Macromolecular engineering of polylactones and polylactides. 5. Synthesis and characterization of diblock copolymers based on poly-iε-caprolactone and poly(L,L or D,L)lactide by aluminum alkoxides
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Thermal degradation of poly(methyl methacrylate). 4. Random side-group scission
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal degradation of poly(methyl methacrylate). 4. Random side-group scissionLewis E. ManringCite this: Macromolecules 1991, 24, 11, 3304–3309Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/…
Surface science studies of the electronic and chemical properties of bimetallic systems
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface science studies of the electronic and chemical properties of bimetallic systemsJose A. Rodriguez and D. Wayne GoodmanCite this: J. Phys. Chem. 1991, 95, 11, 4196–4206Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1…
Premelting crystalline relaxations and phase transitions in nylon 6 and 6,6
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPremelting crystalline relaxations and phase transitions in nylon 6 and 6,6N. S. Murthy, S. A. Curran, S. M. Aharoni, and H. MinorCite this: Macromolecules 1991, 24, 11, 3215–3220Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inis…
Relationships between structural parameters and Raman frequencies for some planar and nonplanar nickel(II) porphyrins
Molecular mechanics calculations, based on a force field derived from a previously published normal coordinate analysis for NiOEP (1) and the X-ray structure of NiOEP? triclinic form, have been used to predict the structures of NiTPP (2), NiP (3), and several recently synthesized nickel porphyrins which bear alkyl or…
Ferroelectric thin films for electronic applications
This is a review paper on the history of ferroelectric thin films, current practices in their fabrication, characteristics of interest which relate to their use, and the application of these films to memory and electrooptic devices.
A molecular interpretation of the toughness of glassy polymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA molecular interpretation of the toughness of glassy polymersH. R. BrownCite this: Macromolecules 1991, 24, 10, 2752–2756Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/doi/10.1021/ma00010a01…
Dynamic light-scattering study of the glass transition in a colloidal suspension
This paper describes a light-scattering study of the glass transition in nonaqueous suspensions of sterically stabilized colloidal spheres. The observed phase behavior, fluid, crystal, and glass, is consistent with an essentially hard-sphere interaction between the particles. Metastable fluid states were obtained upon…
Nonlinear optical properties of nanometer-sized semiconductor clusters
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonlinear optical properties of nanometer-sized semiconductor clustersY. WangCite this: Acc. Chem. Res. 1991, 24, 5, 133–139Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/doi/10.1021/ar00005a…
Hyperbranched macromolecules via a novel double-stage convergent growth approach
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHyperbranched macromolecules via a novel double-stage convergent growth approachKaren L. Wooley, Craig J. Hawker, and J. M. J. FrechetCite this: J. Am. Chem. Soc. 1991, 113, 11, 4252–4261Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Publis…
Images of a microelectronic device with the X1‐SPEM, a first generation scanning photoemission microscope at the National Synchrotron Light Source
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation H. Ade, J. Kirz, S. Hulbert, E. Johnson, E. Anderson, D. Kern; Images of a microelectronic device…
Cathodoluminescence and annealing study of plasma-deposited polycrystalline diamond films
We have measured the cathodoluminescence spectra of microwave plasma-assisted chemical-vapor deposited (CVD) polycrystalline diamond films at 77 K over the spectral range of 2300–8000 Å. Annealing studies of these spectra have been carried out at 500, 800, 1000, 1200, and 1350 °C. Rich spectra are observed. Many of th…
Electrosyntheses, Spectroelectrochemical, Electrochemical, and Chronovoltabsorptometric Properties of Family of Poly (Aromatic Amines), Novel Processible Conducting Polymers: I . Poly(Benzidines)
Electrosyntheses, Spectroelectrochemical, Electrochemical, and Chronovoltabsorptometric Properties of Family of Poly (Aromatic Amines), Novel Processible Conducting Polymers: I . Poly(Benzidines), Chandrasekhar, P., Gumbs, Ronald Winston
A quantum mechanical calculation of the theoretical strength of metals
We use the local density approximation to density functional theory to re-examine the well-known ‘theoretical strength’ of metals. This is done by calculating ideal twin stress in five b.c.c. transition metals, and in Ir, Cu and Al. This leads us to a first-principles, quantum-mechanical confirmation of the Frenkel mo…
Structural Phase Transitions of the Polymorphs of CsSnI3 by Means of Rietveld Analysis of the X-Ray Diffraction
Abstract The successive phase transitions of the polymorphs of CsSnI3 were studied by means of the powder X-ray diffraction and their crystal structures were analyzed at three different temperatures by the Rietveld method.
Stereocomplex formation between enantiomeric poly(lactic acid)s. 2. Stereocomplex formation in concentrated solutions
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereocomplex formation between enantiomeric poly(lactic acid)s. 2. Stereocomplex formation in concentrated solutionsHideto Tsuji, Fumitaka Horii, Suong Hyu Hyon, and Yoshito IkadaCite this: Macromolecules 1991, 24, 10, 2719–2724Publication Date (Print):May 1, 1991Publicatio…
Microscope textures of nematic droplets in polymer dispersed liquid crystals
Computer simulations are made of polarizing microscope textures of supramicron-sized nematic droplets with director configurations which commonly occur in polymer and other dispersions. The simulations are computed from polarization rotations and phase shifts caused by nonuniform optical anisotropies of the nematic st…
X-ray induced reduction effects at CeO2 surfaces: An x-ray photoelectron spectroscopy study
XPS techniques are used to study the effects of Al Kα x-rays on the surface chemical composition of CeO2. We find that prolonged exposures cause the formation of some Ce3+ oxidic species at the surface. We have studied the Ce 3p, Ce 3d, O 1s, Ce 4p, Ce 4d, and valence band regions in an attempt to localize the depth o…
Recent advances in x‐ray photoelectron spectroscopy studies of oxides
X‐ray photoelectron spectroscopy (XPS) has often played the major role in the chemical characterization of select surface species, but the extension of that role to larger classes of compounds has generally been limited by such problems as cleanliness, charging, and relaxation shifts. In this article we suggest that a…
Thermal vibrations in convergent-beam electron diffraction
The frozen phonon technique is introduced as a means of including the effects of thermal vibrations in multislice calculations of CBED patterns. This technique produces a thermal diffuse background, Kikuchi bands and a Debye–Waller factor, all of which are neglected in the standard multislice calculation. The frozen p…