Materials Literature
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We encapsulated cisplatin into stealth pH-sensitive liposomes and studied their stability, cytotoxicity and accumulation in a human small-cell lung carcinoma cell line (GLC4) and its resistant subline (GLC4/CDDP). Since reduced cellular drug accumulation has been shown to be the main mechanism responsible for resistan…
We report a simulated annealing study of the morphology of block copolymer brushes in selective solvents. The investigation is carried out with a lattice model, in which the ends of A-blocks of monodisperse linear AB diblock copolymer flexible chains are grafted regularly on a flat substrate plane with an equal “spaci…
Hollow nanoparticles (bionanocapsules) were prepared using liposomes as a template for the layer-by-layer deposition of biopolymers. We carried out the alternative deposition of poly- l -lysine (P Lys ) and poly- l -aspartic acid (P Asp ) onto a negatively charged liposome, which was prepared from dilauroyl phosphatid…
The interaction of oxygen with line defects of Ti interstitials on a $\mathrm{Ti}{\mathrm{O}}_{2}(110)$ surface is investigated using scanning tunneling microscopy (STM) measurements and first-principles calculations. Ab initio molecular dynamics calculations show that an oxygen molecule dissociatively adsorbs on a ro…
Polycarbonate (PC) and phenoxy resin (PKFE) have similar structures derived from bisphenol A. PKFE resin possesses pendant hydroxyl groups along its backbone; instead of the carbonate carbonyl groups found in polycarbonate, PKFE contains 2-hydroxypropyl groups instead. This difference in structure significantly influe…
The photochromicity of fulgimides rests on the existence of open (E) and closed ring (C) isomers. As predicted by the Woodward-Hoffmann rules both isomers can photochemically be interconverted. This interconversion has been studied by femtosecond fluorescence and transient absorption spectroscopy. For either direction…
Reactions of [W(CN)(8)](3-/4-) anions with complexes of Mn(2+) ion with tridentate organic ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) lead to a series of heterobimetallic complexes. The crystal structures of these compounds are derived from the same basic structural fragment, namely a W(2)Mn(2) square construc…
This study presents the kinetic sorption behavior of six different gases (CO 2, C 3 H 8, C 3 H 6, Xe, Kr, and Ar) in films of the glassy polyimide Matrimid using a magnetic suspension balance. The dynamic mass uptake was analyzed using a model discriminating and quantifying separate contributions of Fickian diffusion…
Ion-selective quantum dots (ISQDs) have been produced that are capable of measuring physiologically relevant ions (such as Na +, K +, Cl -, etc.). ISQDs consist of quantum dots, an ion-selective polymer matrix, and a biocompatible coating. ISQDs work by selective ion extraction by the polymer matrix which leads to a c…
Key aspects of foaming and its mitigation in fermentation systems are presented. Foam properties and behavior, conditions that affect foaming, and consequences of foaming are discussed, followed by methods to detect and prevent foam, both without and with the use of antifoam, and their implications. Antifoams were cat…
X-ray absorption spectroscopy (XAS) on the Pt and Au L 3 edges showed that the structure of platinum and gold nanoclusters differs from that of the bulk metals. The interatomic distances are contracted and the s, p, and d orbitals rehybridize, which results in less filled 5d valence bands. The XAS spectra of the monom…
The crystal structure and magnetotransport properties of the A-site ionic ordered state in Pr(0.70)Ba(0.30)MnO(3+δ) (δ = 0, 0.025) have been investigated. It is shown that such a state can be formed in complex manganites with cation ratios [Formula: see text] by using a 'two-step' reduction-reoxidization method. The p…
Four helical semiconductor framework materials assembled from chalcogenide II−VI nanoclusters have been synthesized and characterized. These cadmium sulfide clusters form intertwined helical assemblies from helices of either the same handedness or the opposite handedness, resulting in the crystallization of cluster-de…
Abstract Eight novel polyurethanes based on 2,2′‐[1,4‐phenylenebis(nitrilomethylylidene)]diphenol and 2,2′‐[4,4′‐methylene‐di‐2‐methylphenylene‐1,1′‐bis(nitrilomethylylidene)]diphenol acting as hard segments with two aromatic and two aliphatic diisocyanates (4,4′‐diphenylmethane diisocyanate, toluene 2,4‐diisocyanate,…
The location of palladium nanoparticles on and inside the multiwalled carbon nanotubes channel is presented for the first time using electron tomography (3D TEM). The palladium salt precursor was rapidly sucked inside the nanotube channel by means of capillarity that is favored by the hydrophilic character of the tube…
Abstract The refractive index, a most fundamental quantity in optics and optoelectronics, determines many figures of merit of optical components such as reflectors, filters, and resonators. Here we present a new class of optical thin‐film materials that have a very low refractive index. Specular films of high optical…
Photoinduced magnetization dynamics is investigated in chemically ordered $(\mathrm{LaMnO}_3)_{2n}/(\mathrm{SrMnO}_3)_n$ superlattices using the time-resolved magneto-optic Kerr effect. A monotonic frequency-field dependence is observed for the $n=1$ superlattice, indicating a single spin population consistent with a…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The synthetic hydrotalcites with Mg/Al molar ratios of 2.0−3.5 were synthesized by coprecipitation method at low supersaturation conditions followed by hydrothermal treatment under autogenous water vapor pressure at 70−140 °C. These synthesized samples were characterized by powder X-ray diffraction (P-XRD), Fourier tr…
Molecular dynamics (MD) simulations under transverse shear, uniaxial compression, and pullout loading configurations are reported for multiwall carbon nanotubes (MWCNTs) with different fraction of interwall sp3 bonds. The interwall shear coupling in MWCNTs is shown to have a strong influence on load transfer and compr…