 30 °C. Calcined Mg−Al and Mg−Fe are effective in removing low concentration of Br − from a mixed solution (Br − = 0.1 mmol/dm 3, Cl − = 1.0 mmol/…
The local structures around Co atoms in ${\text{Co}}_{2}{\text{FeSi}}_{1\ensuremath{-}x}{\text{Al}}_{x}$ ($x=0$, 0.5, and 1.0) Heusler alloys have been investigated using $^{59}\text{C}\text{o}$ NMR spin-echo method and their effect on the tunneling magnetoresistance for the junctions using ${\text{Co}}_{2}{\text{FeSi…
A building unit of Prussian blue was isolated as a cyanide-bridged iron cube of [Fe(II)4Fe(III)4(CN)12(tp)8] x 12 DMF x 2 Et2O x 4 H2O [tp(-) = hydrotris(pyrazolyl)borate]. A cyclic voltammogram showed quasi-reversible four-stepped redox waves, which correspond to [Fe(III)4Fe(II)4]/[Fe(III)5Fe(II)3](+), [Fe(III)5Fe(II…
It is shown that magnetic quantum states characterized by a toroidal moment of the same order of magnitude as the routinely measured molecular magnetization can arise in molecular wheels from the interplay between isotropic exchange and on-site magnetic anisotropy. They represent the first example of noncollinear mole…
The syntheses and spectroscopic properties of eight new push-pull-type near-infrared fluorophores that contain either isobenzofuran or isothianaphthene subunits are presented. The isobenzofuran dyes demonstrate significantly red-shifted absorption compared with their isothianaphthene counterparts, which is attributed…
N-body simulations have demonstrated a correlation between the properties of haloes and their environment. In this paper, we assess whether the ellipsoidal collapse model can produce a similar dependence. First, we explore the statistical correlation that originates from Gaussian initial conditions. We derive analytic…
Dendrimers provide new and practical solutions to the complex problem of catalyst separation from the product stream. Dendrimers functionalized with active metal complexes are themselves soluble, nanosized catalysts that are capable of combining the high activity and selectivity of classical homogeneous catalysts with…
In this paper, we present a novel strategy for fabricating polyoxometalate (POM)-based photochromic silica hybrid films. To combine metal nanoparticles (NPs) into the POMs embedded silica matrix, furthermore, we realized the controllable in situ synthesis of metal NPs in the film by utilizing the reduction property of…