Materials Literature
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Abstract Electrospinning with a collector consisting of two pieces of electrically conductive substrates separated by a gap has been used to prepare uniaxially aligned PAN nanofibers. Solution of 15 wt % of PAN/DMF was used tentatively for electrospinning. The effects of width of the gap and applied voltage on degree…
Abstract The present study deals with the effects of natural fibers on thermal and mechanical properties of natural fiber polypropylene composites using dynamic mechanical analysis. Composites of polypropylene and various natural fibers including kenaf fibers, wood flour, rice hulls, and newsprint fibers were prepared…
Organization of flakes into hollow, curved architectures (see figure) by means of an “aggregation-then-growth” process is described, providing in addition a fine example of a V3+ nanostructure. The new-phased VOOH hollow “dandelions” are shown to increase very effectively the capacity of lithium-ion intercalation/dein…
Abstract Polylactide (PLA) films were prepared by the thermocompression and solvent‐casting methods, and selected properties, such as the mechanical, water‐vapor‐barrier, thermal, and thermomechanical properties, were tested. The solvent‐cast films contained 13.7% solvent, which functioned as a plasticizer, as evidenc…
We present a theoretical framework and computer simulation methodology for investigating the equilibrium structure and properties of mesostructured polymeric fluids with embedded colloids or nanoparticles. The method is based on a field-theoretic description of the fluid in which particle coordinates and chemical pote…
We have found a procedure for generating novel two-dimensional (2D) nanowebs in three-dimensional (3D) fibrous mats by optimization of various processing parameters during electrospinning. The electrospun fibres act as a support for the 'fishnet-like' nanowebs comprising interlinked one-dimensional (1D) nanowires. The…
An analytical model is presented for predicting the transport and capture of therapeutic magnetic nanoparticles in the human microvasculature. The nanoparticles, with surface bound drug molecules, are injected into the vascular system upstream from malignant tissue, and are captured at the tumor site using a local app…
The use of highly activated carbon nanofibers for the design of catalytic electrochemical biosensors is demonstrated. The direct immobilization of enzymes onto the surface of carbon nanofibers is shown to be a highly efficient method for the development of a new class of very sensitive, stable, and reproducible electr…
Polyhydroxyalkanoates are emerging as a class of biodegradable polymers for applications in tissue engineering. Members of the polyhydroxyalkanoates family encompass a wide variety of materials, from hard and brittle materials to soft and elastomeric. Over the years, efforts have been made to extend the group of polyh…
A perfectly hydrophobic surface with both advancing and receding water contact angles of 180 degrees was prepared using a facile method on a silicon wafer. Phase separation of a toluene-swollen covalently attached methylsilicone results in a nanoscale network structure that is responsible for the superhydrophobicity.…
The self-healing anticorrosion effect of layer-by-layer (LbL) assembled nanoreservoirs (polyelectrolyte-coated nanoparticles) embedded in a hybrid coating deposited onto an Al alloy is investigated (see figure). The corrosion inhibitor, benzotriazole, is entrapped in the polyelectrolyte at the LbL assembly step; its r…
Abstract 1,2‐Dimethoxyethane and Tetrahydrofuran Complexes of Rare‐Earth Metal Nitrates A series of tetrahydrofuran (thf) or 1,2‐dimethoxyethane (dme) solvates of rare‐earth metal nitrates with the composition Ln(NO 3 ) 3 (thf) 3 (Ln = Y ( 1a ), Pr ( 1d ), Sm ( 1f ), Eu ( 1g ), Gd ( 1h ), Tb ( 1i ), Dy ( 1j ), Ho ( 1k…
We measured the transmission spectra and the time-resolved differential reflectivity ΔR in Ga1−xMnxAs for x⩽0.05 for several excitation wavelengths. The sign of ΔR in Ga1−xMnxAs (x=0.015 and x=0.03) was negative for photon energy larger than band gap at room temperature. The negative component of ΔR was explained by d…
Abstract A manganese(II) complex with novel coordination mode of picolinic acid (pic) has been synthesized and characterized by elemental analysis, magnetic susceptibility, FT‐IR, thermal analysis (DTA and TG) and X‐ray diffraction techniques. The complex crystallizes in the monoclinic space group P 2 1 / c with unit…
Abstract Electronic Structures of Highly Symmetrical Compounds of f Elements. 40. Parametric Analysis of the Crystal Field Splitting Pattern of Tris(hydrotris(1‐pyrazolyl)borato)neodymium(III) The absorption spectrum of tris(hydrotris(1‐pyrazolyl)borato)neodymium(III) (NdTp 3 ) was run at room and low temperatures. Fr…
Abstract [Mn(en) 3 ][Mn 2 (SbSe 4 ) 2 (en) 4 (H 2 O)] ( 1 ) and [Mn(en) 3 ][{Mn(en) 2 (H 2 O)} 2 (μ‐SbSe 4 )] [Mn(μ‐SbSe 4 )(en) 2 ]Cl 2 ( 2 ) may be prepared by methanolothermal reaction of Mn(OOCCH 3 ) 2 · 4H 2 O with elemental Sb and Se in the presence of CsCl in a 1:1 CH 3 OH/en mixture at 190°C. The [Mn 2 (SbSe 4…
Abstract Synthesis of cis ‐ and trans ‐[Fe(CN) 2 (CN t Bu) 4 ] in a One‐Pot Procedure from Fe 2 (CO) 9 and tert. Butylisocyanide The reaction of Fe 2 (CO) 9 with tert. butyl isocyanide in the presence of 10 bar of carbon monoxide leads to the formation of the mononuclear trigonal bipyramidal compound [Fe(CO) 3 (CN t B…
Abstract Monodispersed CaF 2 and Eu 3+ :CaF 2 nanoparticles were synthesized through an original non‐aqueous route involving isopropanol nanoreactors dispersed in a polystyrene / THF solution. Transmission electron microscopy revealed a mean diameter of 15 nm with a small standard deviation of 5 nm, for both, undoped…
Self-assembled monolayer (SAM) patterns on electrodes are often utilized to guide the assembly of single-walled carbon nanotubes (SWCNTs) onto the electrodes to form desired device structures. In this case, the SWCNTs are in contact with the electrodes through the SAM which comprises molecular wires. Presumably, it is…
We demonstrate nanometer scale localization of the nonlinear optical response of single nanoparticles and aggregates and correlate this with their morphology. The essence of our approach is to create position markers on an optical and electron-transparent substrate (Si3N4 thin film) that allows optical measurements an…