T. F. Koetzle、M. S. Lehmann、J.J. Verbist 等 4 位作者1972-11-15Acta Crystallographica Section B
A neutron diffraction study of L-lysine monohydrochloride dihydrate, C6H15N202. C1.2H20, has been carried out. The structure is monoclinic, space group P2~ with Z = 2. Cell parameters are: a = 7492 (1), b = 13.320 (4), c= 5.879 (1)/~, fl= 97.79 (1) ° [Wright & Marsh, Acta Cryst. (1962), 15, 54]. Least-squares refineme…
Crystallography and molecular interactionsEnzyme Structure and FunctionX-ray Diffraction in Crystallography
Naresh S. Dalal、J. R. Dickinson、C. A. McDowell1972-11-15The Journal of Chemical Physics
Electron paramagnetic resonance (EPR) studies of defect centers produced by x or γ irradiation of the hydrogen-bonded ferroelectrics KH2AsO4, KD2AsO4, RbH2AsO4, RbD2AsO4, and CsH2AsO4 and of the antiferroelectrics NH4H2AsO4 and ND4D2AsO4, are presented. The spectra, observed over 300–4.2°K, are characterized by a very…
Crystal Structures and PropertiesNonlinear Optical Materials ResearchSolid-state spectroscopy and crystallography
L. Messick、William C. Walker、R. Glosser1972-11-15Physical review. B, Solid state
Direct near-normal-incidence reflectance spectra were measured for MnO, CoO, and NiO between 3 and 27 eV at room temperature and below, and the corresponding dielectric response functions, $\ensuremath{\epsilon}={\ensuremath{\epsilon}}_{1}+i{\ensuremath{\epsilon}}_{2}$, were obtained by Kramers-Kronig inversion. Therm…
Glass properties and applicationsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Hisanobu Ogoshi、Yutaka Saito、Kazuo Nakamoto1972-11-15The Journal of Chemical Physics
The infrared spectra of porphin and its metal complexes with 64Zn, 68Zn, Cu, and Ni have been obtained from 4000 to 100 cm−1. Normal coordinate analyses have been carried out on the D4h model of the porphin complexes with 64Zn, 68Zn, Cu, and Ni. Only the eighteen in-plane vibrations have been calculated. The results i…
Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
J. Sak1972-11-15Physical review. B, Solid state
We attempt to determine the binding energy and the wave function of the ground state of an electron that is attracted to the surface of an ionic crystal by its image potential and is repelled from the interior of the solid. For ionic crystals, such as LiF, the electrostatic theory is inadequate and the solid must be t…
Semiconductor materials and devicesElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
David Peters1972-11-15The Journal of Chemical Physics
A simple device for use with open shell SCF computations is proposed. This method eliminates the nonphysical elements in the usual method and leaves a simple operator which is easily computed or approximated.
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMolecular spectroscopy and chirality
G. Paul Montgomery、M. V. Klein、B. N. Ganguly 等 4 位作者1972-11-15Physical review. B, Solid state
A detailed experimental and theoretical study of the defect-induced far-infrared and first-order-Raman spectra of the NaCl: ${\mathrm{Ag}}^{+}$ system has been made. New low-temperature Raman data revealed many singularities pertaining to pure and perturbed phonons. Only a few of the singularities could be assigned to…
Quantum and electron transport phenomenaGlass properties and applicationsSolid-state spectroscopy and crystallography
K. H. Rieder、M. Ishigame、L. Genzel1972-11-15Physical review. B, Solid state
The first observation of surface-phonon-surface-plasmon coupling in small particles is reported. Thin layers of semiconducting CdO microcrystals with various free-carrier concentrations were used as samples. The coupling manifests itself in the infrared-absorption spectra through two absorption maxima corresponding to…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchSpectroscopy and Quantum Chemical Studies
F. Brisse、David J. Stewart、Vlastimil Seidl 等 4 位作者1972-11-15Canadian Journal of Chemistry
The cubic pyrochlores Cd 2 Nb 2 O 7 , Cd 2 Ta 2 O 7 , Sn 2 Nb 2 O 7 , Sn 2 Ta 2 O 7 . Cd 2 Sb 7 O 7 , Ca 2 Sb 2 O 7 , Mn 2 Sb 2 O 7 , Pb 2 Sb 2 O 7 , and related compounds were prepared and investigated by a number of methods. On heating above 700°. Ca 2 Sb 2 O 7 (pyrochlore) transformed to Ca 2 Sb 2 O 7 (weberite), w…
Advanced Condensed Matter PhysicsNuclear materials and radiation effectsChemical Synthesis and Characterization
Tooru Taga、Masanori Senma、K. Osaki1972-11-15Acta Crystallographica Section B
The crystal structure of trehalose dihydrate has been solved by direct methods and refined to an R index of 0-057 using anisotropic refinement. The space group is P212121 and four formula units of C12HzzOz~.2HzO are contained in the unit cell of dimensions a= 17.90, b= 12.21 and c= 7.586 A. The two glucopyranose resid…
