Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Pt-Ti alloy films were studied for use as a lower electrode of the ferroelectric lead zirconate titanate (PZT) thin film capacitor. Pt-Ti alloy films with different Ti/Pt atomic ratios were first prepared by rf sputtering. Subsequently, PZT thin films were deposited also by rf magnetron sputtering on the Pt-Ti alloy m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEQCM studies of film growth, redox cycling, and charge trapping of n-doped and p-doped poly(thiophene)Ricardo Borjas and Daniel A. ButtryCite this: Chem. Mater. 1991, 3, 5, 872–878Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Publish…
A Gay-Berne fluid of prolate molecules with length-to-breadth ratio 3 is studied using molecular dynamics simulations. This fluid exhibits vapor, isotropic liquid, nematic, and smectic-B mesophases. For the bulk fluid we report new results along isochores that further delineate the smectic and nematic regions of the p…
Ein lipophiles Inneres und eine hydrophile Oberfläche charakterisieren Ammonium‐[8 2 · 3]‐micellanoate, bei denen es sich um Kaskadenpolymere handelt, die nur sp 3 ‐C‐Atome und CH 2 ‐Gruppen im Innern enthalten und CO ‐Gruppen an der Oberfläche. Die Micelleneigenschaften wurden durch Absorptions‐ und Fluoreszenzspektr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSize and shape characteristics of inorganic molecular ions and their relevance to crystallization problemsP. Michael D. Mingos and Andrew L. RohlCite this: Inorg. Chem. 1991, 30, 19, 3769–3771Publication Date (Print):September 18, 1991Publication History Published online1 Ma…
A cDNA construct (approximately 1 kb) of human BM-40 in a plasmid with the cytomegalovirus promoter and enhancer was used to produce several stable clones by transfecting two human cell lines (293, HT 1080). These clones showed a high expression of exogenous 1-kb BM-40 mRNA and no or only little endogenous 2.2-kb mRNA…
Monodisperse, spherical alumina powders were prepared by the controlled hydrolysis of aluminum alkoxide in a dilute solution consisting of octanoi and acetonitrile. The reagent concentration influenced the particle size, size distribution, morphology, and state of agglomeration. The addition of acetonitrile and octano…
The classical Maier-Saupe theory of spatially uniform nernatics is here extended to the case of distorted configurations. Under the assumption that the molecules are rodlike, the mean field potential is here defined as an average over a suitable neighborhood of the test molecule. The energy density thereby calculated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic disproportionation of hydrogen peroxide by manganese complex [Mn(IV)(.mu.2-O)(SALPN)]2Erlund J. Larson and Vincent L. PecoraroCite this: J. Am. Chem. Soc. 1991, 113, 20, 7809–7810Publication Date (Print):September 1, 1991Publication History Published online1 May 20…
The structure and function of NAD(H)-glutamate dehydrogenase in plants was studied by using grapevine (Vitis vinifera L. cv Sultanina) callus grown under different nitrogen sources. The enzyme consists of two subunit-polypeptides, alpha and beta, with similar antigenic properties but with different molecular mass and…
Dispersed ceramic slurries with high concentrations of indifferent electrolyte have been shown to effectively eliminate mass segregation effects in composite materials. Furthermore, high packing efficiencies have been achieved with these systems. It has been suggested that the addition of high concentrations of indiff…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of poly(.beta.-hydroxyalkanoates) obtained from Pseudomonas oleovorans grown with mixtures of 5-phenylvaleric acid and n-alkanoic acidsY. B. Kim, R. W. Lenz, and R. C. FullerCite this: Macromolecules 1991, 24, 19, 5256–5260Publication Date (P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLewis acidic catalysts for olefin epoxidation by iodosylbenzeneYihui Yang, Francois Diederich, and Joan Selverstone ValentineCite this: J. Am. Chem. Soc. 1991, 113, 19, 7195–7205Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published…
We have measured the specific heat (${\mathit{C}}_{\mathit{p}}$) of cyclohexane at 120T300 K when cyclohexane was physically restricted in porous Spherosil (silica) samples of pore radii 4, 7.5, 15, 30, and 62.5 nm. The behaviors of the monoclinic-to-cubic structural transition and of the melting transition of cyclohe…
Reasonable and significant structural differences between potassium silicate glass and sodium silicate glass can be revealed by molecular dynamics computer simulations.The differences in their immiscibility behavior reflect these structural differences. The simulation results are consistent with the experimental obser…
The role of protein residues in activating the substrate in the reaction catalyzed by the flavoprotein p-hydroxybenzoate hydroxylase was studied. X-ray crystallography (Schreuder, H. A., Prick, P.A.J., Wieringa, R.K., Vriend, G., Wilson, K.S., Hol, W.G. J., and Drenth, J. (1989) J. Mol. Biol. 208, 679-696) indicates t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimulations of buckminsterfullerene (C60) collisions with a hydrogen-terminated diamond {111} surfaceR. C. Mowrey, D. W. Brenner, B. I. Dunlap, J. W. Mintmire, and C. T. WhiteCite this: J. Phys. Chem. 1991, 95, 19, 7138–7142Publication Date (Print):September 1, 1991Publicati…
A dilute dispersion containing drops of one fluid dispersed in a second, immiscible fluid is considered. The drops are sufficiently small that inertia is negligible and that they remain spherical. Two drops of different size are in relative motion due to either Brownian diffusion or gravitational sedimentation. When t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"Inverse" organic-inorganic composite materials. 2. Free-radical routes into nonshrinking sol-gel compositesBruce M. Novak and Caroline DaviesCite this: Macromolecules 1991, 24, 19, 5481–5483Publication Date (Print):September 1, 1991Publication History Published online1 May…
The effect of impurity coimplantation in MeV erbium-implanted silicon is studied. A significant increase in the intensity of the 1.54-μm Er3+ emission was observed for different coimplants. This study shows that the Er3+ emission is observed if erbium can form an impurity complex in silicon. The influence of these imp…