Materials Literature
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By means of a plasma technique, the surfaces of monodisperse polystyrene (PS) colloids have been modified with hydroxyl groups. Using these surface-modified PS colloids as sacrificial templates, we have fabricated silica-coated PS colloids (PS@silica) and titania-coated PS colloids (PS@titania) composite microspheres…
Abstract In a follow‐up study of the cobalt(II) member 1 of a family of isostructural cubane clusters of type [C(NH 2 ) 3 ] 8 [M II 4 (cit) 4 ]·8H 2 O (cit = citrate, M = Mg, Mn, Fe, Co, Ni, Zn) by measuring AC magnetic susceptibilities, as a function of frequency, this compound clearly displays behaviour typical of m…
In this research wood-plastic composite (WPC) panels were produced from high density polyethylene, MDF, and particle-board waste at 60, 70, and 80 wt% fiber loadings using the dry blend/hot press method. Physical and mechanical properties of the panels were studied and compared with conventional MDF and particle-board…
Convection-enhanced delivery (CED) with various drug carrier systems has recently emerged as a novel chemotherapeutic method to overcome the problems of current chemotherapies against brain tumors. Polymeric micelle systems have exhibited dramatically higher in vivo antitumor activity in systemic administration. This…
This paper presents an aqueous route to size-controlled and doped CeO 2 nanoparticles using the Ce-oleate complex as a chemically modified precursor. In this synthesis, a hydrolytic condensation of Ce-oleate complex by aqueous ammonia solution at room temperature leads to 2.2 nm sized CeO 2 nanocrystals. These product…
The creation of Néel domain walls by electric fields in conventional and weak ferromagnets is discussed. In an inhomogeneous electric field the walls move with velocity proportional to the field gradient.
Desymmetrization isn't complex: The substrate scope for vanadium-catalyzed epoxidation has been extended. In addition to various allylic alcohols, homoallylic alcohols can also be desymmetrized by using vanadium/bishydroxamic acid complexes (see scheme; CHP=cumene hydroperoxide).
The ferroelectric state in an orthorhombic perovskite RMnO3 (R=Gd0.7Tb0.3) was proved by neutron scattering studies to show the cycloidal spin state with the ab-spiral plane and the spin-helicity dependent polarization vector along the a axis, sharing the microscopic origin (inverse Dzyaloshinskii-Moriya interaction)…
An intracellular mannanase was identified from the thermoacidophile Alicyclobacillus acidocaldarius Tc-12-31. This enzyme is particularly interesting, because it shows no significant sequence similarity to any known glycoside hydrolase. Gene cloning, biochemical characterization, and structural studies of this novel m…
Nanosilica was used to reinforce the selective laser sintering (SLS) parts of nylon-12. A dissolution—precipitation process was successfully developed to prepare a nanosilica/nylon-12 composite powder (containing 3 wt% nanosilica) for SLS process. The dispersion of nanosilica in the SLS specimens of the composite powd…
We have explored a new strategy to discover materials with large resistive or capacitive responses to magnetic fields by synthesizing EuMO2N (M = Nb, Ta) perovskites that combine ferromagnetic order of S = 7/2 Eu2+ spins with possible off-center distortions of the d0 M5+ cations enhanced by covalent bonding to N. EuNb…
Muon spin rotation experiments were performed on the pnictide high temperature superconductor ${\mathrm{SmFeAsO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}$ with $x=0.18$ and 0.3. We observed an unusual enhancement of slow spin fluctuations in the vicinity of the superconducting transition which suggests that the spin fluctu…
Electron-transfer makes a magnet: 2:1 assembly of [Ru2II,IIL4] paddlewheel complexes and BDTA-TCNQ yielded a new structural type of electron-transfer system with a three-dimensional network structure which exhibits a long-range ferromagnetic transition at Tc=107 K (see depicted χ vs T curve and inset view of structure…
A new class of linear-dendron-like poly(ε-caprolactone)- b -poly(ethylene oxide) (PCL- b -PEO) copolymers with unsymmetrical topology was synthesized via controlled ring-opening polymerization (ROP) of ε-caprolactone (CL) followed by a click conjugation with azide-terminated PEO (PEO-N 3 ). The dendron-like PCL termin…
Discontinuous, island-type gold films (typically < or = 10 nm nominal thickness) prepared by evaporation of the metal on transparent substrates show a localized surface plasmon resonance (LSPR) extinction in the visible-to-NIR range and can be used as optical transducers for monitoring local refractive index change. S…
This paper investigates the effect of sterilisation by gamma irradiation (dose 2.5Mrad) on the following properties of polycaprolactone (PCL): (1) degradation rate (catalysed by lipase), (2) mechanical properties, (3) the ability of cells to attach and subsequently grow on its surface. Gel permeation chromatography (G…
We report inelastic and elastic neutron scattering, magnetic susceptibility, and heat capacity measurements of polycrystalline sodium ruthenate (Na$_3$RuO$_4$). Previous work suggests this material consists of isolated tetramers of $S=3/2$ Ru$^{5+}$ ions in a so-called "lozenge" configuration. Using a Heisenberg antif…
Tb (III)-Cu (II)-based single-molecule magnet (SMM) and non-SMM were synthesized to investigate the relationship between magnetic anisotropy and the symmetry of the ligand field by the reaction of [TbCu( o-vanilate) 2(NO 3) 3] with methoxypropylamine (MeOC 3H 6NH 2, 1) or ethoxyethylamine (EtOC 2H 4NH 2, 2). In both c…
The crystal structure of anodically electrodeposited MnO 2 nanocrystals can be manipulated by introducing complexing agents in the electrodeposition solutions. MnO 2 nanocrystals with three types of crystal structures were observed: hexagonal ε-MnO 2 (complex-free), defective rock salt MnO 2 (ethylenediaminetetraaceti…
We have used time-resolved luminescence methods to study rates of photoinduced energy transfer (PEnT) from [M(bipy)3]2+ (M=Ru, Os) chromophores to Ln(III) ions with low-energy f-f states (Ln=Yb, Nd, Er) in d-f dyads in which the metal fragments are separated by a saturated -CH2CH2- spacer, a p-C6H4 spacer, or a p-(C6H…