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Abstract An isotactic polypropylene homopolymer (PP) was added with 0 to 10000 ppm of γ-quinacridone, a β-crystal nucleator of PP. Flexural test specimens were injection-molded from the PP at cylinder temperatures of 200 to 320 °C and the structures and properties have been studied. The results can be summarized as fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantum Confinement Effects in CdSe Quantum DotsB. Zorman, M. V. Ramakrishna, and R. A. FriesnerCite this: J. Phys. Chem. 1995, 99, 19, 7649–7653Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://doi.org/10.1…
The rate of crack growth by apparent intergranular decohesion of a statically loaded MnMoNiCr steel at 535–600°C in vacuum was measured using the d.c. potential-drop method. Slow-displacement-rate testing of notched tensile bars at the same temperatures in an inert atmosphere was also carried out. The steel had been a…
Electrochemical impedance spectroscopy (EIS) was used to measure the solid‐state diffusion coefficient of protons in nickel hydroxide films at room temperature as a function of state of charge (SOC). A model for the complex faradaic impedance of the nickel hydroxide active material is presented and used to extract the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Catalytic Properties of Manganese Porphyrins Incorporated into Phosphonate NetworksDavid Deniaud, Bernd Schollorn, Daniel Mansuy, Jean Rouxel, Pierrette Battioni, and Bruno BujoliCite this: Chem. Mater. 1995, 7, 5, 995–1000Publication Date (Print):May 1, 1995Pu…
Thin films of V 1- x W x O 2 were deposited on glass and Si by dual-target sputtering and characterized by thin film X-ray diffraction (XRD), Rutherford backscattering spectrometry (RBS) and spectrophotometry. The relationship between x (0-0.026) and the phase transition temperature τ c (0-67° C) in the most applicabl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntroduction: Heterogeneous CatalysisSteven M. GeorgeCite this: Chem. Rev. 1995, 95, 3, 475–476Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pubs.acs.org/doi/10.1021/cr00035a001https://doi.org/10.1021/cr…
For a quarter of a century X-ray diffraction in single crystals was unique in its ability to solve three-dimensional structures of proteins and nucleic acids at atomic resolution. The situation changed in 1984 with the completion of a protein structure determination by nuclear magnetic resonance (NMR) spectroscopy in…
Thin films of zirconium titanate on quartz glass were prepared using radio-frequency magnetron sputter deposition at various substrate temperature (Td from 25 to 450 °C). Crystallinity of the films sets in either at Td=400 °C or after annealing in air up to 650 °C. The refractive index showed monotonic increase with T…
A model is presented to calculate the rate of crack advance in the stepwise decohesion process which can result from the stress-induced penetration of a surface-adsorbed element into a solid, usually along grain boundaries. We call this process dynamic embrittlement. The model employs a diffusion equation containing b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvidence for Polyelectrolyte/Ionomer Behavior in the Collapse of Polycationic GelsSerguei G. Starodoubtsev, Alexei R. Khokhlov, Eugene L. Sokolov, and Benjamin ChuCite this: Macromolecules 1995, 28, 11, 3930–3936Publication Date (Print):May 1, 1995Publication History Publish…
The subject of X-ray microscopy (high-resolution X-ray imaging of general nonperiodic structures), an area in which much progress has been made in recent years, is reviewed. The main techniques are briefly described. Achievable performance levels, which for many years were highly speculative, can now be understood wit…
The cavitation corrosion behavior of nickel-aluminum bronze (NAB) was investigated in seawater, using a 20-kHz ultrasonic vibrator. Cavitation tests were made under free corrosion and cathodic protection conditions. Electrochemical measurements were made to elucidate the role of cavitation. The presence of cavitation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComposites of Electronically Conductive Polyaniline with Polyacrylate-Silica Hybrid Sol-Gel MaterialsYen Wei, Jui-Ming Yeh, Danliang Jin, Xinru Jia, Jianguo Wang, Guang-Way Jang, Chengchang Chen, and Ronald W. GumbsCite this: Chem. Mater. 1995, 7, 5, 969–974Publication Date…
The current-voltage characteristics and the photoresponse of metal-porous Si–p-type Si heterostructures have been studied. It is shown that the common interpretation of the current-voltage characteristics, which assumes that the current is limited by the Schottky barrier at the metal-porous Si interface, is wrong. An…
The electronic ground state and magnetic properties of the wide-gapped antiferromagnetic insulator ${\mathrm{LaFeO}}_{3}$ have been investigated by $^{57}\mathrm{Fe}$ M\"ossbauer spectroscopy at pressures up to 63 GPa and temperatures of 7--300 K. Two separate magnetic-electronic phase transitions have been identified…
The first part of this paper deals with the justification of B\"assler's phenomenological random-walk model for viscous liquids [Phys. Rev. Lett. 58, 767 (1987)], which considers the random walk of a ``particle'' representing the liquid state on a d-dimensional infinite cubic lattice with site energies chosen randomly…
Measurements of hydrogen loading and unloading in a quasicrystal are reported. The icosahedral phase (i phase) in a Ti-Zr-Ni alloy demonstrates hydrogen absorption from the gas phase at a temperature of 260 \ifmmode^\circ\else\textdegree\fi{}C and a pressure of 40 atmospheres. The incorporation of hydrogen causes the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix Infrared Spectroscopic and ab Initio Studies of ZnH2, CdH2, and Related Metal Hydride SpeciesTim M. Greene, Wendy Brown, Lester Andrews, Anthony J. Downs, George V. Chertihin, Nino Runeberg, and Pekka PyykkoCite this: J. Phys. Chem. 1995, 99, 20, 7925–7934Publication…
A protein preparation to be used for crystallization should be homogeneous and should remain so throughout the course of a prolonged crystallization experiment. General methods for preparation of pure proteins and for prevention of their covalent modification (through proteolysis, sulfhydryl oxidation, etc.) during pr…