Materials Literature
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Abstract The selective ion transport of aqueous salt solutions including mono‐, di‐, trivalent cations across both doped and undoped polyaniline (PAni) membranes was described. PAni‐based asymmetric membranes were prepared by the phase inversion method from the casting solution containing N ‐methyl pyrrolidone. It was…
We investigate size effects in nanocrystalline nickel nanowires using molecular dynamics and an EAM potential. Both compressive and tensile deformation tests were performed for nanowires with radii ranging from 5 to 18 nm and a grain size of 10 nm. The wires contained up to four million atoms and were tested using a s…
Abstract Polycaprolactone (PCL) grafting on vinyl alcohol‐ co ‐vinyl acetate) (PVA‐Ac), was investigated in the melt at high temperature (170°C), below the PVA‐Ac melting point, by ring opening polymerization of ϵ‐caprolactone initiated by metal alkoxyde sites present in PVA‐Ac: no additional initiator was used. The o…
Measurements are reported of breakdown voltage values and pre-breakdown voltage–current characteristics as a function of air density in a simple rod–plane electrode gap 50 mm in length. Pressure has been reduced and temperature raised from normal atmospheric values, independently of each other, to give the relative ai…
Part 1 Measurements and reference electrodes: Current state-of-the-art in reference electrode technology for use in high subcritical and super critical aqueous systems LIRES: A European sponsored research project to develop light water reactor reference electrodes In-plant corrosion potential measurements in light wat…
Novel shape memory behaviour was discovered recently in single-crystalline fcc nanowires of Cu, Ni and Au with lateral dimensions below 5 nm. Under proper thermomechanical conditions, these wires can recover elongations up to 50%. This phenomenon only exists at the nanoscale and is associated with reversible lattice r…
Abstract A series of poly(ester‐urethane‐urea) acrylates were synthesized using poly(ethylene adipate) diol (PEA), 4,4′‐diphenyl methane diisocyanate (MDI), different diamines and acrylic acid. On the basis of IR, stress–strain, thermogravimetric, and differential scanning calorimetry measurements of their cured mater…
This paper reports on ZnO nanowires arrays synthesized using Sn as a catalyst. The Sn particles were produced from the reduction of SnO2 powders via a vapour-solid growth process. Control of growth conditions led to the formation of ZnO nanowire arrays, radial nanowire ‘flowers’ and uniaxial fuzzy nanowires. ZnO nanow…
Wenn aus Feinden Freunde werden: Die hierarchische Selbstorganisation – durch konzertierte Wirkung verschiedener Kräfte auf ihren charakteristischen Längenskalen – ermöglicht die Bildung von funktionellen supramolekularen Architekturen mit hohem Ordnungsgrad sowohl auf der nano- als auch auf der makroskopischen Ebene.…
Abstract Tensile and impact properties of Neem bark flour (BF) containing high density polyethylene (HDPE) composites were studied at 0–0.26 volume fraction of filler. Tensile modulus and strength and breaking elongation decreased with increase in BF concentration. The decrease in tensile modulus and strength was attr…
Abstract Aqueous polyurethane (APU) dispersions having a solid content of 50% were synthesized using dimethyol propionic acid (DMPA) as the stabilizing moiety. The principal diols used were poly‐1,4‐butylene adipate glycol (PBA). The diisocyanates used in this study were a 30:70 blend of hexamethylene diisocyanate (HD…
The adsorption dynamics of n -/isobutane on “closed”-end (as-prepared, c-CNTs) and open-end (vacuum-annealed) carbon nanotubes (o-CNTs) have been studied by molecular beam scattering adsorption probability measurements. Thermal desorption spectroscopy (TDS) and scanning electron microscopy have been used to characteri…
Abstract Castor oil‐based polyurethane (PU)–polyester nonwoven fabric composites were fabricated by impregnating the polyester nonwoven fabric in a composition containing castor oil and diisocyanate. The effects of different diisocyanates such as toluene‐2,4‐diisocyanate (TDI) and hexamethylene diisocyanate (HMDI) on…
Abstract Hybridization of Banana fibers with glass fibers has been found to reduce the water absorption behavior of the composites in an earlier work by us. Banana fibers were hybridized with glass and different layering patterns were followed in the preparation of the composites. The effect of the various layering pa…
This paper demonstrates the importance of the structural changeover in controlling the physical-chemical properties of hexacyanometalate-like materials (Prussian Blue). A meticulous in situ study of compositional variations using electroacoustic impedance techniques associated to electrogravimetric techniques in hexac…
Hydrated vanadium pentoxide (V 2 O 5 · n H 2 O) nanotube arrays with outer diameters of 200 nm and lengths of more than 5 μm have been synthesized via template-based physical wetting of V 2 O 5 sols. The V 2 O 5 · n H 2 O nanotube arrays were characterized by scanning electron microscopy, X-ray diffraction, and high-r…
Relaxometry and solution thermodynamic measurements show that Gd(H(2,2)-1,2-HOPO) is a good candidate as a contrast agent for magnetic resonance imaging (MRI-CA). Acidic, octadentate H(2,2)-1,2-HOPO forms a very stable Gd(III) complex [pGd=21.2(2)]. The coordination sphere at the Gd(III) center is completed by one wat…
A comparative study of ${\mathrm{La}}_{x}{\mathrm{Bi}}_{1\ensuremath{-}x}\mathrm{Mn}{\mathrm{O}}_{3}$ thin films grown on $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ substrates is reported. It is shown that these films grow epitaxially in a narrow pressure-temperature range. A detailed structural and compositional charac…
Acoustic streaming is an important phenomenon observed in sonochemical reactors controlling the physical effects due to the cavitation. Not many efforts are observed, however, in exact quantification of the generated liquid circulation currents, experimentally or theoretically. The present work has been directed at qu…
Sensitive and specific: By using surface-enhanced Raman scattering (SERS) microspectroscopy, solid-phase-bound compounds can be detected directly and marker-free in a few seconds on a single polystyrene bead. No significant contributions of the matrix are observed, as demonstrated by reference Raman spectra.