Materials Literature
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To study long-distance magnetic interactions between exchange-coupled metal centers and coordinated radical moieties, two new homodimetallic Cu(II) complexes held together by the chelating ligand L(nPr) = N,N,N',N'-tetrakis(N-propyl-2-benzimidazolyl)-2-hydroxy-1,3-diaminopropane and additionally bridged by either a ni…
Based on the phase diagram constructed for water-silk fibroin-LiBr using the osmotic stress method, wet-spinning of osmotically stressed, regenerated Bombyx mori silk fibroin was performed, without the necessity of using expensive or toxic organic solvents. The osmotic stress was applied to prestructure the regenerate…
Abstract Blends of polyamide‐6 (PA6) or postindustry polyamide‐6 (piPA6) and high‐density polyethylene (HDPE) or recycled high‐density polyethylene (rHDPE) were processed in single and twin‐screw extruders. The use of rHDPE in the blends promotes a significant decrease of size domains and improvement in the mechanical…
The reaction of cis-[Fe(III)(cyclam)Cl(2)]Cl with 1 equiv of sodium N-diethyldithiocarbamate, toluene-3,4-dithiolate, and maleonitriledithiolate in methanol in the presence of triethylamine afforded the cations [Fe(III)(cyclam)(Et(2)dtc)](2+) (1), [Fe(III)(cyclam)(tdt)](+) (2), and [Fe(III)(cyclam)(mnt)](+) (3), which…
First-principles calculations on the electronic, transport, and lattice vibrational behaviors of Si nanowires (SiNWs) are performed to reveal the origin of the high thermoelectric performance in SiNWs. Our results show that the power factor ( S 2 σ) of SiNWs deviate only slightly from those of bulk Si originating from…
We report the use of polyaniline nanofiber−metal salt composites for the detection of arsine gas (AsH 3 ) using the resistance change of the materials. Aqueous dispersions of polyaniline nanofibers facilitate the preparation of metal salt/polyaniline nanofiber composites with the use of water-soluble inorganics. Vario…
Abstract Photoswitchable DNA‐binding ligands should be useful for controlling diverse biological functions involving DNA and reversible assembly of DNA‐based nanostructures. In work directed towards the development of photoswitchable ligands with various sequence specificities, we have elaborated an efficient synthesi…
Zn(x)Cd(1-x)Se/C core/shell nanocrystals with 31-39 nm semiconducting core and 11-25 nm carbon shell were synthesized from solid state precursors in large scale amounts. A mixture of spherical and tripod nanostructures were obtained only in the one-step reaction (ZC3), where the Zn- and Cd-precursors were reacted simu…
Abstract TiO 2 /SiO 2 sol was intercalated into montmorillonite (MMT), which was pretreated with polyvinylpyrrolidone (PVP). A series of poly(ethylene terephthalate) (PET)/MMT hybrids were prepared using the obtained MMT as polycondensation catalysts. X‐ray diffraction (XRD) results proved that MMT dispersion states c…
Abstract We illustrate the potential of the density matrix theory for investigation of optical properties of arbitrary single‐walled carbon nanotubes (CNTs). We have performed microscopic calculations of excitonic absorption spectra for CNTs of different chiral angles and diameters. The obtained results are in good ag…
The effect of pressure on the segmental dynamics in two symmetric blends of PMPS and PS is studied for pressures up to 250 MPa. In these blends, there is interplay between spinodal decomposition and glass transition, resulting in the enrichment of the high T g component by the more mobile component. The distinctly dif…
Abstract Active nonlinear optical nitro‐substituted thiazole, benzothiazole, and thiadiazole chromophores were prepared and condensed with tolylene‐2,4‐diisocyanate (TDI) and 4,4′‐methylenedi(phenyl isocyanate) (MDI) to yield a series of polyurethanes. The resulting polyurethanes were characterized with Fourier transf…
The author reports on high-density single-crystal pine needle-like selenium (Se) nanocrystals, typically, 1−3 μm in length and 20−90 nm in diameter with an average size of 30 nm, spontaneously grown quasi-vertically up from the substrate surface. The synthesis was performed in flowing argon using a novel type of catal…
Recent progress in dislocation dynamics modeling of work hardening has reawakened the interest in cross-slip, which can lead to dynamic recovery in fcc crystals. It is pointed out that neither continuum theory nor atomic modeling at present are able to reliably derive the reaction path and the activation energy of cro…
We report in this paper the preparation of multilayer films from the layer-by-layer deposition of block copolymer nanofibers bearing carboxyl and amine groups in their coronas. The film formation process was followed by atomic force microscopy and UV absorbance measurements. For the large size of the nanofibers and pr…
Embioptera is a little studied order of widely distributed, but rarely seen, insects. Members of this group, also called embiids or webspinners, all heavily rely on silken tunnels in which they live and reproduce. However, embiids vary in their substrate preferences and these differences may result in divergent silk m…
The effect of gamma irradiation on the optical and sub-bandgap properties of cellulose triacetate (CTA) films is studied. Sellmeier and Wemple–DiDomenico models are used to study the optical dispersion. The refractive index is decreased with increasing irradiation dose, revealing the existence of chain scission. An in…
Multilayer condensed films of trimethyl(methylcyclopentadienyl)-platinum(IV) (MeCpPtMe 3 ) have been exposed to low-energy electrons at incident electron energies of 15, 30, and 500 eV. The reactions occurring under exposure have been investigated using high-resolution electron energy loss (HREEL) spectroscopy. The ob…
Growth of arrays of pagoda-topped tetragonal Cu nanopillar (length 1- 6 mum; width 150 +/- 25 nm) with {100} side faces on Au/glass is achieved by a simple electrochemical reduction of CuCl(2)(aq) by Al(s) in aqueous dodecyltrimethylammonium chloride. Field-emission measurement shows that the Cu nanopillars can emit e…
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