Materials Literature
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Dry etching of Cu film was achieved via oxidation process using oxidizing agents such as O2 plasma, O3, or O3 plasma, followed by the removal process of the copper oxides (CuOx) by reaction with hexafluoroacetylacetone [H(hfac)] to form volatile copper compound, [bis-hexafluoroacetylacetonate: Cu(hfac)2] and H2O. The…
Vanadium dioxide films have been deposited on silicon substrates by reactive RF cathodic sputtering from and targets. The optical measurements show a good contrast at the semiconductor-metal transition, but exhibit two kinds of hysteresis cycle: a narrow and symmetrical one, and a wider and asymmetrical one. We have m…
The adsorption isotherms for the octylphenol ethoxylate, TX100, onto a range of bentonites and a saponite have been determined and the resulting thermal stability of composites has been studied. In general TX100 exhibited a high affinity for the different clay surfaces although the maximum amount adsorbed varied with…
Abstract The nutrient saturated growth and the competition between Limnothrix redekei and some spring diatoms for phosphate were studied in semi‐continuous cultures at 10°C with a 6/18 h light/dark cycle and at 15 °C with a 12/12 light/dark cycle. Under these conditions in unialgal cultures, the maximum specific growt…
The temperature dependence of Vickers hardness (H) of TeO2-Based glasses such as 15Na2O⋅15ZnO⋅70TeO2 as host glasses for rare-earth doped optical amplifier was measured from room temperature to the glass transition region. The following features were found; (1) crack formation under the indenter easily occurs, the Vic…
ents on the Properties of Steel . . . . . . . . . . . . . . . . 6-19 ment of Iron and Steel . . . . . . . . . . . . . . . . . . . . . . . 6-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21 FRANK E. GOODWIN Vice President, Materials Science, ILZRO, Inc. DON GRAHAM Manager, Tur…
The crystal and molecular structure of 1,4,7,10-tetrakis(N-benzylcarbamoylmethyl)-1,4,7,10-tetraazacyclododecane, L1, revealed an S2-symmetric molecule. One pair of pendant arms is involved in intramolecular hydrogen bonding while the other interacts with two other ligand molecules through strong intermolecular hydrog…
Using graph theory, it is shown that the introduction of 70 atom % of into a ‐Cr‐O‐Cr‐ oxide network serves to disjoin the network, or conversely, introduction of 30% atomic concentration of serves to provide a connected ‐Cr‐O‐Cr‐ network. The results of surface analysis show that this concentration of 30 atom % in th…
J. R. Lu, Annu. Rep. Prog. Chem., Sect. C: Phys. Chem., 1999, 95, 3 DOI: 10.1039/PC095003
This article provides an overview of the development and application of surface-enhanced Raman scattering (SERS) for the detection of vapors of organic chemicals with the use of personal dosimetry. The approach used with this personal dosimeter requires no sample desorption or wet-chemical extraction procedure. The do…
The dihydroporphyrazinediol 8, which was prepared by Linstead macrocyclisation of 2,5-diiminopyrrolidine with 3,4-bis(4-tert-butylphenyl)pyrroline-2,5-diimine, followed by TFA demetallation and OsO4 tetroxide mediated dihydroxylation, underwent reaction with Ni(OAc)2 at 100 °C in the presence of air to give the novel…
The reaction Fe+NO2→FeO+NO was studied by the pulsed two-photon dissociation at 248 nm of ferrocene vapour to produce Fe atoms in an excess of NO2 and He bath gas. Atomic Fe was then monitored by time-resolved laser-induced fluorescence spectroscopy at 248.3 nm [Fe(x5F05–a5D4)], yielding k(192<T/K<471)=(4.84-1.10+1.24…
To investigate the effect of the hydrophilic and hydrophobic microdomain structure on blood compatibility, a series of interpenetrating polymer networks (IPNs) composed of hydrophilic polyurethane (PU) and hydrophobic polystyrene (PS) was prepared. One series was prepared with varying cross-link densities of each netw…
Spontaneous removal of monocarboxylic (formic, acetic, propionic or butyric) acids accompanying dehydration of the corresponding chitosan salts was observed from X-ray fiber diffraction diagrams obtained during the storage of these salts for a given period of time. The first three salts were prepared by immersing a te…
The biodegradable polymers of poly(DL-lactide-co-glycolide) (PLGA) and poly(ethyleneglycol) (PEG) have come into use in the last few years for the control of the release of drugs. The incorporation of units of PEG produce an increased in vivo half life of the microparticles. The methoxylation of the PEG allows a contr…
The self-consistent full-potential LMTO method was used to study the electronic properties of the new hexagonal phases Ti3AlC2 and Ti3AlN2, and their chemical stability was compared with the stability of the isostructural compound Ti3SiC2 on the basis of cohesive energy calculations.
Poly-quasicrystalline samples of an icosahedral Al-Cu-Fe alloy have been deformed in compression tests under constant-strain-rate conditions at temperatures ranging from room temperature up to 1020 K (T m ≈ 1150 K, where T m is the melting temperature). The activation volumes, which were measured by performing load re…
Abstract Removal of SO 2 from the emissions of coal‐fired boilers produces by‐products that often consist of CaSO 4 , residual alkalinity, and coalash. These by‐products could be beneficial to acidic soils because of their alkalinity and the ability of gypsum (CaSO 4 ·2H 2 O) to reduce AI toxicity in acidic subsoils.…
1.1. Homogenization and Second Grade Media. The aim of homogenization methods is to replace a heterogenous material by a homogenous equivalent one endowed with effective properties. The now well-established results of classical homogenization theory [15] are generally based on the assumption of constant mean fields [1…
The structure of MO-TeO2 (M=Mg, Zn, Sr, Ba and Pb) glasses has been studied by means of 125Te static NMR technique. The fraction of TeO4 trigonal bipyramid (tbp), N4 decreased and that of TeO3 trigonal pyramid (tp), N3 increased almost linearly up to 33.3mol% MO and rapidly in the range of 33.3 to 40mol% MO, with incr…