Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTElucidating the Formation of Block Copolymer Nanostructures on Patterned Surfaces: A Self-Consistent Field Theory StudyXianggui Ye†‡, Brian J. Edwards*†‡, and Bamin Khomami*†‡View Author Information† Materials Research and Innovatio…
Cationic ionenes that bear electron-rich 1,5-dialkoxynaphthalene (DAN) units within the alkylene segment were allowed to interact with different types of electron-deficient, acceptor-containing molecules in an effort to realize intercalation-induced folding of the ionenes; the collapse of the chains was expected to oc…
Previous literatures have all emphasized that the successful control of microstructure homogeneity of ZTA (ZrO 2 toughened Al 2 O 3 ) composites can only be achieved provided that the ZrO 2 particles are homogeneously distributed and the volume content exceeds 5 vol%. In this paper, we report our strategy to incorpora…
Three-dimensional structures derived from X-ray diffraction of protein crystals provide a wealth of information. Features and interactions important for the function of macromolecules can be deduced and catalytic mechanisms postulated. Still, many questions can remain, for example regarding metal oxidation states and…
The silver-copper mixed oxide AgCuO(2) (also formulated as Ag(2)Cu(2)O(4)) possesses a peculiar electronic structure in which both Ag and Cu are partially oxidized, with the charge being delocalized among the three elements in the oxide. Accordingly, a quasi-metallic behavior should be expected for this oxide, and ind…
Abstract A new reactive extrusion process for the production of controlled‐rheology polypropylene (CRPP) has been developed. Instead of the traditionally used peroxides, this process employs a photoinitiator and an ultraviolet (UV) lamp. Experiments have been carried out in a corotating intermeshing twin‐screw extrude…
Bridging the gap: A series of meso-to-meso pyrrole-bridged cyclic porphyrins were prepared by a one-pot Suzuki–Miyaura coupling reaction (see figure). The 1H NMR spectra of these compounds revealed their highly symmetric structures in solution, and the solid-state structures of nickel and zinc derivatives were determi…
We report the design and fabrication of a wedge structured CLC film incorporating a spatial gradient of a chiral dopant concentration. A continuous spatial laser tuning in the broad visible spectral range with tuning resolution less than 1 nm is demonstrated, which renders a CLC-based micron-sized laser an important c…
Abstract Photodegradation of plasticized poly(vinyl chloride) (PVC) stabilized by different thermal stabilizers including organic calcium complex and mercaptide organotin was investigated. Plasticized PVC sheets prepared by an open twin‐roller mill and plate vulcanizing machine were exposed to xenon‐arc light with the…
Directed assembly of polymer blends using chemically heterogeneous patterns during spin-coating can be used to produce nanopatterned polymer structures. Well-ordered morphologies are obtained when the characteristic length of a polymer blend is commensurate with pattern periodicity. In this paper, spin-coating speed a…
The resolution of stereoisomers of C21-alkylated nickel(II) complexes of N-confused porphyrin (NCP) was performed by means of chiral-phase HPLC with an effectiveness of above 90 % molar ratio for each isomer. The reverse signs of the Cotton effects in the circular dichroism (CD) spectra of the separated fractions are…
Achteckiger Grundriss: Die Struktur von einkristallinen Goldnanostäben wurde aufgrund hochauflösender Transmissionselektronenmikroskopie-Untersuchungen an stehenden Stäben umgedeutet. Die Studien ergaben acht identische, hoch indizierte {250}-Seitenflächen (TEM-Bild und vorgeschlagenes Modell).
Chemoselective microwave-assisted transesterification of 6,1-lactone derived from glucuronic acid is catalyzed by reusable Dawson-type polyoxometalates. These catalysts allow the formation of pseudo-disaccharides from easily available precursors. This permits the expeditious assembly of promising building blocks from…
The nanometric mixed tin-titanium oxide doped with a M(5+) cation was recently shown as a promising thermoelectric material. We report here synthesis of novel molecular precursors for above material using a convenient approach of reacting a metal chloride with a metal alkoxide. Heterometallic complexes with simple add…
On the basis of the glass network structure and spectroscopy information, the full‐color‐emitting borophosphate glasses doped/codoped with Eu 2+ and Mn 2+ ions were synthesized, and their photoluminescence (PL) properties were evaluated. The interaction of Mn 2+ –Mn 2+ pairs shifts its emission to longer wavelength wi…
This book presents a complete account of the theory of the diffraction of X-rays by crystals with particular reference to the processes of determining the structures of protein molecules. The book develops from first principles all relevant mathematics, diffraction, and wave theory. The practical aspects of sample pre…
We theoretically investigate the subterahertz ac response of submicron metallic single-walled carbon nanotube connected to electrodes using the nonequilibrium Green's-function method. We find that the ac response shows remarkable chirality dependence in the presence of the contact resistance at the nanotube/electrode…
Abstract It is reviewed that the structural information obtained from high‐resolution electron microscope images can be greatly improved by utilizing a group of analysis methods developed based on an image‐contrast theory derived particularly to show the image‐intensity change with the sample thickness. It is introduc…
The Hamiltonian of an optical medium is important in both the design and the description of optical devices in the geometrical optics limit. The results calculated in this article show in detail how ray tracing in anisotropic materials in arbitrary coordinate systems and curved spaces can be carried out. Writing Maxwe…
Human LDL undergoes a reversible thermal order-disorder phase transition associated with the cholesterol ester packing in the lipid core. Structural changes associated with this phase transition have been shown to affect the resistance of LDL to oxidation in vitro studies. Previous electron cryo-microscopy studies hav…