Materials Literature
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The ligand 1,3-bis[3-oxo-3-(2-hydroxyphenyl)propionyl]benzene (H(4)L), designed to align transition metals into tetranuclear linear molecules, reacts with M(II) salts (M=Ni, Co, Cu) to yield complexes with the expected [MMMM] topology. The novel complexes [Co(4)L(2)(py)(6)] (2; py=pyridine) and [Na(py)(2)][Cu(4)L(2)(p…
A thermodynamically stable $I\overline{4}m2$ phase of superhard ${\text{BC}}_{5}$ was predicted from exhaustive structural searches combined with first-principles structural optimizations. From the computed bulk and shear moduli, this phase is expected to be harder than the recently synthesized ${\text{BC}}_{5}$ with…
The oxodiperoxo complex MoO(O2)(2)(tbbpy) (tbbpy = 4,4'-di-tert-butyl-2,2'- bipyridine) was isolated from the reaction of MoO2Cl(2)(tbbpy) in water under microwaveassisted heating at 120 masculineC for 4 h. The structure of the oxodiperoxo complex was determined by single crystal X-ray diffraction. The Mo(VI) centre i…
The transition to lead-free soldering of printed circuit boards (PCBs) using solder alloys such as SnAgCu has resulted in higher temperature exposures during assembly compared with eutectic SnPb solders. The knowledge of PCB laminate material properties and their dependence on the material constituents, combined with…
Physicochemical and functional properties of two chitosan products [low viscosity (LV) with 16.8 mPa s; high viscosity (HV) with 369.4 mPa s] were evaluated during 9-month storage at room temperature. As storage time increased, increased moisture content and DPPH radical scavenging activity and decreased viscosity and…
In the present study, an extensive investigation of the molecule−surface interaction in hybrid systems formed by phthalocyanines (Pcs) and inorganic semiconductors (IS) has been performed by using ab initio theoretical methods. The aim of this study is to provide a framework to design effectively coupled Pcs/IS system…
We present measurements of the thermal expansion coefficient $\ensuremath{\alpha}$ of polycrystalline ${\text{LaFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ $(x\ensuremath{\le}0.1)$. The magnetic and structural transitions of the samples with $x\ensuremath{\le}0.04$ give rise to large anomalies in $\ensuremath{\alpha}(T)…
High-frequency electron paramagnetic resonance (HFEPR) and alternating current (ac) susceptibility measurements are reported for a new high-symmetry ${\text{Mn}}_{12}$ complex, $[{\text{Mn}}_{12}{\text{O}}_{12}{({\text{O}}_{2}{\text{CCH}}_{3})}_{16}{({\text{CH}}_{3}\text{OH})}_{4}]\ensuremath{\cdot}{\text{CH}}_{3}\tex…
A series of planar model catalysts have been prepared via deposition of Ir(n) (+) on thermally grown amorphous SiO(2)/Si(100) and ion scattering spectroscopy was used to probe surface structure as a function of cluster size, impact energy, and surface temperature. Deposition of Ir(2) or Ir(10) at low energies and room…
The efficiency of poly(ε-caprolactone) (PCL) as a matrix polymer for cellulose nanocomposites has been investigated at the macromolecular contact level using atomic force microscopy in a colloidal probe configuration. Model cellulose microspheres grafted with PCL were prepared via ring-opening polymerization. Force me…
Morphabulous: Heterogeneous catalysts often consist of nanosized metal or metal oxide particles and the morphology of these crystals is crucial to their performance. By controlling the synthetic conditions, the shape of the crystals can be varied, which affects the exposed surfaces and ultimately influences the proper…
We theoretically investigate resonant tunneling through S- and U-shaped nanostructured graphene nanoribbons. A rich structure of resonant tunneling peaks is found emanating from different quasi-bound states in the middle region. The tunneling current can be turned on and off by varying the Fermi energy. Tunability of…
We describe the gelation, upon self-assembly of a series of nonchiral molecules, resulting in tubular morphology of the fibers. These are biscarbamates, which are model compounds for polyurethanes with two hydrogen bonding groups separated by a (CH(2))(6) spacer and symmetrically substituted with alkyl chains on eithe…
Resonance Raman (RR) spectroscopy and density functional theory (DFT) calculations of oxochromium(IV,V) derivatives of 5,10,15-tris(pentafluorophenyl)corrole (tpfpc) are shown to provide useful information about the relative strength of the metal-oxo bond in high-valent Cr(IV) versus Cr(V) corroles. Isotope labeling o…
The ability to control the processing of artificial silk is key to the successful application of this important and high performance biopolymer. Understanding where our current reconstitution process can be improved will not only aid us in the creation of better materials, but will also provide insight into the natura…
The effects of atmospheric air-plasma treatments on woven polyester (PET) textile structures were studied by surface analysis methods: zeta potential, X-ray photoemission spectroscopy (XPS), wettability and capillarity methods. The zeta potential of the fabrics was based on the established principles of streaming pote…
Abstract Syntactic foams containing 60 vol% of hollow glass microballoons in epoxy matrix are modified with untreated nanoclays using combined mechanical and ultrasonication methods. Effects of nanoclays on flexure and thermal behavior of syntactic foams are investigated by adding different amount of nanoclays in the…
Wunschfarben: Monodisperse rechtwinklig-dreieckige Silber-Bipyramiden (siehe SEM-Bild) wurden durch photoinduzierte Synthese in hohen Ausbeuten erhalten. Die Kantenlänge der Bipyramiden lässt sich einfach über die Wellenlänge des Anregungslichts steuern (siehe Diagramm).
Abstract The aim of this study is to investigate the effect of hexagonal boron nitride (BN) particle shape/size and loading level on the thermal, mechanical, electrical properties, and morphology of styrene‐ethylene‐butylene‐styrene terpolymer (SEBS)/poly(ethylene‐ co ‐vinyl acetate) (EVA) blends to be used as thermal…
The reverse micelle sol-gel method was used earlier to prepare silica nanotubes, in aerosol OT/n-heptane/water microemulsions containing FeCl(3). The present communication reports the remarkable effect of the amount of water in the microemulsions on the shape, size, and spectral properties of the silica nanostructures…