Materials Literature
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In contradiction to current bonding paradigms, two terminal Au-oxo molecular complexes have been synthesized by reaction of AuCl3 with metal oxide-cluster ligands that model redox-active metal oxide surfaces. Use of K10[alpha2-P2W17O61].20H2O and K2WO4 (forming the [A-PW9O34]9- ligand in situ) produces K15H2[Au(O)(OH2…
Microscopic polymer liquid state theory is employed to study the real space pair correlation functions and collective scattering structure factors of melt polymer nanocomposites composed of hard spheres and adsorbing homopolymers over length scales ranging from monomeric to macroscopic. Increasing filler volume fracti…
Maghemite-Au core-shell nanoparticles incorporated into a polyaniline film associated with an electrode lead to reversible, magnetoswitchable, controlled charge transport across the polymer, and to magnetoswitchable bioelectrocatalysis (see figure).
Abstract Blends of polyamide6 (PA6) and acrylonitrile butadiene styrene (ABS) were prepared in presence or absence of up to 5 wt % of a reactive compatibilizer [styrene maleic anhydride copolymer (SMA) modified with 5 wt % multiwall carbon nanotubes (MWNT)] by melt‐mixing using conical twin screw microcompounder where…
Highly ordered arrays of boron nitride nanotubes (BN-NTs) were prepared for the first time by combining a polymer thermolysis route and a template process. The strategy involves four steps, i.e., synthesis of a liquid polymeric borazine, liquid-phase infiltration of an alumina membrane, thermolysis at 1200 °C under ni…
Abstract Novel apatite‐type silicates are attracting considerable interest as a new family of oxide‐ion conductors with potential use in fuel cells and ceramic membranes. Combined computer modeling and X‐ray absorption (EXAFS) techniques have been used to gain fresh insight, at the atomic level, into the site selectiv…
Abstract A composite material consisting of hydroxide‐modified hemp fibres and euphorbia resin was produced. The composites were tested in tension, short‐beam interlaminar shear stress and in impact. There was an increase in the tensile strength and modulus for resins with high‐hydroxyl‐group based composites. Similar…
Nowadays, the majority of the commercially available calcium phosphate materials is fabricated by 'classical' materials science approaches, i.e., from rather poorly defined slurries or from organic solvents, often at high temperatures and pressures. Bioinspired precipitation of inorganics with (polymeric) additives fr…
Nanocomposites films have been processed from a filler and a matrix having the same nature, i.e. waxy maize starch. The filler consists of nanoplatelet-like starch particles obtained as an aqueous suspension by acid hydrolysis of starch granules and the matrix was prepared by plasticization and disruption of starch gr…
Abstract We describe the development and optimization of porous silicon photonic crystal surface chemistry towards implantable optical devices. Porous silicon rugate filters were prepared to obtain a narrow linewidth reflectivity peak in the near‐infrared (700–1000 nm) with low background reflectivity elsewhere. The m…
Abstract Inorganic nanofillers, CaCO 3 and nanoclay, are widely applied to improve the mechanical properties of polypropylene (PP). In general, the use of spherical CaCO 3 can enhance the impact strength while the use of layered nanoclay can enhance the modulus and yield stress. With the objective to simultaneously im…
Abstract In this study, we report the fabrication of a novel surface with both morphology and composition heterogeneities by casting polymer blend solution. The resultant poly (methyl methacrylate) (PMMA) and amphiphilic polyurethane (A‐PU) surface has a rough structure on microscale and separated hydrophobic and hydr…
Soil is a particulate material and its constituent particles have a wide range of sizes. Nanoparticles of usually 1 to 100 nm are the smallest particles in soil environments and exist in one of the three different forms: nanoplatelets, nanowires or nanotubes, and nanodots. Due to their tiny size, soil nanoparticles us…
Two new noncentrosymmetric (NCS) polar quaternary oxides, TlMVO 5 (M = Se 4+ or Te 4+ ), have been synthesized by hydrothermal techniques using Tl 2 CO 3, SeO 2 (TeO 2 ), and V 2 O 5 as reagents. The structures were determined by single-crystal X-ray diffraction (TlSeVO 5, orthorhombic, space group Pna 2 1 (No. 33) wi…
A novel approach for the preparation of a biotinylated dendrimer-based MRI agent 5 is described, in which a unique disulfide bond in the core of the Gd(III)-1B4M-DTPA chelated G2 PAMAM dendrimer was reduced and then attached to a maleimide-functionalized biotin. The new MRI agent 5 features a well-defined dendron stru…
The mechanism of ferromagnetism stability in sandwich clusters V$_n$(C$_6$H$_6$)$_{n+1}$ has been studied by first-principles calculation and model analysis. It is found that each of the three types of bonds between V and benzene (Bz) plays different roles. V 3d$_{z^2}$ orbital, extending along the molecular axis, is…
We report a detailed spectroscopic study of the pressure-induced neutral-ionic phase transition of the mixed-stack charge-transfer crystal tetrathiafulvalene-chloranil. We show that the pressure induced phase transition is still first-order and involves the presence of an intermediate disordered phase, defined by the…
We investigate numerically various properties of the one-dimensional (1D) breathing-mode polaron. We use an extension of a variational scheme to compute the energies and wave-functions of the two lowest-energy eigenstates for any momentum, as well as a scheme to compute directly the polaron Greens function. We contras…
Abstract We report a facile approach for the spontaneous formation of silver nanoparticles in the presence of gum acacia polymer (a natural polymer) without the addition of any typical reducing agent under mild conditions. Silver nanoparticles (∼ 5 nm) have been obtained by the mixing of equal amounts of 0.5 wt % aque…
Due to the competition between spatial and magnetic confinement, the density of states of a quasi two-dimensional system deviates from the ideal step-like form both quantitatively and qualitatively. We study how this affects the spin-subband populations and the spin-polarization as functions of the temperature, $T$, a…