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  • 1
    Electronic Resource
    Electronic Resource
    Styrene polymerization in three-component cationic microemulsions (1990)
    s.l. : American Chemical Society
    Langmuir 6 (1990), S. 1040-1044 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00096a002
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and imaging of macro-bicrystals in thin films (1988)
    Springer
    Applied physics 47 (1988), S. 413-417 
    Details
    ISSN: 1432-0630
    Keywords: 61.70.Ng ; 68.35.p
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A recently proposed technique for preparing, in a very simple way, thin film tilt grain boundaries is described and analyzed. Some electron microscopy characterization of the bicrystals is presented and a comparison between this new method and some of the standard techniques is made from a critical point of view. Some new applications of grain boundary research using this technique are also proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615507
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  • 3
    Electronic Resource
    Electronic Resource
    Statistical distribution functions in 2D foams (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7317-7321 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The statistical distribution of bubbles in a 2D foam has been determined according to their area. A 2D foam chamber was designed and constructed, which allows long-term video recordings to be made. The bubbles corresponding to the last six frames, when the so-called scaling state is attained, were digitized at equally spaced time intervals, to measure their surface and count their number of neighbors. From the numerical results the empirical distribution functions are determined. Kolmogorov's compatibility criterion was used to measure the differences between these empirical and three theoretical distribution functions: the normal distribution (bad fit, but a favorite of earlier reports), the power regression (good fit), and the log normal (the best fit). © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358020
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  • 4
    Electronic Resource
    Electronic Resource
    Optical characterization of SiO2 glass gels (1989)
    Springer
    Journal of materials science 8 (1989), S. 1117-1118 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01730041
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  • 5
    Electronic Resource
    Electronic Resource
    Fractal structure of the pore surface of hydrated portland cement pastes (1990)
    Springer
    Journal of materials science 9 (1990), S. 1115-1116 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00727895
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  • 6
    Electronic Resource
    Electronic Resource
    Illumination-induced surface charges on thin diamond films at different wavelengths (1996)
    Springer
    Journal of materials science 7 (1996), S. 381-383 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Contact angle studies of pure water droplets were carried out on thin diamond films. The films were deposited on a fresh Si 〈111〉 wafer by plasma assisted chemical vapour deposition (PACVD) and confirmed to be diamond by Raman spectroscopy and scanning electron microscopy. Advancing and receding contact angles were measured as a function of droplet volume by using different incident wavelengths: red, green and violet. Large differences in the contact angles were observed, depending on the wavelength of the incident light. These differences are usually related to the existence of illumination-induced surface charges or electromagnetically active inhomogeneities in the diamond films. The results show that this technique is sufficiently sensitive to correlate changes in the contact angle with changes in the wavelength used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00180773
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  • 7
    Electronic Resource
    Electronic Resource
    Optical properties of chlorophyll-doped silica gels (1997)
    Springer
    Journal of materials science 8 (1997), S. 1-5 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Optical characterization is presented for a silicon oxide amorphous matrix (prepared by the sol–gel method) doped with chlorophyll. The gel fabrication procedure and the doping process are first described. Then the optical behaviour from ultraviolet to far infrared is analysed. Gel samples with and without chlorophyll are studied morphologically by SEM in order to determine the spatial homogeneity of the gel matrix and the chlorophyll distribution. Finally, a mathematical model is proposed for behaviour of the gel-doped absorption coefficient as a function of chlorophyll concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018564109602
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  • 8
    Electronic Resource
    Electronic Resource
    Porosimetry studies on polyacrylic acid-ZnO cements (1990)
    Springer
    Journal of materials science 1 (1990), S. 154-156 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract The porosity of ZnO-polyacrylic acid (PAA) composites was studied by mercury intrusion porosimetry and scanning electron microscope. There seems to be a dependence of the porosity on the ZnO/PAA ratio and a particular value for which the pore volume is a minimum. These results are analysed and explained in terms of the reaction kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00700875
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis and processing of hydroxyapatite ceramic tapes with controlled porosity (1995)
    Springer
    Journal of materials science 6 (1995), S. 19-23 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Hydroxyapatite (Ca10(PO4)6(OH)2) ceramic sheets with a wide range of porosities (up to 62%) have been prepared. The process is based on the reaction between dicalcium phosphate (CaHPO4) and calcium carbonate (CaCO3). When mixed with the appropriate Ca/P ratio, this proves to be a reliable new method for obtaining hydroxyapatite. Moreover, CaCO3 serves as a gas-forming agent (due to the evolution of carbon dioxide and water during the reaction), which leads to the development of highly porous microstructures. Alternatively, CaHPO4 and CaCO3 can be reacted by calcining at 1000°C to produce pure hydroxyapatite powders. When processed in a similar way, a dense ceramic results. By mixing 50 vol% of CaCO3 and CaHPO4 with precalcined powders, hydroxyapatite with an intermediate porosity was obtained. Moreover, it should be possible to achieve porosity control by mixing different amounts of uncalcined and precalcined powders. All of these powders are colloidally processed using tape casting to produce thin sheets 150–200 μm thick. This technique can be used to make laminates, with or without porosity gradients, up to several millimetres thick.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121241
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  • 10
    Electronic Resource
    Electronic Resource
    UV radiation effects on SiO2 gels doped with organic dyes (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 911-916 
    Details
    ISSN: 1573-4846
    Keywords: UV irradiation ; dye laser gels ; luminescence ; organic dyes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Silica gels prepared by the sol-gel method with TEOS, as a precursor and doped with the organic dyes rhodamine B, Na fluoresceine and eosine G were exposed to UV radiation pulses from a nitrogen laser. The absorption, luminescence and IR spectra were taken as a function of the exposure time. The absorption and the luminescence curves show successive maxima and minima. The same response is observed when the exposure procedure is repeated. These results are explained in terms of the cyclic filling and depletion of the long-lived triplet excited electronic state. At short exposure times, the data can be fitted with a Lorentzian curve and the corresponding parameters are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436959
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