Materials Literature
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Poly(vinylidene fluoride) (PVDF) and poly(butylene succinate-co-butylene adipate) (PBSA) are crystalline/crystalline polymer blends with PVDF being the high-T(m) component and PBSA being the low-T(m) component, respectively. PVDF/PBSA blends are miscible as shown by the decrease of crystallization peak temperature and…
Abstract Flexible films of poly(vinyl chloride) (PVC) and linear or branched poly(butylene adipate) (PBA), synthesized from 1,4‐butanediol and adipic acid or dimethyl ester of adipic acid, were aged in an aqueous environment for 10 weeks to study how branching, molar mass, and end‐group functionality affect the leachi…
Abstract Either light or electricity can be used to trigger the reversible cyclization reactions of three bis( N ‐methylpyridinium)dithienylethene derivatives that differ from each other by the presence of either thiophene rings or methyl groups at the two carbon atoms of the photoresponsive hexatriene system involved…
Abstract In this article, mechanical performance of isothalic polyester‐based untreated woven jute‐fabric composites subjected to various types of loading has been experimentally investigated. The laminates were prepared by hand lay‐up technique in a mold. Specimens for tests were fabricated as per ASTM standards. All…
Marked for life. For the characterization of larger proteins new NMR spectroscopy methods that focus on side-chain methyl groups have been developed by using selectively isotope-labeled precursor compounds. Here we report on the synthesis of a 13C-methyl-group-labeled methionine precursor on a preparative scale, and i…
Abstract A novel diatomite composite superabsorbent was synthesized by solution polymerization of partially neutralized acrylic acid and diatomite, using N,N′‐methylenebisacrylamide as a crosslinking agent and hydrogen peroxide and L ‐ascorbic acid as a redox initial system. The influences of some reaction conditions,…
Using density functional theory we studied systematically a Au atom adsorption on a Mo-supported regular and defected ultrathin MgO film with 1 to 5 ML thickness. On Mo(100) grown regular MgO Au prefers to adsorb at a hollow site instead of an O site found for single-crystal MgO. The metal support also enhances Au ads…
A bifunctionalized polyelectrolyte multilayer film (PEM film) that can drive embryonic stem cells to cartilage or bone differentiation is presented. A model system is constructed from a PEM film into which transforming growth factor β1 and bone morphogenetic protein has been embedded. The synergy between both factors…
We report the fabrication of microporous thin film membranes with two-dimensionally arranged submicron pores whose size can be varied by changing pH of aqueous medium. A solution containing poly(2-vinylpyridine) partially quaternized with 1,4-diiodobutane (qP2VP) and unreacted 1,4-diodobutane (DIB) was used for the fo…
We report a joint theoretical and experimental study of low-lying structures and structural transitions of gold cluster anions Au n - in the size range of n = 21−25. Well-resolved photoelectron spectra are used to compare with density functional theory calculations and to identify the low-lying structures of the gold…
Abstract The silicone rubber with good thermal conductivity and electrical insulation was obtained by taking vinyl endblocked polymethylsiloxane as basic gum and thermally conductive, but electrically insulating hybrid Al 2 O 3 powder as fillers. The effects of the amount of Al 2 O 3 on the thermal conductivity, coeff…
Walls that build themselves: Long-range nanowalls assemble with uniform tetragonal Mn3O4 nanoparticles by a simple solution-phase synthesis method under low temperature and surfactant-free conditions (see image). The magnetization of the sample is investigated. A mechanism for formation of the wall-like crystals is su…
We have systematically investigated the phase diagram of clay particles in water to understand the relation between the local and macroscopic properties and the structures of clay suspensions. We focused, in particular, on sodium Cloisite (CNa) particles at concentrations typically used in nanocomposites (concentratio…
Prompted by our interest in new photochromic organic-inorganic hybrid materials, the reactivity of [Mo7O24]6- toward a structure-directing reagent diamine such as 1,4-diazabicyclo[2.2.2]octane (DABCO) and piperazine (pipz) has been investigated, and three new molybdenum(VI)-containing compounds, namely, (H2DABCO)3[Mo7…
The dielectric response of various series of cross-linked and non-cross-linked solution-styrene-butadiene-rubber and/or carbon black composites is investigated in the frequency range from $0.1\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}$ up to $10\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}$. Two types of rubber, differing in vi…
La2Mo2O9 (LAMOX) is a fast oxygen ion conductor which shows high oxygen ion conductivities comparable to those of yttria-sabilized zirconia (YSZ) . LAMOX is subject to a structural phase transition from the non-conductive monoclinic form to the highly-conductive cubic form at about 580C. The origin of the conductivity…
Using single-particle pseudopotential and many-particle configuration interaction methods, we compare various physical quantities of (In,Ga)As/GaAs quantum dot molecules (QDMs) made of dissimilar dots (heteropolar QDMs) with QDMs made of identical dots (homopolar QDMs). The calculations show that the electronic struct…
We report on the direct visualization of chirality changes in carbon nanotubes by mapping local changes in resonant RBM phonon frequencies with an optical resolution of 40 nm using near-field Raman spectroscopy. We observe the transition from semiconducting-to-metal and metal-to-metal chiralities at the single nanotub…
A direct and environmentally friendly synthesis method was developed to produce aqueous CdS quantum dots (QDs) at room temperature. The transmission electron microscopy (TEM) and X-ray diffraction (XRD) results showed the small size and the cubic zinc blende structure of the nanocrystals. The quantum yield was compara…
A Dy(III)4Mn(III)6 complex with a metallacrown (MC)-like topology possesses frequency-dependent magnetic behavior, indicating possible single-molecule magnet behavior.