Materials Literature
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The modified embedded atom method (MEAM) is an empirical extension of embedded atom method (EAM) that includes angular forces. The MEAM, which has previously been applied to the atoms in the FCC, BCC, and diamond cubic crystal systems, has been extended to the HCP crystal structure. Parameters have been determined for…
Plasma treatment of silicone surfaces is a useful way of increasing wettability to improve adhesion and a first step in producing various organosilicon thin-film composites. Despite numerous earlier studies, there is no consensus on the effect of plasma treatment nor on the mechanism of the subsequent hydrophobic reco…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolylactide stereochemistry: effect on enzymic degradabilityMichael S. Reeve, Stephen P. McCarthy, Milton J. Downey, and Richard A. GrossCite this: Macromolecules 1994, 27, 3, 825–831Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Publis…
Phase behaviour near the order–disorder transition (ODT) of 58 model hydrocarbon diblock copolymers, representing four different systems, is summarized. Six distinct ordered-state microstructures are reported, including hexagonally modulated lamellae (HML), hexagonally perforated layers (HPL) and a bicontinuous cubic…
Suspensions of rod-like cellulose crystallites of axial ratio ≈ 20–40, prepared by acid hydrolysis of natural cellulose fibres with sulphuric acid, give stable ordered fluids that display well-formed textures and disclinations characteristic of chiral nematic liquid crystalline phases. The critical volume fraction for…
Preface. 0: How to use this book. 1: Introduction. 2: Basic group theory: definitions and formulae. 3: Parametrization of symmetry operations. 4: Symmetry operations: notation and properties. 5: Notation for point groups, single and double. 6: Derivation of the proper and improper point groups. 7: Direct product, semi…
Dendritic structures are the predominant microstructural constituents of solidified alloys. The microstructural scales of dendrites, such as primary and secondary arm spacings, control the segregation pattern that largely determines the properties of the material. Within the past decade significant developments in und…
Crystal Chemistry of Mullite Phase Equilibria of Mullite Mullite Synthesis Mullite Processing Properties of Mullite Ceramics Industrial Use of Mullite.
Resistivity, thermopower, and Hall-effect measurements on large single crystals of the anatase form of TiO2 all indicate high mobility n-type carriers that are produced by thermal excitation from a density of ∼1018 cm−3 putatively present shallow donor states. The decrease of the mobility with increasing temperature i…
The split Hopkinson pressure bar (SHPB) is being widely used to determine the dynamic compressive strength of ceramics and ceramic composites. However, extreme caution needs to be exercised while testing these highstrength ceramics at high strain rates. The highest strain rate at which ceramics can be tested using an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, characterization, and photophysics of the quantum dot quantum well system cadmium sulfide/mercury sulfide/cadmium sulfideA. Mews, A. Eychmueller, M. Giersig, D. Schooss, and H. WellerCite this: J. Phys. Chem. 1994, 98, 3, 934–941Publication Date (Print):January…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMeasurements and calculations of the hyperpolarizabilities of atoms and small molecules in the gas phaseDavid P. Shelton and Julia E. RiceCite this: Chem. Rev. 1994, 94, 1, 3–29Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published in…
Local atomic structures of Zr and dopant cations in zirconia solid solutions with Fe 2 O 3 , Ga 2 O 3 , Y 2 O 3 , and Gd 2 O 3 have been determined. The Zr ions in both partially stabilized tetragonal and fully stabilized cubic zirconia have their own characteristic structures which are dopant‐independent. The dopant…
By making use of the fact that domain-wall motions do not produce volumetric changes, an experimental method is introduced to directly and quantitatively determine the domain-wall and intrinsic contributions to the piezoelectric and dielectric responses of a ferroelectric material. Utilizing this method, the contribut…
In a brief history of the discovery of antiferroelectricity in liquid crystals, the important role played by tristable switching, i.e. an electric field induced phase transition from antiferroelectric SCA* to ferroelectric SC*, has been emphasised and the antiferroelectric herringbone structure of SCA* has been presen…
Oxidation Catalysis by Metalloporphyrins - A Historical Perspective The Mechanisms of Reaction of Hypervalent Oxochromium, Iron and Manganese Tetraphenylporphyrins with Alkenes Theoretical Studies of Oxometalloporphyrins and Their Reactions with Organic Substrates Cytochrome P450 Model Systems Heme Proteins in Prostag…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"N-Confused Porphyrin": A New Isomer of TetraphenylporphyrinHiroyuki Furuta, Tsutomu Asano, and Takuji OgawaCite this: J. Am. Chem. Soc. 1994, 116, 2, 767–768Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 199…
We have developed a new class of magnetic resonance imaging contrast agents with large proton relaxation enhancements and high molecular relaxivities. The reagents are built from the polyamidoamine form of Starburst dendrimers in which free amines have been conjugated to the chelator 2-(4-isothiocyanatobenzyl)-6-methy…
M. J. Zaworotko, Chem. Soc. Rev., 1994, 23, 283 DOI: 10.1039/CS9942300283
An ultralarge pore titanium silicate with MCM-41 structure has been prepared by direct hydrothermal synthesis; this material gives rise to useful catalysts for the selective oxidation of small and large organic compounds.