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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic properties of fine Ni particles coated with Pd (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5903-5903 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ni-Pd composite fine particle is an ideal system to study surface and interface magnetism because of its large surface area compared with the total volume. In this work, magnetic properties of Ni-Pd composite fine particles were studied in terms of the magnetic proximity effect and the effect of hydrogenation. The composite particle consists of Ni core and Pd shell. Five different particles with different Pd shell thicknesses, 50, 100, 150, 200, and 350 A(ring), were prepared. The average diameter of the Ni core is about 0.7 μm. The Curie temperatures of all the samples are lying around 630 K and are nearly equal to that of a bulk Ni. Unlike pure Ni, the samples exhibit a relatively large coercive force of a few hundred Oersted in the temperature range from 4.2 to 750 K. The magnetization of the Ni core is found to be somewhat lower than that of pure Ni. An enhanced interface anisotropy due to the Pd coating (∼−1.5×105 J/m3) seems to impede saturation. Before hydrogenation, there appears quite a large thermal hysteresis. On heating, the isofield magnetization exhibits ferromagnetic behavior with a rise of magnetic moment below 30 K, suggesting that there is induced magnetization in the Pd shell. The change in magnetization follows the Curie–Weiss law, which gives a Curie temperature of 22 K. However, the steep rise of magnetization is not observed in the cooling process. After hydrogenation, this ferromagnetic behavior completely vanishes. There is also observed no lattice expansion, but this isovolumetric constraint seems to have little change on the saturation hydrogen loading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355555
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  • 2
    Electronic Resource
    Electronic Resource
    Electronic structure of vinylthio radical (CH2CHS): A theoretical study (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4223-4229 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A predictive ab initio MO calculation was performed for the thus far undetected sulfur analog of the vinoxy radical. Multiconfigurational self-consistent field (MCSCF) and symmetry adapted cluster expansion–configuration interaction (SAC–CI) wave functions were used to describe the electronic structure of the radical. The symmetry species of the ground state was found to be 2A‘ as in the case of the vinoxy radical. The crucial difference between the two radicals is that the thio-radical is more or less characterized as a sulfur-centered radical, CH2=CH–S⋅ whereas the oxy-radical is regarded as a carbon centered ⋅CH2–CH=O in their ground state. Excitation energies, normal modes, Franck–Condon factors, hyperfine coupling parameters, and electron affinity were predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458754
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  • 3
    Electronic Resource
    Electronic Resource
    Calculation of hyperfine coupling constant by symmetry adapted cluster expansion configuration interaction theory. II. Anisotropic constants (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 7284-7292 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Following the previous work on the isotropic hyperfine coupling constants (HFCCs) of polyatomic radicals the symmetry adapted cluster expansion–configuration interaction (SAC–CI) theory is applied to calculate anisotropic HFCCs also. The results are compared with available experimental data from diatomic to polyatomic radicals such as the vinoxy. For radicals consisting of only the first row atoms Dunning's double zeta (DZ) basis set is shown to be adequate, but for those containing the second row atoms inclusion of polarization functions is required. Compared with the isotropic HFCC the calculation of the anisotropic HFCC is less formidable. However, ignorance of electron correlation causes serious disagreements with experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459400
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  • 4
    Electronic Resource
    Electronic Resource
    Vibrational analysis and calculation of Franck–Condon factors for the vinoxy radical X˜(2A‘) and B˜(2A‘) states (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4211-4222 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Vibrational analysis and calculation of Franck–Condon factors (FCF) of the vinoxy radical were performed for the two electronic states in the title. Multiconfigurational self-consistent field (MCSCF) wave functions were used to calculate the optimized geometries and the energy gradients of both states. Vibrational analysis was carried out with the harmonic approximation, and FCFs were calculated taking into account the Duschinsky rotation. The features of the experimental absorption and laser-induced fluorescence (LIF) spectra were reproduced with the calculated FCFs. Previous analyses of the experimental spectra based on an oversimplified model were critically discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458753
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  • 5
    Electronic Resource
    Electronic Resource
    Cross-Sectional TEM Analysis of Structural Change in 4H-SiC Single Crystal Irradiated by Femtosecond Laser Pulses (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 600-603 (Sept. 2008), p. 883-886 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: We carried out cross-sectional transmission electron microscopy (TEM) investigation offemtosecond laser-induced ripples formed on 4H-SiC single crystal surface. Here, we paid attentionto the crystal structures underlying the coarse and fine ripples and the three-dimensional distributionof amorphous phase. Conventional and high-resolution TEM analyses made clear that a continuousamorphous layer approximately of 50 nm thick exist at the topmost region of both coarse and fineripples. The result strongly suggests that the fundamental surface deformation process is common forcoarse and fine ripples, even though the factors which determine their periods are different
