Materials Literature
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Prediction of yarn properties from fibre properties and process parameters is a well-researched topic. For a number of years, mechanistic and statistical models have primarily been used to tackle the problem. Over the last ten years, neural networks have been used in increasing numbers for this purpose. However, a com…
Voltage modulated scanning force microscopy in contact mode or piezoresponse scanning force microscopy is now turning into an established technique for imaging ferroelectric domains in ferroelectric thin films. The quantities measured, however, are the amplitude and phase of a locally induced piezoelectric strain, and…
Preface Part 1. General Papers Surface effects on intrinsic thin-film stresses, R. C. Cammarata Adhesion properties of functionally gradient diamond-like carbon nanocomposite films, R. J. Narayan Adhesion improvement of magnetron-sputtered amorphous carbon coating on cemented carbide, S. Zhang and X. L. Bui Characteri…
A novel double-layered hybrid organic–inorganic material [Zn2(tp)(4,4′-bpy)V2O6] has been prepared hydrothermally and X-ray crystallographic analysis shows that it has a three-dimensional network constructed from polycatenated tetravanadate-pillared double-layered sheets.
High-quality undoped ZnO epitaxial films with mobilities as high as 120 cm 2 V -1 s -1 and carrier concentrations as low as 7.6 ×10 16 cm -3 have been grown on (1120) a -sapphire substrates using low-temperature buffer layers, a slow substrate cooling process and a modified oxygen radical cell. Pole figure measurement…
3D organization of magnetic nanoparticles has until now only been observed on a small scale. In this communication, the formation of large-scale 3D superlattices of cobalt nanocrystals (see Figure) is reported, in which the degree of organization is shown to be highly dependent on the strength of magnetic field applie…
A composite made from boron-doped carbon nanotubes and polystyrene exhibits relatively low electrical resistance and minor variations in conduction when mechanically loaded. Carbon nanotubes form a network within the plastic film, thereby establishing electrical conduction uniformly throughout the composite. Individua…
Experimental programs on fuel behavior during simulated reactivity-initiated-accident (RIA) conditions at the Nuclear Safety Research Reactor (NSRR) in Japan and the CABRI test reactor in France appear to indicate that cladding failures may occur at enthalpy values lower than would be expected. Results from two experi…
We describe laser and mass spectroscopic methods, and related modelling studies, that have been used to unravel details of the gas phase chemistry involved in diamond chemical vapour deposition (CVD) using both H/C (i.e. hydrocarbon/H2) and H/C/O (e.g. CO2/CH4) gas mixtures, and comment on the relative advantages and…
Two lanthanide coordination polymers {Tb(O2CPh)3(CH3OH)2(H2O)}n1 and {Tb2(O2CPh)6(4,4′-bipy)}n2 have been identified and isolated from a methanol solution A of Tb(OAc)3·4H2O, benzoic acid and 4,4′-bipyridine in a 1∶3∶2 ratio. Their structures have been determined by single-crystal X-ray diffraction analyses, which rev…
The dry etching characteristics of ZnO using an inductively couple plasma (ICP) have been investigated, for the first time, as functions of plasma chemistry, radio frequency (rf) table power, and ICP power. The etchant gases resulted in the highest etch rate of ZnO, suggesting that the etching of Zn in ZnO largely inv…
The processing of recycled poly(ethylene terephthalate) (PET) involves thermal and hydrolitic degradation of a polymer, which reduces the molecular weight, the intrinsic viscosity, and the mechanical properties of recycled materials. Degradative effects can be limited by using chain extenders. Preliminary tests show t…
Carbon-doped low k thin films were prepared by radio frequency plasma-enhanced chemical vapor deposition at 400°C from polymerization of tetramethylsilane (4MS) and copolymerization of tetramethylsilane and silane precursor, with nitrous oxide as the oxidant gas. Copolymer thin films from 4MS and precursor show much h…
A molybdenum oxide with high aspect ratio has been synthesized by a template-directed process. The reaction of molybdic acid and primary amines with long alkyl chains, followed by hydrothermal treatment, led to a lamellar molybdenum oxide–amine composite. The subsequent removal of the intercalated amines with nitric a…
Superplasticity was investigated in nanocrystalline Al alloy 1420 to evaluate the scalability of conventional constitutive relationships in the nanocrystalline range. The parametric dependences of superplastic flow were obtained by constant-strain-rate tensile tests in the temperature range 200–300°C and a strain rate…
Dendrimers based on polyhedral oligomeric silsesquioxanes (POSS) cores with 16 PPh2 arms give much higher linear selectivities (14∶1) than their small molecule analogues (3–4∶1) in the hydroformylation of oct-1-ene.
The database reported here is derived using the Combinatorial Extension (CE) algorithm which compares pairs of protein polypeptide chains and provides a list of structurally similar proteins along with their structure alignments. Using CE, structure-structure alignments can provide insights into biological function. W…
A simple one-pot synthesis of size and shape controlled ZnTe nanocrystals using a monomeric molecular precursor, [Zn(TePh)2][TMEDA], has been studied by varying the growth temperature or the templating surfactants.
The polycrystalline La1−xCexMnO3 manganites do not exist in single phase in bulk under the preparation conditions so far employed, but their polycrystalline and epitaxial films deposited by the pulsed laser deposition (PLD) technique form readily in single phase. The cerium oxide (CeO2) remains partially unreacted whe…
We present evidence in favor of the possibility of treating an out-of-equilibrium supercooled simple liquid as a system in quasiequilibrium. Two different temperatures, one controlled by the external bath and one internally selected by the system, characterize the quasiequilibrium state. The value of the internal temp…