Enzyme Structure and FunctionMicrobial Metabolites in Food BiotechnologyDiet, Metabolism, and Disease
M. D. Levenson、Christos Flytzanis、N. Bloembergen1972-11-15Physical review. B, Solid state
We have used the second harmonic of a Nd: glass laser and a continuously tunable dye laser to measure the variation of the third-order nonlinear susceptibility ${|{\ensuremath{\chi}}^{(3)}(\ensuremath{-}2{\ensuremath{\omega}}_{1}+{\ensuremath{\omega}}_{2}, {\ensuremath{\omega}}_{1}, {\ensuremath{\omega}}_{1}, \ensurem…
Diamond and Carbon-based Materials ResearchAdvanced Fiber Laser TechnologiesPhotorefractive and Nonlinear Optics
Glen A. Slack1972-11-15Physical review. B, Solid state
The thermal conductivities $\ensuremath{\kappa}$ of over twenty different single crystals of synthetic ZnO, ZnS, ZnSe, ZnTe, CdTe, and of natural, cubic ZnS have been measured from temperatures of 3 to 300 K. The results for the undoped crystals above 30 K can be scaled using the parameter $\overline{M}\ensuremath{\de…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsThermography and Photoacoustic Techniques
T. Wolfram1972-11-13Physical Review Letters
The lowest conduction bands of a number of perovskites are determined principally by the ($\mathrm{pd}\ensuremath{\pi}$) interaction which mixes the ${t}_{2g} d$ orbitals of the transition-metal ion with the $p$ orbitals of the oxygen. Because of the planar character of the ($\mathrm{pd}\ensuremath{\pi}$) interaction,…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsElectronic and Structural Properties of Oxides
William L. Clinton、L. J. Massa1972-11-13Physical Review Letters
We present a method for the conversion of x-ray diffraction data into an electron density which reflects the antisymmetry of the N-electron wave function.Received 24 January 1972DOI:https://doi.org/10.1103/PhysRevLett.29.1363©1972 American Physical Society
Advanced Chemical Physics StudiesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
E. Courtens1972-11-13Physical Review Letters
Accurate birefringence measurements on monodomain SrTi${\mathrm{O}}_{3}$ platelets give important information about the fluctuations associated with the second-order structural phase transition. Above the transition, the monodomain character is announced by a birefringence tail caused by anisotropic fluctuations. Beca…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography
John J. McNerney、Peter R. Buseck、R. C. Hanson1972-11-10Science
The adsorption of elemental mercury vapor on a thin (several hundred angstroms) gold film produces resistance changes in the film. An instrument for the detection of mercury based on this phenomenon is simple and rapid and requires no chemical separations other than passage of the vapor sample through a few standard d…
Semiconductor materials and devicesPlasma Diagnostics and ApplicationsCopper Interconnects and Reliability
J. F. Padday1972-11-07Proceedings of the Royal Society of London A Mathematical and Physical Sciences
Abstract The height of a sessile drop first increases as the drop size increases and then diminishes to a limiting value for very large drops. The variation of sessile drop height with drop size has been calculated and is given in graphical form for a very wide range of drop size and of contact angle. These data are t…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsNanomaterials and Printing Technologies
Alan J. Walton1972-11-01Physics Education
The author criticizes the shortcomings of the usual text book explanations of surface tension and capillary rise which are two quite different types of phenomena.
Surface Modification and Superhydrophobicity
N. Saglio、Ph. Berticat、Guy Vallet1972-11-01Journal of Applied Polymer Science
Abstract The thermal degradation of saturated chlorinated polyethylene in powder and fiber form has been studied. Direct observations of fiber length variations have enabled us to prove the reactional mechanisms proposed. In the temperature range of 200°–300°C, the material exhibits some fluidity. Its degradation is e…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Foaming and Composites
Christopher W. Macosko、Gary J. Brand1972-11-01Polymer Engineering and Science
Abstract An activation energy theory of yielding in glassy polymers has been proposed by Starita and Keaton. It predicts a linear relation between energy to yield and test temperature. This concept was tested and found valid for five amorphous polymers; poly(methyl methacrylate), polycarbonate, polyarylsulfone, polysu…
Polymer crystallization and propertiesMaterial Dynamics and PropertiesPolymer Nanocomposites and Properties