Materials Literature
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Polar ZnO surfaces with O- and Zn-termination were studied with atomic and lateral force microscopy and force curves. Adsorbed fluid layers on both surfaces are found to dominate their adhesion properties in air. The hydrophilic O-surface has a substantially thicker adsorbed layer and larger residual particle densitie…
Simulations of the $\mathrm{Te}$ $K$ and ${L}_{3}$-edge XANES in an ${\mathrm{Nb}}_{2}{\mathrm{Te}}_{4}{\mathrm{O}}_{13}$ crystal are found to be in good agreement with experimental data for a large variety of tellurite crystals and glasses. The near-edge structure of the $\mathrm{Te}$ $K$ and ${L}_{3}$ edge is found…
Nanostructures enhance phonon scattering and improve the figure of merit of thermoelectric materials. Nanosized CoSb(3) skutterudite was synthesized by solvothermal methods using CoCl(2) and SbCl(3) as the precursors. A "two-step" model was suggested for the formation of CoSb(3) based on the X-ray diffraction analysis…
Abstract The morphology of high‐density polyethylene (HDPE)/polyamide‐6 (PA‐6) blends with different melt‐shear‐viscosity ratios (VRs), prepared by combining a single‐screw extruder with a convergent die was studied. Two different screw geometries, metering and mixing screws, and three screw speeds, 20, 40 and 60 rpm,…
The distance dependence of the diffusion coefficient (DDDC) of a globular protein (cytochrome c) in aqueous hyaluronan (HA) solution, which is a model system for extracellular matrices (ECMs), was measured by a combination of three kinds of spectroscopic measurements of diffusion coefficients, the time and space sampl…
Abstract Modification of chitin by grafting with itaconic acid (IA) was carried out using potassium persulfate as redox initiator. In complimentary experiments, grafting was performed using γ‐radiation. Grafting was confirmed by FTIR spectroscopy. The effect of monomer concentration, initiator concentration and copoly…
Density functional theory was employed to investigate the chemical activity of metal carbide nanoparticles. The present calculations indicate that M(8)C(12) (M=Ti, V, Mo) nanoparticles exhibit a unique behavior compared to metal [M(001)] and metal carbide surfaces [M(2)C(001) and MC(001)]. It is found that the nanopar…
Abstract The surface modification of poly(vinyl chloride) (PVC) tubing by heparin was performed to increase its blood compatibility. A solution of benzalkonium heparinate was used in the treatment of two types of plasticized PVC. The modification of the PVC surface was monitored after various treatment conditions, and…
We prepared ZnO nanowires with a controlled reaction in an asymmetrical tube, the nanowire is composed with aligned ZnO QDs packing in the same crystal axis. An anomalous giant oscillator strength was observed in the absorption spectra of the nanowire sol at room temperature. This sol shows stimulated emission at the…
Abstract Thermally stable elastomeric composites were prepared via melt processing from poly(styrene‐b‐ethylene‐co‐butylene‐b‐styrene) (SEBS) and conducting polymer‐modified carbon black (CPMCB) additives. CPMCB additives represent a novel thermally stable conductive compound made via “ in ‐ situ ” deposition of polya…
Clay-containing polymeric nanocomposites (PNC) are mixtures of dispersed clay platelets in a polymeric matrix. These materials show enhancement of physical properties, such as modulus, strength, and dimensional stability, as well as a reduction of gas permeability and flammability. The performance is related to the de…
The dynamical transition between the anomalous single file diffusion of highly confined fluids and bulk normal diffusion can be described by a phenomenological model involving a particle hopping time tau(hop). We suggest a theoretical formalism that will be useful for the calculation of tau(hop) for a variety of syste…
Abstract Biodegradable hollow microfibres containing particles loaded with specific active agents can be potentially employed to produce a special kind of substrate for tissue engineering, able to function as a scaffold and at the same time to act as a drug‐releasing system. Biodegradable hollow microfibres based on p…
The radical cation of the redox active ligand 3,4-dimethyl-3',4'-bis-(diphenylphosphino)-tetrathiafulvalene (P2) has been chemically and electrochemically generated and studied by EPR spectroscopy. Consistent with DFT calculations, the observed hyperfine structure (septet due to the two methyl groups) indicates a stro…
We have examined the effect of ordered silver nanocluster substrates on the surface-enhanced Raman spectrum of rhodamine 6G (R6G). Triangular shaped silver nanocluster arrays with order on the approximately 100 mum range were prepared using nanosphere lithography. Direct comparisons of R6G surface-enhanced Raman spect…
A functionalized poly(ethylene glycol) (PEG) layer possessing a reactive aldehyde group at the free end of the tethered PEG chain was constructed by simple coating on the substrate, using the acetal-PEG/poly(DL-lactide) block copolymer, followed by the hydrolysis of the acetal end group by an acid treatment. The react…
We describe a wide-gap multichannel cylindrical deflection electron energy analyzer suitable for measuring the weak signals characteristic of electronically inelastic electron energy loss spectra. The analyzer has nearly ideal fringing field termination, and its resolution and energy dispersion were characterized as a…
Abstract Nanocomposite latex with nano‐silica of varying particle sizes was prepared via in situ polymerization and investigated by submicron particle size analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier‐transform infrared spectrometry (FTIR) and Raman spectrometry. It was…
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A semirigid conjugated polyaniline (PANI) was complexed with a ω-methoxy poly(ethylene oxide) phosphate (PEOPA) through ionic bonding to yield a supramolecular hairy rod polymer comprised of an ionic PANI backbone and nonionic PEO side chains. The strong backbone−side chain repulsion resulted in a microphase-separated…