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。
Abstract Scanning electron microscopy (SEM) has shown various significant improvements since it first became available in 1965. These improvements include enhanced resolution, dependability, ease of operation, and reduction in size and cost. This article provides a detailed account of the instrumentation and principle…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective removal of electron-accepting p-toluene- and naphthalenesulfonyl protecting groups for amino function via photoinduced donor acceptor ion pairs with electron-donating aromaticsTatsuo. Hamada, Atsushi. Nishida, and Osamu. YonemitsuCite this: J. Am. Chem. Soc. 1986,…
A new selective deposition technology using electron beam induced surface reaction has been demonstrated. Electron beam induced W and Cr patterns were deposited by using WF6, WCl6, and Cr(C6H6)2 as sources, respectively. W and Cr depositions were confirmed by analysis using Auger electron spectroscopy (AES) and x-ray…
Defect parameters are calculated for a wide range of defects in UO2. In addition to internal energies, entropies of formation have been calculated for some defects. Enthalpies are obtained for comparison with experimental data, where available. Defect processes studied include intrinsic defects, cation substitution, i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics, photochemistry, kinetics, and mechanism of the photochromism of 6'-nitroindolinospiropyranChristian Lenoble and Ralph S. BeckerCite this: J. Phys. Chem. 1986, 90, 1, 62–65Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Publ…
A novel, soluble copper phthalocyanine containing four benzo-15-crown-5 moieties was synthesized and characterized by elemental analysis, i.r. and u.v. spectroscopy, and its alkali cation-complexing capability and selectivity studied.
Abstract The thermal expansion behavior for various aromatic polymides was investigated. Usally polymers, including polyimides, have high thermal expansion coefficients (3–6 × 10 −5 K −1 ), compared with metals and ceramics. However, there are some polyimides which have very low thermal expansion coefficients below 1…
We present a theory of epitaxial growth appropriate to overlayer materials that can adopt a bulk metastable crystal structure with a lattice constant significantly different from that of the stable ground state structure, as is common for metal epitaxy. This requires a generalization of the traditional Frank and van d…
Proton-exchanged K4Nb6O17 showed high activity for H2 evolution from aqueous methanol solution without any assistance from other materials such as noble metals.
A Van der Waals fluid, climbing from a reservoir along a vertical wall, should display a remarkable cascade of events : i) A macroscopic meniscus is set up in a short time t1 and reaches the classical altitude hc∼ 1 mm. ii) A dynamic precursor film appears at a time t2 ∼ 10-2 s. The tip of the « tongue» advances fast…
Moving dislocations in II–VI semiconductors carry a large electric charge. This charge is not in thermal equilibrium, but is due to the sweeping up of electrons from point defects. Its movement produces a dislocation current during plastic deformation, and conversely, the application of an external field changes the f…
The effect of small uniaxial stresses on the sintering of CdO powder compacts was studied using a loading dilatometer. Compacts of two different green densities were sintered at 1123 K and subjected to stresses between 0 and 0.25 MPa. Densification and creep occur simultaneously, and the effects of these two processes…
Abstract
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnhanced photoredox chemistry in quantized semiconductor colloidsJ. M. Nedeljkovic, M. T. Nenadovic, O. I. Micic, and A. J. NozikCite this: J. Phys. Chem. 1986, 90, 1, 12–13Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Published inissu…
Some species of extremely halophilic archaebacteria, Halobacteriaceae, have been shown to accumulate large amounts of poly (beta-hydroxybutyrate) under conditions of nitrogen limitation and abundant carbon source. The production of poly (beta-hydroxybutyrate), at least in large quantities, was restricted to two carboh…
Crystal structure, composition and morphology of the precipitate in an aged Ti-51 at%Ni shape memory alloy have been examined by means of high voltage and high resolution analytical electron microscopy. As a result, the following have been clarified. The precipitate possesses a rhombohedral structure with a=0.670 nm a…
The biologic response to injectable, glutaraldehyde cross-linked, fibrillar collagen implants in the rat subcutaneous model was shown to be a function of the concentration of glutaraldehyde used for cross-linking. The collagen was prepared from bovine hide by pepsin solubilization and reconstituted as a fibrillar susp…
Abstract
Binuclear copper(II) complexes, [Cu2(L1)(O2CMe)]·H2O (1), [Cu2(L5)(O2CMe)]·MeOH (2), [Cu2(L5)(O2CPh)]·H2O (3), [Cu2(L3)(O2CMe)](4), [Cu2(L2)(O2CMe)](5), and [Cu2(L4)(OMe)(MeOH)](6) were prepared, where the ligands H3Ln are 1 : 2 Schiff bases derived from 1,3-diaminopropan-2-ol and the carbonyl compounds acetylacetone…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of arm number and arm molecular weight on the solid-state morphology of poly(styrene-isoprene) star block copolymersDavid B. Alward, David J. Kinning, Edward L. Thomas, and Lewis J. FettersCite this: Macromolecules 1986, 19, 1, 215–224Publication Date (Print):January…