Materials Literature
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The development of stresses in the scale during the high-temperature oxidation of metals can have important consequences for the long-term protection of components in service, particularly if this leads to scale failure, allowing access of the environment to the metal surface. Such stresses may result from externally…
films have been prepared by radio frequency (RF) magnetron sputtering at various total pressure, RF power, and substrate temperatures. Microstructure and crystallographic orientation were characterized by x‐ray diffraction. Surface morphologies were observed by scanning electron microscope. In addition, cathodolumines…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChirochromism-Photochromism by Epimerization: Search for a Liquid Crystal PhototriggerMingbao Zhang and Gary B. SchusterCite this: J. Am. Chem. Soc. 1994, 116, 11, 4852–4857Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1…
Abstract The mechanism of photoinduced structural transformations in amorphous As 2 S 3 is studied with the differential IR Fourier spectroscopy technique in the 400 to 100 cm −1 region. It is established that the irreversible photostructural effect observed in freshly evaporated thin films is accompanied by switching…
The phase compositions of undoped and europium‐doped zirconia samples, obtained by precipitation and thermal treatment from 350° to 1000°C, have been investigated by powder X‐ray diffractometry, infrared spectroscopy, and cathodoluminescence spectroscopy. The low‐temperature stabilization of tetragonal zirconia is mai…
The alignment of nematic liquid crystals on micro-groove patterns was studied. It has been found that the order of the alignments is determined by the edge shape, spacing, and line pitch of the micro-groove patterns. On coarse patterns, with pitches greater than 2 μm, striped patterns of the liquid crystal alignment w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSol-Gel Derived TiO2 Microemulsion Gels and CoatingsDespina Papoutsi, Panagiotis Lianos, Panagiotis Yianoulis, and Petros KoutsoukosCite this: Langmuir 1994, 10, 6, 1684–1689Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue…
Extended Hückel molecular orbital (EHMO) calculations were performed on some substituted aliphatic amines and some substituted pyridine derivatives that are used as corrosion inhibitors in sour media. Correlations of corrosion rates with the charge on the nitrogen atom (Zn), energy of the highest occupied molecular or…
The deformation behavior of a single polymer chain subjected to an external force was studied by computer simulations. Both random walks and self-avoiding walks were investigated. The simulations were performed in two and three dimensions using the bond fluctuation model. The projection of the end-to-end vector in for…
A detailed investigation of the superplastic deformation of two grades of the Pb-62 Sn eutectic (where the compositions here and subsequently are in weight per cent) was conducted under identical experimental conditions of grain size (about 8 μm), temperature (390–420 K) and stress (0·1–10 MPa). The first grade (grade…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSlow Dielectric Relaxation of Entangled Linear cis-Polyisoprenes with Asymmetrically Inverted Dipoles. 2. Behavior in a Short MatrixHiroshi Watanabe, Osamu Urakawa, and Tadao KotakaCite this: Macromolecules 1994, 27, 13, 3525–3536Publication Date (Print):June 1, 1994Publicat…
Abstract Stainless‐steel artefacts are used as reference masses for the calibration of balances and instruments involving force. The surfaces of these masses react with the environment, leading to changes in the chemistry of the steel surface, accretion of surface contamination layers and a dynamic absorption of moist…
Boehmite sol prepared from aluminum nitrate has been spray‐dried to obtain micrometer‐size spherical particles consisting of submicrometer crystallites. The spray‐dried powder was further washed with solvents of varying polarities such as acetone, 2‐propano1, and 2‐methyl‐2‐propanol. Particle‐size distribution, morpho…
Through the coupling between the electrical capacitance of a spherical piezoceramic shell and the mechanical stiffness of a liquid contained therein, the frequency-dependent adiabatic bulk modulus ${\mathit{K}}_{\mathit{s}}$(\ensuremath{\omega}) of the liquid can be derived. Using this method, ${\mathit{K}}_{\mathit{s…
Photochemical excitation of (nBu4N)4W10O32 in the presence of cyclohexylamine leads to the monoelectronic reduction of the decatungstate (phi = 8 X 10(-2)) with the formation of cyclohexylamine radical species which can be detected by ESR spin-trapping investigations. Using this technique we could also reveal the pres…
The corrosion behavior of phosphatized zinc (Zn)-electroplated steel coated with epoxy films of different thicknesses was studied using electrochemical impedance spectroscopy (EIS), the breakpoint frequency method, potentiodynamic measurements, and the faradaic distortion method. The trends with time of the coatings’…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the Enantioselective Dihydroxylation of Olefins by OsO4 in the Presence of Chiral BasesAchim Veldkamp and Gernot FrenkingCite this: J. Am. Chem. Soc. 1994, 116, 11, 4937–4946Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Publi…
This is the first of a set of articles on protein adsorption on low-temperature isotropic carbon (LTIC), a reputed blood compatible material. Surface-induced conformational changes of albumin, fibrinogen, and some small proteins were measured by differential scanning calorimetry (DSC) on LTIC powders and colloidal sil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInclusion Complexes and Guest-Induced Color Changes of pH-Indicator-Modified .beta.-CyclodextrinsTetsuo Kuwabara, Asao Nakamura, Akihiko Ueno, and Fujio TodaCite this: J. Phys. Chem. 1994, 98, 25, 6297–6303Publication Date (Print):June 1, 1994Publication History Published on…
We report on dc-magnetization measurements on high-quality single crystals of the organic superconductors \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$ Cu(NCS${)}_{2}$ and \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu[N(CN${)}_{2}$]Br for fields parallel and perpendicular to the conducting planes. For H perpendicular to the plane…