Materials Literature
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Changes to the structure of polystyrene melt films as measured through the spectrum of density fluctuations have been observed as a function of film thickness down to the polymer radius of gyration (Rg). Films thicker than 4Rg show bulklike density fluctuations. Thinner films exhibit a peak in S(q) near q=0 which grow…
The electrostatically driven binding dynamics of a polyelectrolyte multilayer (PEMU) film was investigated in real-time using dual-beam polarization interferometry (DPI) and independently supported by quartz crystal microbalance with dissipation monitoring (QCM-D) studies. Multilayer assemblies of the polyanions poly[…
(Yb x Gd 1− x ) 2 Zr 2 O 7 (0≤ x ≤1.0) ceramic powders synthesized with the chemical‐coprecipitation and calcination method were pressureless‐sintered at 1550–1700°C to develop new thermal barrier oxides with a lower thermal conductivity than yttria‐stabilized zirconia ceramics. (Yb x Gd 1− x ) 2 Zr 2 O 7 ceramics exh…
This paper analyzes the different contributions to the magnetic coupling in systems with more than one unpaired electron per center. While in S=12 spin systems the Heisenberg Hamiltonian involving only bilinear exchange interactions is reliable for the description of the magnetic states, biquadratic exchange interacti…
The concept of cyanine has been successfully extended to an anionic heptamethine dye featuring tricyanofuran (TCF) moieties in terms of structure, reactivity, and photophysical properties. Importantly, absorption and emission are red-shifted compared to its classical cationic analog without any cost in terms of therma…
We investigate a two-dimensional colloidal system when quenched from the isotropic fluid phase into the crystalline phase. In thermal equilibrium one finds two continuous phase transitions with a hexatic phase in between the fluid and the crystalline phase. Here, no indications of this anisotropic fluid are observed i…
One ZM61 alloy (6·2%Zn, 1·2%Mn) and two magnesium alloys containing nominally 3% of neodymium and yttrium respectively have been prepared in the form of hot extruded flat strips. Their textures and microstructures have been quantified and series of mechanical tests were carried out to determine plane stress yield loci…
Abstract New lanthanoid selenidostannates [Hdien][Ln(dien) 2 (μ‐SnSe 4 )] [Ln = Sm ( 1 ), Eu ( 2 ); dien = diethylenetriamine] were solvothermally prepared by reaction of Ln 2 O 3 (Ln = Sm, Eu) with Sn and Se in dien. The structures of 1 and 2 consist of the tetraselenidostannate anion [SnSe 4 ] 4– coordinating to a […
The reaction enhancement mechanism of methane steam reforming (MSR) in the nonthermal discharge and catalyst hybrid reaction is presented. Coke deposited on Al 2 O 3 -supported Ni catalyst was investigated using temperature-programmed oxidation (TPO) analysis and micro-Raman spectroscopy. Although methane conversion i…
Nondegradable synthetic polymer vascular grafts currently used in cardiovascular surgery have no growth potential. Tissue-engineered vascular grafts (TEVGs) may solve this problem. In this study, we developed a TEVG using autologous bone marrow-derived cells (BMCs) and decellularized tissue matrices, and tested whethe…
We study the scattering parameters of typical transmission line resonant circuits and their corresponding nonlocal effective material parameters at optical frequencies using transmission line theory. We find that each circuit has specific features in terms of nonlocal permittivity and permeability and can be utilized…
Irradiation of alcohols, phenols, and carboxylic acids "caged" with the (3-hydroxy-2-naphthalenyl)methyl group results in fast (k(release) approximately = 10(5) s(-1)) release of the substrates with good quantum (Phi = 0.17-0.26) and chemical (>90%) yields. The initial byproduct of the photoreaction, 2-naphthoquinone-…
We propose a new way to determine weak repulsive forces operative between colloidal particles by measuring the rate of slow coagulation. The rate of slow coagulation is directly related to the competition of the repulsion with thermal motion. Since the thermal forces are weak, measurements of the coagulation rate can…
We have synthesized the cyclic Ti 9 Keggin trimers [(alpha-Ti 3PW 9O 38) 3(PO 4)] (18-) ( 1) and [(alpha-Ti 3SiW 9O 37OH) 3(TiO 3(OH 2) 3)] (17-) ( 2), which are both composed of three (Ti 3XW 9O 37) units (X = P or Si) linked via three Ti-O-Ti bridges and a capping group, which is either tetrahedral PO 4 ( 1) or octa…
Either an S 8 symmetrical 48-membered hexadecanuclear or an S 10 symmetrical 60-membered icosanuclear manganese metallamacrocycle was self-assembled using a manganese ion and a ditopic pentadentate ligand. This was either N-4-phenylbenzoylsalicylhydrazide (H 3pbshz) containing a rigid rod-shaped, bulky biphenyl residu…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTChain Entropy and Wetting Energy Control the Shape of Nanopatterned Polymer BrushesAlain M. Jonas*†§, Zhijun Hu†, Karine Glinel‡∥, and Wilhelm T. S. Huck*‡View Author Information Research Center in Micro- and Nanoscopic Materials and De…
Three hot‐pressed ZrB 2 ‐based ultra‐high‐temperature ceramic composites (UHTCC), ZrB 2 –SiC p (ZS), ZrB 2 –SiC p –C (ZSC), and ZrB 2 –SCS9A (SiC fiber)–SiC p (ZSS), were joined to Cu–clad–Mo using AgCuTi brazes ( T L ∼1073–1173K) and Pd‐base brazes ( T L ∼1493–1513K). More extensive chemical interactions occurred in…
Abstract Electrospinning has been extensively explored as a simple and versatile method for drawing fibers. The nanofibers are usually collected as nonwoven mats. The results presented in this article show that the electrospun nanofibers can be uniaxially aligned by introducing two nonconductive ferrite magnets collec…
The syntheses, structures, and magnetic properties of the compounds of formula [Fe (III)(sal 2trien)] 2[Mn (II) 2(ox) 3].4H 2O.C 3H 7NO ( 1) and [In (III)(sal 2trien)] 2[Mn (II) 2(ox) 3].3H 2O.CH 3OH (2) are reported. The structure presents a homometallic 2D honeycomb anionic layer formed by Mn (II) ions linked throug…
Abstract Nanofibrous biocomposite scaffolds of chitosan (CS), PVA, and hydroxyapatite (HA) were prepared by electrospinning. The scaffolds were characterized by FTIR, SEM, TEM, and XRD techniques. Tensile testing was used for the characterization of mechanical properties. Mouse fibroblasts (L929) attachment and prolif…