Materials Literature
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Abstract The interactions of methyl esters, methyl ketones and aldehyde compounds with polypropylene (PP) film were investigated. PP film, placed on a glass vial, was immersed in aqueous solution containing a model flavour compound. After a determined time at 45°C, the PP film was analysed by Fourier transform infrare…
Abstract The reaction of addition of ethylene glycol to diisocyanates was studied with the B3LYP method to gain an insight into the mechanism of polyurethane synthesis. It was found that the functional basis set should contain at least one diffusion function for the simulation in order to properly describe thermo‐chem…
Mesoporous gold sponge may be prepared by the removal of aluminium from AuAl2 by an alkaline leach. The resulting material has nanoscale pores and channels, with a high specific surface area that can be exploited in electrochemical applications. For example, the material may serve as the basis of a more sensitive capa…
The effects of nitric acid treatment and subsequent heat treatment on the hydrogen adsorption properties of single-walled carbon nanotube (SWCNT) samples were investigated. The hydrogen adsorption and desorption isotherms of SWCNTs treated with nitric acid alone and SWCNTs treated with nitric acid and then heated were…
X-ray photoelectron spectroscopy at ambient conditions of pressure (up to 1.5 Torr) and temperature (265 K < T < 800 K) was used to study the adsorption of water on rutile TiO{sub 2}(110) under conditions of thermodynamic equilibrium. It was found that OH groups in bridging positions, normally present in small amounts…
We use the calculus of variations to give a general theory for finding optimal square and hexagonal phase gratings for doing beam splitting.
The authors use first-principles pseudopotential-based density functional theory calculations of phonon dispersions to determine the size dependence of thermal properties of armchair single wall carbon nanotubes (SWCNTs), such as their negative thermal expansion and specific heat. While the specific heat is found to d…
Abstract The synthesis, layer‐by‐layer deposition, and electro‐copolymerization of precursor polyelectrolyte multilayer ultrathin films with thiophene and carbazole electroactive groups are described. The interest is in observing an electrochemical cross‐linking approach towards a highly ordered ultrathin film that co…
Metallic nanoparticles show a rich optical behaviour because of their strong light absorption and scattering, wide spectral tunability, and interesting optical near-field effects. Research into optical effects of metallic nanoparticles, a field with a long tradition, has been developing rapidly in recent years as a re…
Addition of a small percent of clay to polymers improves their stiffness, strength, dimensional stability, and thermal, optical, and barrier properties. Improvements are often attributed to the availability of large numbers of clay nanolayers with tremendous interfacial area. Despite the positive effects from the addi…
Abstract Paper made of groundwood was surface treated by atmospheric plasma of the diffuse coplanar surface barrier discharge (DCSBD) type in air and in nitrogen. Changes in surface composition and chemical bonding of the constituent elements were studied by X-ray photoelectron spectroscopy (XPS), and alterations in w…
Abstract The synthesis of ethene/propene macromers with a high amount of sterically unhindered vinyl groups is described. These macromers are incorporated as long‐chain branches into polyethylene (PE). The remaining low molecular fractions were removed by Soxhlet extraction. Up to 60 wt.‐% macromer was included, which…
Conjugated conducting polymers and carbon nanotubes, both of which possess a conjugated structure of alternating carbon–carbon single and double bonds for the delocalization of p-electrons, are two important classes of electrochemical sensing materials. The combination of carbon nanotubes with conducting polymers or o…
A solution based laser direct write technique for patterning of glass substrates with silver nanoparticles is presented. Photoreduction of an AgNO3 solution, by nanosecond UV laser pulses, produces a source solution of silver particles. A glass substrate is then inserted into this solution and the laser is scanned ove…
The solidification contraction and feeding ability of Yb partially filled CoSb3 skutterudite alloys were studied in this letter. It is found that the pore formation was mainly due to the large solidification contraction during the L+CoSb→CoSb2 peritectic phase transition and the primary dendrite networks. Homogeneous…
The authors demonstrate that the cubic phase of quasibinary GeTe–Sb2Te3 alloys (GST), the material of choice in phase-change optical recording (such as digital versatile disk-random access memory) can be rendered amorphous by the application of hydrostatic pressure. The amorphization pressure depends on the GST compos…
The authors study the effect of interfacial space charge in ferroelectric multilayers through a thermodynamic formalism. Using an electrostatic approach that takes into account the presence of trapped charges between the layers, the authors show that considerable modification in electrical properties can be exhibited,…
The authors have fabricated ideally ordered alumina nanohole patterned disk media via anodic oxidation and nanoimprint lithography with a thermoplastic resist. The ordered arrays of alumina nanoholes with 100nm pitch, filled with Co by electrodeposition, were created over a macroscopically large area on a hard-disk su…
The authors report the integration of multiferroic BiFeO3 films with the semiconductor GaN using liquid-delivery metal-organic chemical-vapor deposition. Epitaxial BiFeO3 films were deposited via interface control using SrTiO3 buffer/template layers. The growth orientation relationship was found to be (111)[11¯0]BiFeO…
Hydrothermally grown bulk ZnO (Tokyo Denpa) was investigated using junction-capacitance spectroscopy on silver oxide Schottky contacts (barrier height of 1.20eV, ideality factor of 1.04). Two main shallow defects, T1 and T2, with thermal activation energies of 13 and 52meV, respectively, were identified. Two closely l…