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.600-603.883.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Strength Analysis of MEMS Micromirror Devices - Effects of Loading Mode and Etching Damage (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 527-532 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Strength evaluation method for MEMS micromirror has been proposed. Pure bending and combined loading tests have been performed and torsion strength has been estimated from those results. Two-parameter Weibull distribution was used to evaluate the fractured stresses estimated from FEM model. There exists the difference in strength between pure bending and combined loading. From the load factor analysis, it is found that both geometry and stress distribution have to be considered to estimate the strength of MEMS since flaw population is non-uniformly distributed. It is also found torsional strength can be estimated on the safe side by using the result of combined loading test. From the comparison between two kinds of specimen fabricated by different etching conditions, it is found that the fracture strength is greatly affected by the amount of etching damage (notching)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.527.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Study on Structure Transformation of Si Wafer in Grinding Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 373-378 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, the surface and subsurface of silicon wafers ground by different wheels havebeen studied. In the conventional grinding with diamond wheels, it is shown from the top that thesubsurface of wafer consists of amorphous Si, followed by a thin damaged layer, strained crystal witha large compressive residue stress, and then the bulk material in single crystal. In a severe conditionwhich causes grinding burn, part of amorphous Si is re-crystallized to form a poly-crystal Si, and partof amorphous Si possibly reacts with oxygen to form SiO2. This phenomenon becomes morepronounced in the backgrinding process with a fine grit diamond wheel when the conditions areimproperly selected. In order to obtain a defect-free crystal Si structure in grinding, authors haveproposed a new chemo-mechanical grinding (CMG) process which enables to remove Si from waferbut with no structure transformation induced to its surface
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.373.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Isolation, and biochemical and biological characterization of an a-mating-type-specific glycoprotein responsible for sexual agglutination from the cytoplasm of a-cells, in the yeast Saccharomyces cerevisiae (1984)
    Springer
    Archives of microbiology 140 (1984), S. 113-119 
    Details
    ISSN: 1432-072X
    Keywords: Agglutination substance ; Cell-cell recognition ; Glycoprotein ; Mating ; Saccharomyces cerevisiae ; Sexual agglutinability ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An a-mating-type-specific substance responsible for sexual agglutination was purified to 397-times in specific activity (units/mg protein) from the cytoplasm of a-mating type cells. The purified substance gave a single band stained with PAS reagent but not with both Coomassie brilliant blue and silver staining reagent by polyacrylamide gel electrophoresis in the presence of 8 M urea. However, incorporation of [35S]methionine and Lowry reaction clearly indicate that the substance is a glycoprotein. The substance specifically masked sexual agglutinability of cells of the opposite mating type α, indicating univalent action. The substance is a glycoprotein with a carbohydrate content of 90%, a pI of 4.5, and a molecular weight of 130,000. The substance was inactivated by 2-mercaptoethanol and proteolytic enzymes but not by glycolytic enzymes. The substance formed a complementary complex having no biological activity when mixed with α-agglutination substance from the wall or cytoplasm of α-cells in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00454912
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  • 9
    Electronic Resource
    Electronic Resource
    Mating-type differentiation in ascosporogenous yeasts on the basis of mating-type-specific substances responsible for sexual cell-cell recognition (1984)
    Springer
    Molecular genetics and genomics 194 (1984), S. 24-30 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Sexual agglutination occurred only between cells of opposite mating types of the same species in all the Sacharomyces, Hansenula, Saccharomycodes, and Pichia yeasts tested. We succeeded in solubilizing the sex-specific glycoprotein, cell wall agglutination substance responsible for sexual agglutinability by briefly autoclaving these yeasts. The agglutination substances of all the above yeasts were univalent and sensitive to the enzyme pronase. The formation of complementary complexes was observed only between agglutination substances of opposite mating types of the same species. In general, the agglutination substance of one mating type was more resistant to heat treatment at 100°C in 3% acetic acid and more sensitive to 5% 2-mercaptoethanol treatment than the agglutination substance of the other mating type in these yeasts. On the basis of these results together with the pheromone response and production, we expect that almost all ascosporogenous yeasts can be classified into the two mating types corresponding to a and α mating types in Saccharomyces cerevisiae, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383492
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  • 10
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    Quantum electrodynamics of a nanocavity coupled with exciton complexes in a quantum dot (2009)
    American Physical Society
    Details
    Publication Date: 2009-10-26
    Print ISSN: 1098-0121
    Electronic ISSN: 1550-235X
    Topics: Physics
    Published by American Physical Society
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