Materials Literature
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Polarization-resolved optical spectra of magnesia-supported gold clusters ${\mathrm{Au}}_{N}∕\mathrm{Mg}\mathrm{O}$ $(N=1,2,4,8)$, bound at a surface color center ${F}_{s}$ of the MgO(100) face, are calculated from the time-dependent density functional theory. The optical lines for $N=1,2$ are dominated by transitions…
Abstract Summary: Self‐supported and MgCl 2 ‐supported Ziegler‐Natta catalysts, produced by two catalyst synthesis methods are compared. Borealis Polymers OY (Finland), who supplied the catalysts, developed the catalyst synthesis methods. The first method (Method One) is based on an emulsion system and consists of an…
We discuss a generic mechanism for shear thickening analogous to entropy-driven phase reentrance. We implement it in the context of nonrelaxational mean-field glassy systems: although very simple, the microscopic models we study present a dynamical phase diagram with second- and first-order stirring-induced jamming tr…
Abstract Summary: Applying a dialysis process, new nanoparticles based on well‐defined dextran esters of furan‐2‐carboxylic‐ and pyroglutamic acids were prepared, which can undergo cross‐linking by UV irradiation. The highly functionalized products (total DS > 2) avoid the collapse of nanoparticles due to the preve…
Aliphatic segmented poly(ester amide)s, comprising a crystallizable amide phase and a flexible amorphous ester phase, were investigated for potential use in biomedical applications. By varying the amide content and the type of crystallizable amide segments, the polymer's thermal and mechanical properties can readily b…
A novel nickel beta-diketonate adduct, Ni(tta)2.tmeda, has been synthesized using 2-thenoyltrifluoroacetone as the beta-diketonate and N,N,N,'N'-tetramethylethylendiamine as the Lewis base. It has been characterized by elemental analyses, IR, 1H NMR, 13C NMR spectroscopy and single-crystal X-ray diffraction studies. P…
A versatile patterning approach based on electron-beam lithography (eBL) and solution deposition, termed soft-eBL, has been developed to fabricate radially stacked heterostructures of multifunctional oxides from their sol precursors. Well-defined nanorings of lead zirconate titanate (PZT) are fabricated on a variety o…
Abstract Summary: Amorphous and crystallized poly( L ‐lactic acid) (PLLA‐A and PLLA‐C, respectively) films with different contents of N , N , N′ , N′ ‐tetramethyl‐1,4‐phenylenediamine (TMPD) as a photosensitizer were prepared, and the effects of the addition of TMPD on the photodegradation of PLLA films were investiga…
Loaded dice: Copper cubanes 1 and ent-1 were generated in a one-pot reaction by diastereoselective self-assembly, starting from ligands derived from L- and D-tartaric acid, respectively. Both structures were confirmed by X-ray structure analysis.
Abstract Phosphorous‐containing epoxy resins were prepared from diglycidyl ether of isobutyl bis(hydroxypropyl)phosphine oxide (IHPOGly) and diglycidyl ether of bisphenol A (DGEBA) by crosslinking with 2,4‐diaminotoluene. Several IHPOGly/DGEBA molar ratios were used to obtain materials with different phosphorous conte…
Zinc nitride nanowires can be synthesized by nitridation reaction of zinc powder with ammonia gas in 500ml∕min at the nitridation temperature of 600 °C for 120 min. Studies by using x-ray diffraction indicate that zinc nitride nanowires are cubic in structure with the lattice constant a=0.9788nm. Observations by using…
The synthesis and crystal structures of a family of decametallic Cr(III) "molecular wheels" are reported, namely [Cr10(OR)20(O2CR')10] [R' = Me, R = Me (1), Et (2); R' = Et, R = Me (3), Et (4); R' = CMe3, R = Me (5), Et (6)]. Magnetic studies on 1-6 reveal a remarkable dependence of the magnetic behaviour on the natur…
In a twist: Encapsulation of a nine-residue peptide (Trp-Ala-Glu-Ala-Ala-Ala-Glu-Ala-Trp) within a bowl-shaped coordination host in water induces and stabilizes the α-helical conformation. The α-helical peptide is recognized through two types of host–guest interactions: a hydrophobic interaction with both terminal Trp…
Abstract The present article summarizes an experimental study on the molten viscoelastic behavior of PP/jute composites under steady and dynamic mode. Variations in melt viscosity and die swell of the composites with an increase in shear rate, fiber loading, and coupling agent concentration have been investigated usin…
We have investigated polarized Raman spectra of (001)/(100)-oriented tetragonal epitaxial Pb(ZrxTi1−x)O3 (PZT) thin films (x=∼0.35) in which the volume fraction of the polar c domain is systematically varied from 4% to 96%. From polarization analyses using high epitaxial quality films, we have successfully isolated th…
Highly conducting transparent thin films of aluminium(Al)-doped zinc oxide (ZnO:Al) were deposited by a radio frequency magnetron-sputtering technique using an argon and hydrogen gas mixture at room temperature. Hydrogen serves as a shallow donor and plays a critical role in improving the Al doping efficiency to enhan…
Abstract Summary: Surface‐enhanced Raman scattering (SERS)‐active substrates with high enhancement were prepared by an in situ reduction method. Novel silver/poly(vinyl alcohol) (PVA) nanocomposite films were obtained, in which the silver nitrate, poly( γ ‐glutamic acid) (PGA), and PVA acted as precursor, stabilizer,…
The electronic structure of the prototypical $p$-type transparent conducting oxide $\mathrm{Cu}\mathrm{Al}{\mathrm{O}}_{2}$ has been studied by O K and Cu ${\mathrm{L}}_{3}$ shell x-ray absorption and emission and $\mathrm{Al}\phantom{\rule{0.2em}{0ex}}K\ensuremath{\alpha}$ excited x-ray photoemission spectroscopy. Th…
Nanocrystalline powders and ceramics with controlled grain size from 15 to 3000 nm of ${\mathrm{PbMg}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}(\mathrm{PMN})$ and ${(\mathrm{PMN})}_{0.65}\text{\ensuremath{-}}{({\mathrm{PbTiO}}_{3})}_{0.35}\phantom{\rule{0.3em}{0ex}}(\mathrm{PMN}\text{\ensuremath{-}}\mathrm{PT}35)$ hav…
Abstract In this study, form‐stable phase change material (PCM)–high density polyethylene (HDPE)/paraffin hybrid with different flame‐retardant systems are prepared by using twin‐screw extruder technique. This kind of form‐stable PCM is made up of paraffin (a dispersed phase change material) and a HDPE (a supporting m…